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Modals Of Necessity – Quiz 1
Modals Of Necessity Quiz 1 (30 MCQs)
This multiple-choice question set evaluates the understanding and application of modal verbs expressing necessity, including certainty in sentence meaning, conditional necessity based on time constraints, and distinguishing between obligation and permission. It also tests skills such as identifying "must" versus "have to," negative forms indicating obligation or permission, and using modals for advice and prohibition.
Quiz Instructions
Select an option to see the correct answer instantly.
1.
Identify the modal of necessity in the following sentence: "We have to clean our room before guests arrive."
A) Before.
B) Clean.
C) Have to.
D) Guests.
Show Answer
Explanations:
The modal of necessity in the sentence "We have to clean our room before guests arrive" is "have to." This phrase indicates a requirement or obligation, which is characteristic of modals of necessity.
Option Analysis:
Option A:
Before refers to a time indicator and does not express necessity.
Option B:
Clean is the base form of the verb and does not indicate necessity on its own.
Option C:
Have to correctly expresses the obligation or necessity in the sentence.
Option D:
Guests are the recipients of the action but do not express necessity.
2.
She ..... finish her project before Friday.
A) Must.
B) Don't have to.
C) Need to.
D) Has to.
Show Answer
Explanations:
"Has to" is correct because it indicates a necessity that must be fulfilled, aligning with the requirement for her to finish the project before Friday.
Option Analysis:
Option A:
"Must" can also indicate necessity but is less formal than "has to."
Option B:
"Don't have to" means there is no obligation, which contradicts the requirement.
Option C:
"Need to" suggests a requirement but is not as strong as "has to," often used in less formal contexts.
Option D:
"Has to" clearly expresses the necessity of finishing the project before Friday, making it the most appropriate choice.
3.
We ..... go to the supermarket. There is enough food in the refrigerator.
A) Don't need to.
B) Shouldn't.
C) Can't.
D) None of the above.
Show Answer
Explanations:
The sentence "We ..... go to the supermarket. There is enough food in the refrigerator." indicates that there is no necessity for going to the supermarket because the refrigerator already contains sufficient food. The modal verb "don't need to" expresses this idea of not being required or necessary, making Option A correct.
Option Analysis:
Option A:
Don't need to - Correct. Indicates no necessity for going to the supermarket.
Option B:
Shouldn't - Incorrect. Implies a recommendation against an action rather than stating lack of necessity.
Option C:
Can't - Incorrect. Suggests inability, not lack of necessity.
Option D:
None of the above - Incorrect. Option A is correct.
4.
I think you ..... worry about what they are saying about you. That's my advice anyway.
A) Should.
B) Mustn't.
C) Have to.
D) Shouldn't.
Show Answer
Explanations:
The modal verb "shouldn't" is used to advise against an action, which fits the context of the sentence advising someone not to worry about what others are saying. This aligns with the meaning and usage of "shouldn't," making it the correct choice.
Option Analysis:
Option A:
Should - Implies a recommendation rather than an advice against doing something.
Option B:
Mustn't - Indicates a strong prohibition, which is not the intended meaning here.
Option C:
Have to - Implies necessity or obligation, not advice.
Option D:
Shouldn't - Correctly advises against an action, fitting the context perfectly.
5.
Do I have to come to the meeting?
A) Yes, you should.
B) Yes, you do.
C) No, you do.
D) None of the above.
Show Answer
Explanations:
The modal verb "do" in this context is used to express a sense of necessity, indicating that attendance at the meeting is required. Therefore, option B) Yes, you do, correctly uses the modal verb "do" to convey the necessity.
Option Analysis:
Option A:
Incorrect; "should" implies a recommendation rather than a requirement.
Option B:
Correct; "do" is used to express necessity.
Option C:
Incorrect; "do" cannot be negated in this context to mean the opposite of necessity.
Option D:
Incorrect; all other options are valid.
6.
Fortunately, I ..... take photos to the board in class.
A) Must.
B) Allowed to.
C) Can.
D) None of the above.
Show Answer
Explanations:
"Can" is the correct answer because it indicates a possibility or ability, which fits the context of taking photos to the board in class. The modal verb "can" expresses permission or the ability to do something without implying a strict necessity.
Option Analysis:
Option A:
Must implies a strong obligation, which is not indicated by the sentence.
Option B:
Allowed to suggests a formal permission, but "can" more naturally conveys this in an everyday context.
Option C:
Can correctly indicates ability or permission without strict necessity.
Option D:
None of the above is incorrect since one option (C) is correct.
7.
We can't just go away! We ..... help him!
A) Have to.
B) Can.
C) Must.
D) None of the above.
Show Answer
Explanations:
The sentence "We can't just go away! We must help him!" uses the modal verb "must" to express a strong necessity or obligation, indicating that helping him is required. This aligns with the meaning and usage of "must," making it the correct choice.
Option Analysis:
Option A:
"Have to" also expresses necessity but is less formal than "must." It does not fit as well in this context.
Option B:
"Can" implies ability, which is not the focus here. The sentence emphasizes a need rather than capability.
Option C:
"Must" correctly conveys the strong necessity or obligation to help him, making it the right choice.
Option D:
"None of the above" is incorrect since "must" fits well in this context.
8.
You ..... run at the swimming pool.
A) Can't.
B) Can.
C) Must.
D) None of the above.
Show Answer
Explanations:
The sentence "You ..... run at the swimming pool" implies an action that is not typically performed in a swimming pool environment. The modal verb "can't" (Option A) correctly conveys this impossibility, as running is not a common or appropriate activity in a swimming pool setting.
Option Analysis:
Option A:
Correct. Indicates the inability to run at the swimming pool due to its nature.
Option B:
Incorrect. "Can" implies ability, which is not applicable here.
Option C:
Incorrect. "Must" indicates necessity, which does not fit the context of an inappropriate action.
Option D:
Incorrect. There is a correct answer among the options provided.
9.
You ..... clean your bedroom or your dad will punish you.
A) Should.
B) Had better.
C) Ought to.
D) None of the above.
Show Answer
Explanations:
"Should" implies a general recommendation, "ought to" is slightly more formal and less common in casual speech, and "none of the above" would be chosen if none fit perfectly. However, "had better" conveys a sense of necessity or advice that something should be done to avoid an undesirable outcome, which fits well with the context of facing punishment.
Option Analysis:
Option A:
Should - Implies a general recommendation rather than a strong necessity.
Option B:
Had better - Conveys a sense of necessity to avoid an undesirable outcome, fitting the context well.
Option C:
Ought to - Slightly more formal and less common in casual speech compared to "had better."
Option D:
None of the above - Would be chosen if none fit perfectly, but "had better" fits the context well.
10.
We ..... bring any money because the excursion is free.
A) Didn't had to.
B) Had to.
C) Didn't have to.
D) None of the above.
Show Answer
Explanations:
The sentence "We didn't have to bring any money because the excursion is free" correctly uses the modal verb "didn't have to," indicating that bringing money was not necessary due to the free nature of the excursion. This aligns with the correct answer, Option C.
Option Analysis:
Option A:
Incorrect; "Didn't had to" is a grammatical error.
Option B:
Incorrect; "Had to" implies necessity, which contradicts the free nature of the excursion.
Option C:
Correct; "Didn't have to" properly conveys that bringing money was not required.
Option D:
Incorrect; Option C is valid.
11.
You ..... (not have to) buy us a gift, but it was very nice of you.
A) Don't have to.
B) Not has to.
C) Hasn't to.
D) Didn't have to.
Show Answer
Explanations:
The modal verb "didn't have to" is used to express that an action was not obligatory but was still performed, which fits the context of the sentence perfectly. The phrase indicates that buying a gift was optional and appreciated, but not required.
Option Analysis:
Option A:
Don't have to - This is in the present tense and doesn't fit the past context of the sentence.
Option B:
Not has to - This is grammatically incorrect; "has" should be "have."
Option C:
Hasn't to - This is also grammatically incorrect; "has" should be "have."
Option D:
Didn't have to - Correct. It fits the past context and conveys that it was optional but appreciated.
12.
She ..... confirm her flights.
A) Must have.
B) Have.
C) Has to.
D) None of the above.
Show Answer
Explanations:
The sentence "She has to confirm her flights" is correct because it uses the modal verb "have to," which expresses a necessity or obligation. This fits the context of someone needing to take action due to an external requirement, such as confirming flight arrangements.
Option Analysis:
Option A:
"Must have" implies past necessity and is not suitable for future actions like confirming flights.
Option B:
"Have" alone does not express the sense of obligation or necessity required in this context.
Option C:
"Has to" correctly conveys the necessity, making it the appropriate choice.
Option D:
Not applicable as Option C is correct.
13.
Choose the correct option to complete the sentences:Employees ..... follow the safety protocols at all times.
A) Must.
B) Don't need to.
C) All the above.
D) None of the above.
Show Answer
Explanations:
The sentence requires a modal verb indicating necessity, which is best expressed by "Must" in this context. "Must" conveys that following safety protocols is mandatory and necessary at all times for employees.
Option Analysis:
Option A:
Correct. "Must" indicates the necessity of following safety protocols.
Option B:
Incorrect. "Don't need to" implies that there is no requirement, which contradicts the context of safety protocols needing to be followed at all times.
Option C:
Incorrect. This option suggests both A and B are correct, but only A fits the context properly.
Option D:
Incorrect. There is a clearly correct answer among the options provided.
14.
In Thailand, you ..... stop at a red traffic light.
A) May.
B) Needn't.
C) Might.
D) Must.
Show Answer
Explanations:
In Thailand, you
Must.
stop at a red traffic light. This is a legal requirement and indicates the necessity to follow traffic rules strictly for safety reasons.
Option Analysis:
Option A:
May - implies possibility but not obligation; incorrect as it does not reflect the mandatory nature of stopping at a red light.
Option B:
Needn't - means you do not have to, which is incorrect because there is an obligation to stop.
Option C:
Might - suggests possibility but no certainty; incorrect as it does not reflect the mandatory nature of stopping at a red light.
Option D:
Must - correctly reflects the legal requirement and necessity to stop at a red traffic light, making this the correct answer.
15.
We ..... won't have time to see a film.
A) Perhaps.
B) Definitely.
C) All the above.
D) None of the above.
Show Answer
Explanations:
The sentence "We ..... won't have time to see a film." implies certainty about the lack of available time, which aligns with the use of "Definitely" (Option B). Modals of necessity are used to express certainty or obligation. In this context, "Definitely" conveys that it is certain they will not have time.
Option Analysis:
Option A:
Perhaps - This suggests uncertainty, which does not fit the context.
Option B:
Definitely - This expresses certainty, fitting the context of the sentence.
Option C:
All the above - This is incorrect because "Perhaps" and "Definitely" have different implications regarding certainty.
Option D:
None of the above - This is incorrect as "Definitely" fits the context well.
16.
Which sentence correctly uses a modal of necessity?
A) You have got to see this movie.
B) They will arrive soon.
C) I might go to the park.
D) She can dance very well.
Show Answer
Explanations:
The sentence "You have got to see this movie" correctly uses a modal of necessity, specifically the phrase "have got to," which expresses a strong obligation or necessity.
Option Analysis:
Option A:
Correct. Uses "have got to" for necessity.
Option B:
Incorrect. Uses "will" for prediction, not necessity.
Option C:
Incorrect. Uses "might" for possibility, not necessity.
Option D:
Incorrect. Uses "can" for ability, not necessity.
17.
Mother to son:You ..... make your bed.Son to brother:Mom says we ..... make our beds.
A) Must have to.
B) Mustmust.
C) Have tohave to.
D) None of the above.
Show Answer
Explanations:
The correct answer is
A) Must have to.
In the first sentence, "Mother to son," the modal verb "must" indicates a strong obligation or necessity. The second part of the sentence, "Son to brother," uses "have to" which also expresses a necessity. Both phrases convey that making beds is required.
Option Analysis:
Option A:
Correct. "Must have to" accurately reflects the necessity in both sentences.
Option B:
Incorrect. "Mustmust" is redundant and not grammatically correct.
Option C:
Incorrect. "Have tohave to" would be repetitive and awkward phrasing.
Option D:
Incorrect. There is a valid correct answer among the options provided.
18.
Julissa ..... flying because it's 2 pm and her plane lands at 5 pm.
A) Could be.
B) Must be.
C) Can't be.
D) None of the above.
Show Answer
Explanations:
Julissa must be flying because it's 2 pm and her plane lands at 5 pm indicates a necessity based on the given time constraints. At 2 pm, she cannot yet have arrived since her flight is scheduled to land at 5 pm.
Option Analysis:
Option A:
Could be - This suggests uncertainty or possibility which does not align with the certainty implied by "must be."
Option B:
Must be - Correct. It indicates a necessity based on the timing provided.
Option C:
Can't be - This would imply impossibility, but there's no information suggesting Julissa cannot fly at 2 pm given her flight schedule.
Option D:
None of the above - Incorrect as "must be" is the correct answer.
19.
Don't phone Grandad now. He ..... be at the hospital.
A) Can't.
B) Might.
C) All the above.
D) None of the above.
Show Answer
Explanations:
The modal verb "might" is used to express possibility, which fits the context of the sentence where there's uncertainty about Grandad's location. "Can't" implies impossibility and doesn't fit because we're not sure if he isn't at the hospital; "all the above" would mean both "can't" and "might" are correct, but since we have uncertainty, only "might" is appropriate.
Option Analysis:
Option A:
Incorrect. Implies impossibility which contradicts the sentence's uncertainty.
Option B:
Correct. Expresses possibility fitting the context of uncertainty.
Option C:
Incorrect. "All the above" would mean both "can't" and "might" are correct, but since we have uncertainty, only "might" is appropriate.
Option D:
Incorrect. "None of the above" is not applicable as "might" correctly fits the context.
20.
Currently, non American citizens ..... get a visa to enter the U.S.
A) Must not.
B) Are allowed.
C) Must.
D) None of the above.
Show Answer
Explanations:
The modal verb "must" is used to express a strong requirement or necessity, which aligns with the context of non-American citizens needing a visa to enter the U.S. This indicates that it is necessary for them to obtain a visa before entering.
Option Analysis:
Option A:
"Must not" implies prohibition, which does not fit the context of necessity.
Option B:
"Are allowed" suggests permission rather than necessity.
Option C:
"Must" correctly conveys the necessity for non-American citizens to get a visa before entering the U.S., making it the correct answer.
Option D:
"None of the above" is incorrect since Option C is valid.
21.
Complete the sentences with the correct form of the modals and verbs in parentheses:We ..... (must / maintain) excellence in our customer service or people will complain.
A) Mustn't maintain.
B) Must maintain.
C) Must maintains.
D) None of the above.
Show Answer
Explanations:
The sentence requires a positive statement of necessity, indicating that maintaining excellence is essential to avoid complaints. "Must" expresses this necessity correctly in the present tense.
Option Analysis:
Option A:
Incorrect as it uses a negative form ("mustn't") which contradicts the need for excellence.
Option B:
Correct, using the positive "must" to express necessity.
Option C:
Incorrect as it incorrectly conjugates "must" in third person singular form.
Option D:
Not applicable since Option B is correct.
22.
You ..... touch animals at zoos.
A) Should.
B) Mustn't.
C) May.
D) None of the above.
Show Answer
Explanations:
The modal verb "mustn't" is used to express a strong prohibition, indicating that it is absolutely not allowed to touch animals at zoos for safety and animal welfare reasons.
Option Analysis:
Option A:
Should - This implies a recommendation or suggestion, which does not fit the context of an absolute rule.
Option B:
Mustn't - Correct. It conveys a strong prohibition.
Option C:
May - This suggests permission, which is incorrect as touching animals at zoos is generally prohibited.
Option D:
None of the above - Incorrect since "mustn't" fits the context perfectly.
23.
It's getting late. I ..... go now.
A) Can.
B) Have to.
C) Can't.
D) None of the above.
Show Answer
Explanations:
The sentence "It's getting late. I ..... go now." implies a necessity due to the time. The modal verb "have to" is used to express a strong obligation or necessity, making it the most appropriate choice in this context.
Option Analysis:
Option A:
Can - This suggests ability but not necessarily necessity.
Option B:
Have to - This expresses a strong necessity, fitting the context of the sentence.
Option C:
Can't - This implies inability, which does not match the context of the sentence.
Option D:
None of the above - Since "have to" fits well, this option is incorrect.
24.
Read and choose: "Library Rules" -Students ..... keep quiet inside.
A) Might.
B) May.
C) Can.
D) Must.
Show Answer
Explanations:
"Must" is the correct answer because it indicates a rule that students are required to follow, which aligns with the strict nature of library rules where maintaining silence is essential for all users.
Option Analysis:
Option A:
"Might" suggests possibility rather than necessity.
Option B:
"May" also implies permission, not a mandatory rule.
Option C:
"Can" indicates ability or capability but not obligation.
Option D:
"Must" clearly denotes necessity and is the correct choice for library rules.
25.
She ..... wear a uniform because she's a police officer
A) HAD TO.
B) HAS TO.
C) HAVE TO.
D) DOESN'T HAVE TO.
Show Answer
Explanations:
The sentence "She
HAS TO
wear a uniform because she's a police officer" is correct. The modal verb "has to" indicates a necessity that is required by an external rule or obligation, which fits the context of a police officer wearing a uniform.
Option Analysis:
Option A:
"Had to" implies a past obligation, which does not fit the present context.
Option B:
"Has to" correctly indicates a current necessity or requirement.
Option C:
"Have to" is grammatically incorrect in this context as it should be singular "has to."
Option D:
"Doesn't have to" implies the opposite of what the sentence states, indicating a lack of obligation.
26.
Choose the correct option to complete the sentences:Some companies ..... invest in technology because their customers like traditional products.
A) Mustn't.
B) Don't need to.
C) All the above.
D) None of the above.
Show Answer
Explanations:
The sentence "Some companies
don't need to
invest in technology because their customers like traditional products" is correct. This implies that investing in technology is not a necessity for these companies, as they can meet customer preferences with traditional products.
Option Analysis:
Option A:
"Mustn't" suggests an absolute prohibition, which does not fit the context of the sentence.
Option B:
"Don't need to" accurately reflects that technology investment is not required for these companies due to customer preferences for traditional products.
Option C:
"All the above" would imply that both A and B are correct, which is incorrect since only B fits the context.
Option D:
"None of the above" is incorrect as Option B is the right choice.
27.
A:I cannot sleep properly.B:You ..... drink too much coffee. I think that's the reason of your problem.
A) Need to.
B) Don't need to.
C) Shouldn't.
D) None of the above.
Show Answer
Explanations:
The modal verb "shouldn't" is used to express a recommendation against an action, indicating that the speaker believes it would be better if the subject did not do something. In this context, B suggests that A should avoid drinking too much coffee because it might be causing A's sleep problems.
Option Analysis:
Option A:
Need to - This implies a necessity, which does not fit the context of suggesting an action to avoid.
Option B:
Don't need to - This suggests that there is no requirement for A to do something, which also does not align with the recommendation given by B.
Option C:
Shouldn't - Correct. It implies a suggestion against drinking too much coffee due to its potential negative effect on sleep.
Option D:
None of the above - Incorrect, as "shouldn't" is the appropriate choice here.
28.
Before you enter your hotel room, you ..... check in.
A) Don't have to.
B) Must got to.
C) Has.
D) Must.
Show Answer
Explanations:
The sentence "Before you enter your hotel room, you must check in." uses the modal verb "must" to express a necessity that is required by the hotel's rules or policies. This indicates that checking in is mandatory before entering the room.
Option Analysis:
Option A:
Don't have to - Incorrect because it implies an optional action, not a requirement.
Option B:
Must got to - Grammatically incorrect; "must" is used correctly but "got to" should be "go to."
Option C:
Has - Incorrect as it does not function as a modal verb and does not convey the sense of necessity.
Option D:
Must - Correct because it properly conveys that checking in is necessary before entering the room, aligning with the use of "must" to express a requirement.
29.
Differentiate between "must" and "have to" in the following context: "You ..... be quiet in the library."
A) Can.
B) Must.
C) Might.
D) Have to.
Show Answer
Explanations:
"Must" and "have to" both indicate a necessity, but "must" is more direct and stronger in its insistence. In the context of "You must be quiet in the library," it conveys an absolute requirement that leaves little room for negotiation.
Option Analysis:
Option A:
Can - This implies ability rather than necessity, so it's incorrect.
Option B:
Must - Correct. It indicates a strong necessity without flexibility.
Option C:
Might - This suggests possibility or probability, not a firm requirement, making it wrong.
Option D:
Have to - While similar in meaning, "must" is more direct and formal, fitting the context better. However, both are correct but "must" is slightly more appropriate here.
30.
Choose the correct option to complete the sentences:Companies ..... to deal with complaints quickly or they will lose customers.
A) Need.
B) Must.
C) All the above.
D) None of the above.
Show Answer
Explanations:
The sentence "Companies
Need
to deal with complaints quickly or they will lose customers" correctly uses the modal verb "need," which expresses a necessity or requirement. This is appropriate because it conveys that companies have an obligation to handle customer complaints promptly.
Option Analysis:
Option A:
Need - Correct, as it indicates a necessity.
Option B:
Must - While "must" can also express necessity, "need" is more appropriate in this context as it directly relates to the requirement of dealing with complaints quickly.
Option C:
All the above - Incorrect because "must" is not the best choice here; "need" is more precise for expressing the company's obligation.
Option D:
None of the above - Incorrect as "Need" is the correct answer.
Frequently Asked Questions
What are modals of necessity?
Modals of necessity, such as 'must' and 'have to', express a requirement or obligation that must be followed. They indicate that something is necessary or mandatory in certain situations.
How do modals of necessity differ from other modal verbs?
Modals of necessity, like 'must' and 'have to', are used to express a strong obligation or requirement. Unlike some other modal verbs that might indicate possibility or permission, these focus on the necessity of an action.
Can you use modals of necessity in both present and past tenses?
Yes, modals of necessity can be used in various tenses to express obligations or requirements. For example, 'must' and 'have to' are commonly used in the present tense, while their past forms like 'had to' also indicate necessary actions.
Are there any exceptions when using modals of necessity?
While modals of necessity are generally straightforward, their usage can vary slightly depending on context. For instance, 'must' is often used to express certainty or obligation, whereas 'have to' might be more informal and less forceful in some situations.
How do modals of necessity affect the meaning of a sentence?
Modals of necessity modify the main verb to convey that an action is required or obligatory. They add a sense of compulsion or duty, making it clear that the action must be performed under certain conditions.