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Modals Of Possibility Quiz 1 (30 MCQs)

This multiple-choice question set evaluates the understanding and usage of modal verbs expressing possibility, including certainty, uncertainty, permission, prohibition, and conditional probability. It covers concepts such as distinguishing between "may" and "might," identifying appropriate modal verbs for rules, and assessing likelihood in past events based on evidence.

Quiz Instructions

Select an option to see the correct answer instantly.

1. John could ..... to jail for stealing the money.

Explanations: The modal verb "could" in this context is used to express a possibility, indicating that John might face the consequence of going to jail for his action of stealing money. Therefore, the correct answer is A) Go.

Option Analysis:

Option A: Correct. "Could go to jail" uses the modal verb "could" to express a possibility.
Option B: Incorrect. "Went" is in the past tense and does not fit the context of expressing a future possibility.
Option C: Incorrect. "Not" negates the action, which contradicts the modal verb used to express possibility.
Option D: Incorrect. None of the above is not applicable since one correct option exists.

2. She could be in her office.

Explanations: Option C is correct because it appropriately uses the modal verb "can" to express a possibility, indicating that while there is uncertainty, it is still within the realm of what could be true. The phrase "I'm not sure but it's possible" aligns well with the statement "She could be in her office," showing an acknowledgment of uncertainty.

Option Analysis:

Option A: Incorrect as it uses "sure" and "impossible," which contradicts the possibility expressed in the original sentence.
Option B: Incorrect because it implies certainty ("Because she's normally there at this time"), whereas the original statement is more about a potential rather than a confirmed fact.
Option D: Incorrect for similar reasons as Option A, using "sure" without any indication of uncertainty or possibility.

3. Peter may be late for work this afternoon

Explanations: The sentence "Peter may be late for work this afternoon" expresses a possibility, not certainty. The modal verb "may" indicates that there is an opportunity or chance of something happening but it is not certain. Therefore, the correct answer is C) Possibility.

Option Analysis:

Option A: Incorrect as probability refers to the likelihood of an event occurring, which is not explicitly stated in the sentence.
Option B: Incorrect as ability refers to the capacity or skill to do something, which is not relevant here.
Option C: Correct as it accurately reflects that the sentence expresses a possibility of an event happening.
Option D: Incorrect as advice implies suggesting what someone should do, which is not present in the given sentence.

4. She can't be in her office.

Explanations: Option B correctly uses the modal "sure" to express certainty and "impossible" to convey that there is no possibility of her being in her office, aligning with the statement given.

Option Analysis:

Option A: lacks the word "impossible," making it less definitive.
Option B: expresses certainty and impossibility accurately.
Option C: contradicts the statement by suggesting uncertainty.
Option D: provides a reason but does not address the modal of possibility directly.

5. Choose a, b, or c.It ..... around 3 o'clock in the morning when I heard the noise.

Explanations: "Must have been" is the correct choice because it indicates a strong certainty that an event occurred based on evidence or logical deduction, which fits well with the context of hearing a noise at a specific time in the early morning.

Option Analysis:

Option A: "Couldn't have been" suggests impossibility, which is not indicated by the context. The speaker heard something and thus it must have happened.
Option B: "Can't have been" also implies impossibility, similar to Option A, and does not fit the context of hearing a noise.
Option C: "Must have been" conveys a strong certainty that aligns with the speaker's experience of hearing something at 3 o'clock in the morning. This is why it is correct.
Option D: "None of the above" is incorrect since Option C fits the context perfectly.

6. What is the correct sentence structure for asking a question using the modal verb 'will'?

Explanations: The correct sentence structure for asking a question using the modal verb 'will' is Subject + Will + Base Verb? . This follows the standard English interrogative structure where the auxiliary verb (in this case, "will") comes after the subject.

Option Analysis:

Option A: Correct. Subject + Will + Base Verb? is the proper structure.
Option B: Incorrect. The modal verb 'will' should come before the subject in a question.
Option C: Incorrect. The base verb should follow the modal verb 'will', not precede it.
Option D: Incorrect. The order of "Base Verb + Will + Subject?" does not conform to English interrogative structure.

7. Mom ..... be back soon. (Likely)

Explanations: "Will probably" indicates a high likelihood but not absolute certainty, which fits the context of "Mom ..... be back soon. (Likely)" well. This phrase suggests that while it is very likely Mom will return soon, there's still room for doubt or minor uncertainty.

Option Analysis:

Option A: Might - Implies low certainty, not fitting the context of high likelihood.
Option B: Will probably - Fits the context as it indicates a high but not absolute certainty.
Option C: Will - Implies absolute certainty, which is too strong for the given context.
Option D: None of the above - Incorrect since "will probably" fits well.

8. Complete the sentence with can('t), could(n't), or be able to in the correct form.I ..... believe my eyes when I saw someone was in the water.

Explanations: The sentence requires a modal verb expressing the speaker's disbelief at what they saw, indicating an action that was not possible in the past. "Could(n't)" is used to express inability in the past, making it the correct choice here. "Can't" refers to present impossibility and "wasn't able to" is more formal and less common in this context.

Option Analysis:

Option A: Incorrect. "Can't" implies an inability that would be true now, not just at the time of seeing someone in the water.
Option B: Correct. "Couldn't" expresses past inability to believe what was seen.
Option C: Less common and more formal; "could(n't)" is preferred here.
Option D: Incorrect. There is a correct answer among the options provided.

9. They ..... be brothers, they look alike!

Explanations: The sentence "They might be brothers, they look alike!" uses the modal verb "might" to express a possibility that is not certain but still plausible based on their appearance. This aligns with the correct answer D) Might.

Option Analysis:

Option A: Can - implies ability rather than possibility.
Option B: Are able to - also implies ability, not just possibility.
Option C: Couldn't - negates the possibility, which is incorrect here.
Option D: Might - correctly expresses a possible relationship based on their appearance.

10. He ..... buy a present for her. (50%)

Explanations: May is used to express possibility, indicating that something could happen but it is not certain. In the sentence "He may buy a present for her," it suggests that there is a possibility of him buying a present, which aligns with the context.

Option Analysis:

Option A: May - Correct answer as it expresses possibility.
Option B: Could - Also indicates possibility but less formal than "may." Not the best fit here.
Option C: Must - Implies necessity, which does not match the context of a possible action. Incorrect.
Option D: Might - Similar to could, it expresses possibility but is informal and less suitable than "may" in formal contexts. Not the best fit here.

11. The food is really good at that restaurant. They ..... have a great chef

Explanations: The sentence "They must have a great chef" uses the modal verb "must," which expresses strong certainty about a situation based on available evidence. In this context, the speaker is highly confident that the restaurant's food being good is due to having an excellent chef.

Option Analysis:

Option A: Can't - Incorrect because it uses 'can't,' which implies impossibility rather than strong certainty.
Option B: Must - Correct, as "must" conveys a high degree of certainty that the restaurant's good food is due to having an excellent chef.
Option C: All the above - Incorrect because not all options are correct; only "must" fits the context properly.
Option D: None of the above - Incorrect as "must" is the appropriate choice.

12. "We ..... consider all options before making a decision."

Explanations: "Ought to" is used when there's a sense of obligation, duty, or what is considered right or proper in a situation. In the context of making decisions after considering all options, "ought to" conveys that it is advisable and appropriate to do so.

Option Analysis:

Option A: Will - This implies certainty about future actions without consideration.
Option B: Might - This suggests possibility but not a strong recommendation or necessity.
Option C: Ought to - Correct. It indicates what should be done based on the situation's requirements and ethical considerations.
Option D: Can - This implies capability without addressing the advisability of taking an action.

13. ..... your brother drive a car? No, he is still learning.

Explanations: The sentence "No, he is still learning" indicates that your brother does not yet have the ability to drive a car. The modal verb "can" expresses ability, and since he is still in the process of learning, it means he cannot drive yet.

Option Analysis:

Option A: Can - This is correct because the sentence implies that your brother does not have the current ability to drive a car.
Option B: Can't - Incorrect as "can" is used here, and it's stated he can learn to drive but has not yet acquired this skill.
Option C: Must - Incorrect because "must" implies necessity or obligation, which is not indicated in the sentence.
Option D: Mustn't - Incorrect as there is no indication of prohibition or forbiddance in the sentence.

14. Don't wait for us.

Explanations: The modal phrase "don't wait for us" implies a possibility that the speakers might not arrive on time due to unforeseen circumstances, such as traffic delays. This aligns with Option B: "We might be late," which correctly suggests a potential delay in their arrival.

Option Analysis:

Option A: She might be stuck in traffic - This option refers to an individual and does not directly address the group's potential lateness.
Option B: We might be late - Correct, as it reflects a possibility of delay that justifies the instruction "don't wait for us."
Option C: There is a new restaurant we want to try - This option introduces a reason unrelated to potential lateness.
Option D: I might not go to the party tonight - This option refers to an individual and does not address the group's potential lateness.
Option E: You might get dehydrated - This option is unrelated to the context of waiting for a group.

15. I just saw Mathew and he looks really nervous.

Explanations: The modal "might" in this context expresses a possibility, not certainty. It indicates that Matthew could be going to his driving test but does not guarantee it. Therefore, the correct answer is A) He might be going to his driving test.

Option Analysis:

Option A: Correct. "Might" implies a possibility without certainty.
Option B: Incorrect. "Might go" suggests a future action but not necessarily the current state of Matthew's nervousness.
Option C: Incorrect. "Can't" negates any possibility, which is not indicated by the sentence.
Option D: Incorrect. There is a correct answer among the options provided.

16. Minsun didn't come to soccer practice. She ..... be sick.

Explanations: Minsun didn't come to soccer practice, and the sentence suggests a possibility that she might be sick. The modal verb "might" is used to express a low level of certainty about a situation, indicating that there is a chance but not a definite outcome.

Option Analysis:

Option A: Correct. "Might" appropriately conveys the possibility without asserting it as certain.
Option B: Incorrect. "Can't" implies certainty that she is not sick, which contradicts the given context of uncertainty.
Option C: Incorrect. This option suggests all options are correct, but only "Might" fits the context properly.
Option D: Incorrect. There is a correct answer among the choices provided.

17. Differentiate between "may" and "might" in terms of possibility. Which sentence shows a higher possibility?

Explanations: "May" and "might" are both used to express possibility, but "may" is generally considered more certain than "might". In the given options: - Option A: "It may rain today." suggests a higher degree of certainty compared to option B. - Option B: "It might rain today." indicates a lower level of certainty or a less likely event.

Option Analysis:

Option A: This sentence implies a slightly higher possibility of rain because "may" is used, which conveys a more certain likelihood.
Option B: This sentence suggests a lower possibility of rain as "might" indicates less certainty or a less likely event.
Option C: Both sentences do not show the same level of certainty; thus, this option is incorrect.
Option D: Since Option A correctly identifies the higher possibility, this option is also incorrect.

18. Chris ..... the race. He's a very strong athlete, but there are some other good competitors.

Explanations: The modal verb "might" is used to express a possibility, indicating that something could happen but it is not certain. In the context of the sentence, "Chris might win the race," suggests that Chris has a chance to win given his strength as an athlete, yet there are other good competitors which makes winning uncertain.

Option Analysis:

Option A: May know - Incorrect. This option does not relate to the context of the sentence.
Option B: Could see - Incorrect. This option is about perception and does not fit the context of winning a race.
Option C: Might win - Correct. This uses "might" appropriately to express possibility in the given scenario.
Option D: Might not catch - Incorrect. This phrase implies an action that is not relevant to the sentence's context about winning a race.

19. If Khoi said that, it ..... true. He never lies.

Explanations: The sentence "If Khoi said that, it must be true. He never lies." indicates a high level of certainty because the speaker asserts that Khoi is always truthful. The modal verb "must" in this context expresses necessity or certainty, which aligns with the statement that Khoi never lies.

Option Analysis:

Option A: Might be - This implies a possibility but not certainty, which does not match the level of certainty expressed by "must."
Option B: Must be - This matches the certainty implied by Khoi's never lying.
Option C: Can be - This suggests a possibility rather than a necessity, which is not as strong as the statement given.
Option D: None of the above - Since "must be" fits correctly, this option is incorrect.

20. Chennai ..... be very warm in summer.

Explanations: "Can" is used to express possibility in the present tense, indicating that something is possible now and can be expected under normal circumstances. In the sentence "Chennai can be very warm in summer," it correctly conveys that it is a possibility for Chennai to be very warm during the summer season.

Option Analysis:

Option A: Correct. "Can" expresses present possibility.
Option B: Incorrect. "Could" implies past or hypothetical possibility, not current reality.
Option C: Incorrect. "Is able to" is a phrase and not a modal verb for expressing possibility.
Option D: Incorrect. At least one correct option exists (A).

21. Fill in the blank:He ..... be the one who left the door open.

Explanations: The modal verb "might" is used to express a possibility, indicating that something could be true but it is not certain. In the sentence "He might be the one who left the door open," using "might" correctly conveys that there is a possibility, but it is not confirmed.

Option Analysis:

Option A: Could - Also expresses possibility, but "might" is more appropriate for less certain situations.
Option B: Would - Indicates obligation or prediction, which does not fit the context of expressing a possibility.
Option C: Might - Correctly conveys the possibility without certainty.
Option D: Should - Implies a recommendation or duty, which is not relevant here.

22. Which modals do we often use to talk about rules to say what you are allowed or not allowed to do?

Explanations: Can/can't is used to talk about possibility, not rules of permission or prohibition. Must and have to / don't have to are more appropriate for expressing rules and permissions in English grammar.

Option Analysis:

Option A: Incorrect. Can/can't refers to ability or possibility.
Option B: Correct. Have to / don't have to express necessity or permission.
Option C: Correct. Must expresses strong obligation or rule.
Option D: Incorrect. At least one correct option exists (B and C).

23. Mariana can't be at home.

Explanations: The sentence "Mariana can't be at home" expresses certainty that Mariana is not at home, indicating a high level of confidence in the statement. This aligns with option C: "I'm sure it's not possible," which conveys a strong belief or certainty about the impossibility of Mariana being at home.

Option Analysis:

Option A: Incorrect as it suggests absolute certainty, which is already conveyed by the original statement.
Option B: Incorrect because it implies uncertainty, whereas the original statement expresses a high level of confidence.
Option C: Correct as it accurately reflects the certainty in the original statement about Mariana not being at home.
Option D: Incorrect since option C is correct and covers the meaning of the original sentence.

24. I'm sure my parents have some savings.

Explanations: The modal "must" in option D) indicates certainty, which aligns with the speaker's confidence that their parents have some savings. This usage correctly reflects the level of certainty expressed in the original statement.

Option Analysis:

Option A: Might suggests possibility but not certainty, which doesn't match the level of certainty in the original sentence.
Option B: Can't indicates impossibility, contradicting the speaker's belief that their parents have savings.
Option C: Can is a possibility but does not convey the same level of certainty as "must" and thus is less appropriate.
Option D: Must conveys certainty, aligning with the original statement’s confidence in having some savings.

25. A:I heard that Junko has received a scholarship and will be able to attend the university in the fall. B:That's great news. She ..... very happy.

Explanations: The sentence "She must be feeling very happy" uses the modal verb "must," which expresses a high degree of certainty about the speaker's belief that Junko is experiencing happiness. This fits well with the context, as B's response to A's news suggests a strong likelihood of Junko being happy.

Option Analysis:

Option A: "Must be feeling" correctly conveys a high level of certainty about Junko's emotional state based on the given context.
Option B: "May be feeling" suggests a lower degree of certainty, which is less fitting for the strong positive news provided by A.
Option C: "Is feeling" does not use a modal verb and thus does not convey the necessary level of certainty implied in the context.
Option D: "None of the above" is incorrect since Option A is correct.

26. A:Let's be really quiet when we go into the baby's room. The baby ..... , and we don't want to wake her up. B:OK.

Explanations: The sentence "The baby might be sleeping" is the correct choice because it uses the modal verb "might," which expresses a possibility in the present or future. It indicates that there is a chance the baby could be asleep, but we are not certain.

Option Analysis:

Option A: This option suggests a simple probability without specifying tense or modality.
Option B: Correct. "Might" conveys uncertainty and possibility in the present or future, fitting the context of not wanting to wake the baby.
Option C: This implies past action with uncertainty, which does not fit the current situation described.
Option D: Incorrect as Option B is valid.

27. Sue doesn't drive. She ..... be a bus driver.

Explanations: Sue doesn't drive, which means it is impossible for her to be a bus driver. The modal verb "can't" expresses impossibility in this context.

Option Analysis:

Option A: Correct. Sue can't be a bus driver because she doesn't drive.
Option B: Incorrect. "Must" implies necessity, which is not applicable here since Sue cannot drive.
Option C: Incorrect. This option suggests all options are correct, but only A is accurate based on the given context.
Option D: Incorrect. At least one of the provided options (A) is correct.

28. That woman ..... be a doctor! She looks far too young.

Explanations: The sentence "That woman can't be a doctor! She looks far too young." uses the modal verb "can't" to express strong doubt about the possibility of the statement being true based on observed evidence (the woman's appearance). This aligns with the usage of "can't" as a modal of impossibility or strong negation.

Option Analysis:

Option A: Correct. "Can't" is used to express strong doubt or impossibility based on observed evidence.
Option B: Incorrect. "Must" implies certainty, which does not fit the context of expressing doubt about the woman's profession.
Option C: Incorrect. This option suggests all options are correct, but only A is accurate based on the sentence provided.
Option D: Incorrect. The sentence clearly indicates a possibility that can be negated with "can't" due to observed evidence.

29. A:I stayed up all night finishing this report for the boss. B:You ..... really tired.

Explanations: The modal verb "must" in this context is used to express a strong assumption about the state of the person based on observable circumstances (staying up all night). It implies that it is highly likely the person feels tired, but not with absolute certainty.

Option Analysis:

Option A: "Must feel" correctly conveys a high degree of likelihood without asserting absolute certainty.
Option B: "Might feel" suggests only a possibility and does not match the strong assumption implied by the context.
Option C: "Feel" is too weak; it doesn't capture the high probability suggested by the situation.
Option D: "None of the above" is incorrect since Option A fits well with the context.

30. Choose a, b, or c.A bear was trying to get into our tent. It ..... the food inside.

Explanations: The sentence "A bear was trying to get into our tent. It must have smelled the food inside." uses a modal verb that expresses certainty about something that happened in the past based on evidence or logical deduction. The phrase "must have" indicates a high degree of certainty, suggesting that the bear's action (trying to get into the tent) is directly related to its sense of smell detecting the food.

Option Analysis:

Option A: Correct. "Must have smelled" conveys a strong likelihood based on the context.
Option B: Incorrect. "Can have smelled" suggests possibility, not certainty.
Option C: Incorrect. "Could have smelled" also suggests possibility rather than certainty.
Option D: Incorrect. There is a correct answer among the options provided.

Frequently Asked Questions

What are modal verbs of possibility?

Modal verbs of possibility, such as 'can', 'could', and 'may', express the likelihood or ability to do something. They indicate what is possible in a given situation.

How are modal verbs used for permission and prohibition?

Modal verbs like 'can', 'could', 'may', and 'might' can be used to give or ask for permission. For example, 'You may enter the room.' Conversely, 'You cannot smoke here.' expresses a prohibition.

What is the difference between 'can' and 'could'?

'Can' is used for general abilities or permissions, while 'could' is often used to express a hypothetical situation or to make polite requests. For example, 'You can use my computer,' versus 'Could you please pass the salt?'

How do modal verbs of possibility differ from other types of modals?

Modal verbs of possibility, such as 'can' and 'could,' focus on what is possible or likely. They are distinct from other modals like 'must' (obligation) or 'should' (advice), which have different meanings and uses.

Can modal verbs of possibility be used in the past tense?

Yes, modal verbs like 'could' are often used to express possibilities or permissions in the past. For example, 'You could go to the party last night.' indicates a past possibility.

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