Fill in the spaces with must or might and the correct form of the same verb as the sentence before.

Choose the correct option for these modal verbs of possibility. 

1. He left the meeting early.

a) He must have to work tomorrow.
b) He must to have to work tomorrow. 

2. He has to be finished the project by now.

1. He must be finished the project.
2. He might be finished the project.

3. There is new snow outside.

a) It might have snowed last night.

b) It must have snowed last night.

4. He didn't finish the deadline on time.

a) He might not had completed the project on time.

b) He might not have completed the project.

5. She doesn't know if she will cook lunch today.

a) She might cook lunch. 

b) She has to cook lunch.

6. Everyone is smoking outside.

1. You could not be able to smoke in here.
2.  You must not be able to smoke in here.

7. He looks very bored.

a) He must have not liked the show tonight.

b) He might had liked the show.

8. Everyone received 100% on the English exam.

a) It must have been easy.

b) It could have been easy.

9. That book has his name on it.

a) It has to be his.

b) It might be his.

10. Who fixed the door?

a) It couldn't been Tom. He was at work.

b) It couldn't have been Tom. He was at work.

II. Fill in the spaces with must or might and the correct form of the same verb as the sentence before.

1. Perhaps she will go to the party tonight. She ____ might _____ go to the party tonight.
2. He worked all day. He ________ must ________ tired.
3. Maybe she is at work. She _____ might __________ at work.
4. He definitely knows how to fix my bike. He _______must ___ how to fix it.
5. They are not sure if they will come. They ___ might ___ to class tomorrow.
6. They know my teacher for sure. They ______ must ________ my teacher.
7. I don't know if I will go to see a movie tonight. I ___ might __to see one.
8. Everyone is wearing a thick jacket. It ___ must ______ cold outside.
9. She might be at home, or she ______ might ____ at the office.
10. Maybe I will have dinner late tonight. I _____ might ______ dinner late.

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