Lesson 1 - Grammar - FILM AND THEATRE - Page4

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Now look at these situations that happened in the past and speculate about them. Use must have when you’re almost sure something happened or can’t have when you feel it was not possible for something to happen.


1. Tom walked past me and didn’t say anything. He .............. seen me.

must have

can't have

2. Did you hear that noise at midnight? They ....................had a party.

must have

can't have

3. You didn’t study at all and you passed the exam? It ................. been difficult.

must have

can't have

4. I can’t find my mobile phone. I .........................left it in my office.

must have

can't have

5. He didn’t do what I wanted. He ................. understood my instructions.

must have

can't have

6. I can’t believe this is true. You ............ be joking!

must

can't

7. When we got up this morning, the TV was on. We ...................forgotten to turn it off last night.

must have

can't have

8. I haven’t seen Josh for a long time. He .................. gone back to the US.

must have

can't have

9. They knew everything. They .............. listened to our telephone conversations.

must have

can't have

10. It’s too quiet. She ................. be playing computer games now.

must

can't

11. That person in the lecture hall? It .................been Peter. He was on holiday then.

must have

can't have

12. I didn’t hear the phone. I ................ been asleep.

must have

can't have


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