Exercise
2
(éksersais tu)
In this exercise you will practice using modal verbs to express present probability: must, can’t, could, may, might.
1. Look at that guy’s enormous muscles. He work out a lot.
2. Michelle not participate in the parade. It depends on how much time she has next week.
3. She used to live in this town years. She still remember some directions, depending on her memory.
4. Man! I'm so tired. I really use a cold glass of water.
5. You be right, but I’m going to check to make sure.
6. You just drank two bottles of water! You have done some serious work to be that tired!
7. you make sure that the door is locked? I have forgotten to lock it.
8. He’s working full-time and studying for his Ph. D. That be easy.

Audio 69 |
MODAL VERBS OF DEDUCTION - II |
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Must have, can’t have: expressing past probability |
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Structure: modal + have + verb past participle must have done, can’t have done, must have visited, can’t have visited, etc. |
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that we feel sure that something was true in the past. See the examples: We use can’t have + verb (Past Participle) to say we are sure that something was impossible. See the examples: |
heard you had won the raffle. b. Oh, no! Where’s my bike? c. Someone must have stolen it! a. I can’t have left the paper bag in the supermarket. I had it on the bus on the way home. b. John can’t have been in the park the previous day. He has gone to Greece. |