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5 Cards in this Set
- Front
- Back
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Must + have + past participle |
We use When we are almost sure that something happenend or was true |
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Might / May + have + Past participle |
We use when think it is possible that something happenend or was true. We can also use could have with ths meaning |
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Can't + have + past participle |
We use when we are almost sure something didn't happen or that it is impossible. We can use couldn't have when the speculation is about the distant past. Can't is the opposite of Must
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Should have + past participle |
We use when we want to tell that somebody didn't do the right thing, or to express regret or criticism |
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Ought to + have + Past participle |
We use as an alternative to should have |
