I was in a hurry to get to work and now I can't find my purse anywhere. I ........ it at home.
(Very probable - Speaker can't think of another option.) may have left must have left could have might have left.
I don't feel well and I've got a terrible stomachache. I ...... something bad.
(Very probable - Speaker can't think of another option) may have eaten can't have eat must have eaten could have eaten.
-Is Sheila in? I want to show her what we have bought.
-I'll have a look. She is not here now, but she ................ very far because her rucksack is on her bed.
(Certainty - Speaker is sure) can't have gone couldn't have gone must have gone may have gone.
The criminals ..... through the window. It's open.
(Fairly possible, but not certain - There is reasonable evidence, i.e. the open window, that suggests the criminals escaped through the window, but there were no eye witnesses and there is no real proof.) can have escaped can't have escaped must have escaped may have escaped.
You ..... him this morning. He is in Paris.
(Certainty - Speaker is sure) may not have seen couldn't have seen might have seen mustn't have seen.
Did you hear the bell ring? That ..... the post man, although he usually comes later.
(Small possibility) might have been should have been must have been can have been.
You didn't want to go to the cinema with your friends and now you are bored at home.
I wish I .... to the cinema. went had gone would go may go.
You have overslept and now you are late for work.
I ..... to bed so late last night. shouldn't have gone shouldn't go may have gone might have gone.
You are ashamed because you forgot your money and you can't pay for your shopping.
If only I .... my money. hadn't forgotten didn't forget wouldn't have forgotten couldn't forget.
I had a big evening meal and now I have a terrible stomachache.
I .... so much. shouldn't have eaten should have eaten may have eaten might have eaten.
You live by yourself in Austria but you would like to live with your boyfriend in Italy.
I wish I ..... in Italy. live had lived lived would live.
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