Share Level 9b Grammar Review 2
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Which past modal is used to express disbelief/Impossibility?
could not have + past participle
Which past modal is used to express Possibility?
could/might/may + have + past participle
Which past modal is used to express logical conclusion?
must have + past participle
Which past modal is used to express regret over an action that was not taken?
Should have + past participle
Which past modal is used to express regret over an action that was taken?
Should not have + past participle
Right or wrong: He could have broke the window by accident.
Wrong – broke → broken
Right or wrong: She must have left early. The room is empty.
Right
She ____ studied more. That’s why she failed the test.
should have
I ______ left my phone at school. I can’t find it anywhere.
must have
They __________known the answer. It was never mentioned in class.
couldn’t have (disbelief | Impossibility)
He ________ taken the earlier train. Now he’s late.
Should have (he did not take the earlier train) REGRET
You ______ spoken to her like that. It was very rude.
shouldn’t have (you did & and it was very rude)
I’m not sure, but she ________ told the teacher about it.
could/might/may have
The lights are off. They _________ gone home already.
must have
He _______ been sleeping. He answered right away.
couldn’t have (it is impossible that he was asleep)
Error correction: She must not have forgot her keys at home.
forgot → forgotten
