Why were there no buses yesterday? Maybe it was the snow or they must have/ might have / couldn't have been on strike.
might have
You must have / might have / can't have /seen her, surely! She was standing right in front of you.
must have
We (invite) so many people to our party! I'm worried that we won't have enough room for everyone. (past negative advice / regret)
shouldn't have invited
We (join) you at the restaurant, but we couldn't get a babysitter. (past willingness)
would have joined
Lucy (leave) earlier. She missed her flight. (past advice / regret)
should have left
I (eat) so much chocolate! I feel sick! (past negative advice / regret)
shouldn't have eaten
Luke (pass) the exam if he'd studied a bit more. (past possibility)
could have passed
You (be) rude to him. He's going to be really angry now. (past negative advice / regret)
shouldn't have been
You (take) this job. I can see you're not enjoying it. (past negative advice / regret)
shouldn't have taken
Our neighbours (cut) down the tree in their garden. It was a really beautiful tree. (past negative advice / regret)
shouldn't have cut
Andrew (go) to Cambridge University, but he decided to travel instead. (past possibility)
could have gone
They (be) kinder to me. They were absolutely lovely. (past negative possibility)
couldn't have been
I'm really cold! I (bring) my coat. (past advice / regret)
should have brought
