2018-2019学年外研版高一英语必修4教学课件:Module 6 Grammar
2018-2019学年外研版高一英语必修4教学课件:Module 6 Grammar第3页

Read the sentences and discuss on what condition we can use them.

Leading-in

1) They might have killed each other. 2) He must have known the news. 3) You should have come here yesterday. 4) We could have worked out the problem.