被动句
1) Joe’s father was seen to return after dark.
2) You are not allowed to smoke in the laboratory.
3) Effective measures should be taken to stop various forms of pollution.
4) When she was in Shanghai, the actress was heard to say she had long thought of the city as her second home.
5) The young man was seen to enter the building next to the bank.
6) After the minister of education had finished speaking at the press conference, he was made to answer all sorts of questions.
7) I don’t think Tom can be made to do what he dislikes.
8) The wind was heard to roar through the trees.
9) What should be done in a case like this?