下面三个英语句子,哪里错了?1.my car was broken down on the way ,so I was

1.my car broke down on the way ,so I was late for the meeting.
(break down 用主动语态)
2.he didn't finish his homework yesterday,so he was made to do it at once.
(在被动语态中,应为be made to do)
3.he's often asked to listen carefully in class,isn't he?
（'s是is的缩略形式,并不是完成时,此句意为,他上课总是被要求认真听讲,不是么?）