you must hand in your homework now 改为被动语态

your homework must be handed in now
the car was bought last year

your homework must be handed in now.
the car was bought by me last year.

被动,就要翻译出"被"的意思,比如说:
你的作业,现在必须被交.
这车去年被我买了.

1.Your homework must be handed in now.
2.The car was bought by you last year.

1.Your homework must be handed in mow.
2.The car was bought by me last year.

1. your homework must be handed in now
2. the car was bought last year

1：your homework must be handed in by you now.
2:the car is bought by me last year.