被动语态的构成:

be+vt.p.p.

中考要掌握的被动语态结构

1.一般现在时:　　 am／is ／ are +　 vt.p.p.

这个练习复习了哪几种被动语态的结构？

看以上的句子，小组讨论(4-6人),

归纳出被动语态的时态结构

1. The Great Wall _______　 (know) all over the world.
2. The subjects__________(study) in school.
3. The computer____________　 (invent) in 1976.
4. Two letters____________ (write) by Mary.
5. Your homework　 ___________　 ( must do) at once.
6. Library book ___________　　 ( may keep) for two days.

6.　　 write　 take

5.　　 build　　 keep

4.　　 become　　　 run

3.　　 beat

2．　 put　 　hurt

1.　　 pick　 live　 try　 stop

5.The dog must be kept at home.