They　 spoke　 　English .(主动语态))

English　 was spoken　 by them

主语+及物动词+宾语.(主动语态)

主语 +be+p.p + by +宾语. (被动语态)

7．The water is polluted.

6．The trees were cut.

5．Light　 invent　 by

　 The light was invented 　by Thomas Edison .

4．be used for　 keep off　 the rain

The umbrella is used for keeping off the rain

3．Build　 by

　 The Great Wall was　 built　 by Chinese people.

2．Play　 All over the world

　　 Football is　 played all over the world.

1．The little boy　　 should　 take good care of

　　 The little boy must be taken good care of

3.情态动词: must／can／could／may…

　　　　　　　　　　 + be +　 vt.p.p.

2.一般过去时:　　 was／were +　 vt.p.p.