主动语态与被动语态相互转换
A.改为被动语态
1. We call maths the language of science.
Maths _____the language of science.
2. Where did they plant trees?
Where ______ trees ______?
workers built the Green Great Wall across the northern part of the country.
The Green Great Wall ________ across the northern part of the country.
4. The teacher made the students copy the text.
The students ______________ copy the text.
5. They produce silk in Suzhou.
Silk _________ in Suzhou.
built a bridge between the two islands lastyear.
A bridge __________ between the two islands lastyear.
B.改为主动语态
7. A birthday party will be had tomorrow.
We ______a birthday party tomorrow.
was seen to cross the street just now by someone.
Someone saw John _____the street just now.
another way be thought of to keep your wine or water warm?
Can ________ another way to keep your wine or water warm?
many trees are still being cut down in the USA.
___are still____ down too many trees in the USA.
答案：
called , planted built
made to 5. is produced 6. was built
7. will have 8. to cross 9. you think of
10. People/They , cutting
