帮我把下列英语句子改成被动语态形式的1.They are making machines in that factory.2.How many desks will they buy next term?3.I have asked her to help you.4.She will send me a nouel next week.5.The story made us laugh.6.We saw them coming over.7.We saw the man fall off the horse.

Machines are made(by them) in that factory.
How many desks will be bought (by them)next term?
She has been asked to help you(by me)
A nouel will be sent to me (by her) next week.
We were made to laugh by the story
They were seen (by us) coming over.
The man was seen (by us )to fall off the horse.
注意make sb do sth，或者 hear/see sb do sth的结构在变成被动的时候要加 to，既 sb be made to do sth或者 sb be heard/seen to do sth

1.Machines are being made by them in that factory.
2.How many desks will be bought by them next term?
3.She has been asked to help you by me.
4.I will be sent a nouel by her next week.
5.We were made to laugh by the story.
6.They were seen coming over by us.
7.The man was seen to fall off the horse by us.