主动语态改被动语态
问题描述：
主动语态改被动语态
1.All the people laughed at him
2.They made the bikes in the factory
3.His sister will give him a present for his birthday
4.I find English is very useful
5.We should allow the boys to play games
答
He was laughed by all the people.
The bikes were made in the factory.
He will be given a present for his birthday by his sister.(A present will be given to him for his birthday by his sister.)
English is found very useful by me.
The boys should be allowed to play games.