英语句子、、能帮忙变成被动语态吗?

题目

英语句子、、能帮忙变成被动语态吗?
1.He often gives us presents.
2.We should teach boys how to get on well with others.
3.Students often laugh at hi.
4.You can invite him to the party.

答案

1.presents are given to us by him.
2.Boys should be taught how to get on well with others.
3.He was often laughed at by the students.
4.He can be invited to the party.
答案来自nciku(n词酷)的提问吧