题目内容：

My friend gave a pen to me yesterday.被动语态
give sb sth 被动语态还原to.这个是同义句咋变?buy a book for me 这个for被动时要还原吗?

优质解答

My friend gave a pen to me yesterday
——A pen was given to me by my friend yesterday.
-----I was given a pen by my friend yesterday.
buy a book for me
——I was bought a book
——a book was bought for me.