一、什么時候用被動語態

1.don't know who is doing the action.

2.don't care who dose the action.

3.委婉的說法

二、被動語態的構成

1.subject + is / was / will be / have or has been +pp +其他

① my hair is cut.

my hair is cut by Tonny.(如果想強調人的話可以用by xx)

② The cookies were eaten.

③ You article was read but I think you still need to rewrite it again.(比較委婉的說法)

I read you article but I think you still need to rewrite it again.(直接的書法，容易傷人)