b,you needn't have told him 首先,你先理解第一句,意思是我昨天已经告诉他了这个消息,然后你再看最后一句,意思是他已经从其他人那里得知了这个消息,所以你没有必要告诉他,而前者已经告诉了他,所以要用完成时,没有必要做某事（表示已经做了某事）用needn't have done sth(注意情态动词的用法,像不可能做了某事用couldn't have done sth等等）
希望采纳哈!
-i told him the news yesterday.
-i told him the news yesterday.
-____.he had already picked it up from others.
a.you needn't tell him
b.you needn't have told him
c.you didn't need to tell him
d.you don't have to tell him
请问为什么是C?
-____.he had already picked it up from others.
a.you needn't tell him
b.you needn't have told him
c.you didn't need to tell him
d.you don't have to tell him
请问为什么是C?
英语人气：701 ℃时间：2020-03-21 21:28:06
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