UC知道You needn‘t have come in person. 你当时不必亲自来的
来源：百度知道 编辑：UC知道 时间：2024/07/01 13:52:26
为何用完成式
若要谈论过去情况，应在其后接动词完成式。
如：Need you have paid so much？
选我！！
来这个动作是在过去的时候完成的
所以用完成式
这句话是事件在动作完成后说的，所以用完成时
you ____ miss the lecture,though you needn't have it.
'You needn't have said that,' my wife answered.
You needn't have given the car a wash.这句话什么意思，什么结构．
needn't have done还是didn't have done
There is___sugar.You needn't go to buy any.
you needn't _____(work) late tonight.
Didn't need to do还有 needn't have done的区别
You shouldn't have
There was plenty of time.She _____ A.mustn't have hurried B.needn't have hurried
can't you com in and have tea now.中can't表示什么意思?