现在完成时和过去完成时一般的意思是什么 have done和had done的意思
现在完成时和过去完成时一般的意思是什么 have done和had done的意思
have done和had done的区别
had done 是过去完成时,have done是现在完成时,那have been和had been呢?be不是动词呀
sth.done 和 have sth.done 的意思和区别!
过去完成时是had+done为什么在什么情况下had都不用变.而现在完成时的助动词有have和has
have done 和 had done 和since的搭配
should have done .would have done. must have done三者之间的意思和用法上
have done和have been done的用法是什么?
have sth done 的过去完成时?
happen to have done sth 和pretend to have done sth 的中文意思
shouldn't have done和wouldn't have done的意思
have done 和 had done区别