请问下过去完成时的用法have you been there?yes ,i have just been there.i had never been there before.请问i have just been there.为什么这句不能用过去完成时而后句又为什么要用过去完成时?
问题描述：
请问下过去完成时的用法
have you been there?
yes ,i have just been there.i had never been there before.
请问i have just been there.为什么这句不能用过去完成时
而后句又为什么要用过去完成时?
答
过去完成时的标志是助动词had+过去分词.最大特点是必须有一般过去时相对应.既:没有一般过去时就不会有过去完成时,因为过去完成时表示动作发生在过去的过去.(除非有时用于虚拟语气中)例:Ihadfinishedmy
homeworkbeforehecame.
多看看语法书吧.做点题.好学的!