不定式的完成时和进行时问题怎么比较好的区分,和维语动词比较有些地方我实在不知道先后啊to have known her is privilege,为什么是完成我觉得是特权肯定在被知道之前啊,there is no need to have bought

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不定式的完成时和进行时问题怎么比较好的区分,和维语动词比较有些地方我实在不知道先后啊to have known her is privilege,为什么是完成我觉得是特权肯定在被知道之前啊,there is no need to have bought
不定式的完成时和进行时问题
怎么比较好的区分,和维语动词比较有些地方我实在不知道先后啊to have known her is
privilege,为什么是完成我觉得是特权肯定在被知道之前啊,there is no need to have bought sth 看不出先后啊,you are too young to be meeting young men为什么进行是,哪里看出是同时发生的,能否告诉下窍门方法

不定式的完成时和进行时问题怎么比较好的区分,和维语动词比较有些地方我实在不知道先后啊to have known her is privilege,为什么是完成我觉得是特权肯定在被知道之前啊,there is no need to have bought
完成通俗上来讲指的是对现在的影响,她有特权是个事实,但是现在我才知道.
后面这个是固定句型 there is no need to do sth .= there is no need to have bought sth .
第三个句子是进行时标将来.你太年轻以至于不能去见那个男人.