not until 能用于过去完成时吗

not until 能用于过去完成时吗 since能用于过去完成时吗 not until在句首可以用过去完成时吗? not until和过去完成时过去完成时是加在not那边还是until后面新概念好像写了个I had not understood the problem until he explained it.但翻译是在他解释之前我不懂这个问题不是说not until是 直到……才吗 we didi not disturb him.(until)he finished work.we did not disturb him.(until)he finished work.改过去完成时... 强调句式It is not until...+that..只能用于时间吗,也就是until后只能跟时间吗?not可以省略吗? 下面这个句子中为什么要用过去完成时,有什么规律吗?Not until he had accomplished his mission did he realize that he was seriously ill. He did not leave his office until he had finished work这里从句为何用过去完成时? since+时间点可以用于过去完成时吗?可以举例? ever since主句 有用于过去完成时的例子吗 No,I did not 能用于回答吗? until...和not until... It was not until then that I came to know that knowledge ____only from practiceA.had come B has come C came D comes 请问It was not until 最好能翻译下句意思我觉得应该是现在完成时或是过去完成时,可为什么是D麻烦分析 not ...until not.until. 英语疑问（过去完成时）i decided not to buy anything until i had disembarked.解释为什么用过完 after必须用在过去完成时中吗?可以after she wrote the letter she went to the post office.用于过去完成时的词 when .after .as soon as .until .by that time这些词是否可以用在过去式中呢，最好请举个例子， not until的过去完成时有这样两个句子：1.The young man did not wake up until the bed had struck the ground.2.I had not understood the problem until he explained it.哪一个正确?具体讲讲原因呗.