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By 过去完成时

by在过去完成时翻译成 在……之前(介词)! 例句: By the time I went outside,the bus had already left. 我到外面去的时候,车已经开走了。 We had learned over two thousand English words by the end of last term. 到上学期末我们已经学了...

by the time有一种用法,表示“到。。。为止”,一般和完成时连用。 如I had finished my homework by the time my mother came back. 当我母亲回来的时候我已经完成了我的家庭作业。 当表示“。。。的时候”可以和when 互换。 如I will leave by th...

by the time引导的时间状语从句用一般时,主句用完成时或者一般时。如: By the time you get home tomorrow, it will be / will have been 9: 00 pm.. By the time he arrived at home, it was / it had been dark. By the time we got back fr...

现在完成时 1.表示过去发生的但对现在有影响的动作,可以不用时间状语。也可以和一些表示不定过去的时间状语连用,比如already,yet,ever,never,just,once,recently 等。 1). i have been to Peking many times. 我多次去过北京(现在对北京有所...

by the end of ... 到⋯末,比如: By the end of last month到上个月底(末),就是从上个月之前到上个月㡳,这就是过去的过去,也就是过去完成时。

by后面跟表示过去的时间, 句子就用过去完成时 by后面跟表示将来的时间, 句子就用将来完成时

都表示过去的过去的含义 主句的谓语的动作在从句谓语动词之前已完成 we had had supper before we went to the cinema. I had fininshed my homework by the time I went to bed.

by the end of ➕过去时间 表示“在过去的某个时间前,某个动作完成,所以用过去完成时” 如: I had finished my homework by the end of yesterday.

好像有三种情况,of后面加一般现在时,主句就用现在完成时 of后面跟的是一般过去式,主句就用过去完成时 of后面跟的是一般将来时,主句也用一般将来时

观察相关动作是否有时间状语,如出现 by+过去时间,所修饰的动作一般用过去完成时。 观察语境,特别是句中其他动词所用时态,分析题中是否有动作发生在“过去的过去”,以及语境是否强调了这个先后关系。注意,有时虽有过去动作先后发生,但是不强...

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