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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到过去的某个时间点,before在过去某个时间点以前

by the end of并不是都与过去完成时搭配 by the end of 是“到.末”的意思,后边跟不同的时间会有不同的含义和用法。 1、跟将来的时间,就用一般将来时,如 By the end of next month,I will finish reading this book.(到下个月末,我将读完这本书)...

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...

by+时间名词。意为:“到…时(已发生某事),此时谓语多用完成时;最晚、不迟于…,在…之前”。如:by now/then/this time/next Friday/the end of/three o`clock等。 By the end of last year,another new gymnasium had been completed.(2003上海...

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

by经常是与完成时联系在一起,具体什么完成时取决于by之后的时间,例如by 2013是过去完成时,by now是现在完成时,by 2015是将来完成时 by+时间”与动作性强的动词连用时,主句多用于完成式。by 后的时间可指现在、 过去或将来时间点。如: By t...

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

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.

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