题目内容

17.I will tell you the good news as soon as you _______ back.(  )
A.comeB.cameC.are comingD.will come

分析 你一回来我就会告诉你这个好消息.

解答 答案:A.
as soon as表示一…就…,引导的时间状语从句,遵循主将从现的规则,从句主语you,故答案是A.

点评 as soon as 的用法一般是两种情况:
1、指未发生的动作,规律是:主句一般将来时,从句用一般现在时代替一般将来时
如:I will tell him the news as soon as he comes back.
注:有时,为了特意表达刚刚完成某事就如何如何,需要用现在完成时.
如:I will go with you as soon as I have washed my face.
2、指紧接着发生的两个短动作,主从句都用一般过去时
如 He took out his English books as soon as he sat down

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