I will lend you the book when I ( ) with it.A. have done B. am doing C. will have done D. do选哪个答案,并说明理由.
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I will lend you the book when I ( ) with it.A. have done B. am doing C. will have done D. do选哪个答案,并说明理由.
I will lend you the book when I ( ) with it.
A. have done B. am doing C. will have done D. do
选哪个答案,并说明理由.
I will lend you the book when I ( ) with it.A. have done B. am doing C. will have done D. do选哪个答案,并说明理由.
I will lend you the book when I ( ) with it.A.have done B.am doing C.will have done D.do
选哪个答案,并说明理由.
答:A译:我看完后就把这书借给你.
析:在时间和条件状语从句中用现在时表示将来,排除C现在时包括了一般现在时,现在进行时和现在完成时.这里用have done with it最佳,表示“已经看完了”.
B.when I am doing with it.表示“在我正在看的时候”(借给你),不合逻辑.when I do with it.也表示“当我看的时候”(借给你),也不对.只有“when I have done with it" ,“当我看完它的时候”(借给你),才合乎生活逻辑.
有些短暂性动词,一般现在时和现在完成时在时间和条件状语从句中都可以,只有一些细微的区别,如:
Don't get off the bus until it stops.
公交车不停不下车.
Don't get off the bus until it has stopped.
公交车不停稳(完全停下来)不下车.
“主将从现”,这个“从”是指“时间和条件状语从句”,不要推广到所有的从句!
比如:I don't know when he will come.这个when he will come是宾语从句.
这个“现”是指现在时态,包括一般现在时,现在完成时,现在进行时,不要只限于“一般现在时”.
比如上例:Don't get off the bus until it has stopped.及本题句.