I will lend you the book when I ( ) with it.

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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.
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.

I will lend you the book when I ( ) with it. I will lend you the book.I can remember who has borrowed it. _____ you return the book by Saturday,I will lend it to you. If you_ it ,I will lend the nove to you. I will lend you my book if you _________ it.A.read B.had rea If you ___________it,I will lend the book to you the day aft 1.I won't lend you the book until I ( ) reading it. I won't lend you the book before I have finished it. when will you ---------(finish)-------(read) the book?I----- If you_____ it, I will lend the novel to you.A. will read i will lend you money()you return it in time I don't like this book.will you lend me another book?那么我可以改成