You may not go out until your work is done.
這句話若要改成before連接句子怎么改?
You may not go out___your work is done.
A.before B.until C.where D.as
請問下面的
Before your work is done,you may not (can not)go out.這里的before從句必須放前面嗎？
如果可以放后面,那這道題的答案不就是A,B了？有沒權(quán)威點的語法解釋啊。
找到一個比較權(quán)威的語法解釋:
希望對以后有同樣問題的人有用:
不少的語法書上說，before引導(dǎo)的從句習(xí)慣上不與否定的主句連用，要用until。實際上二者都可以，有時在意義上有些區(qū)別。試比較：
He didn't arrive until I returned.直到我回來時他才到達(dá)。
He did not arrive before I returned.在我回來之前他尚未到達(dá)。
I didn't manage to do it until you had explained how.直到你解釋了如何干，我才設(shè)法完成了那項工作。
I didn't manage to do it before you had explained how.你解釋了如何干之后，我才設(shè)法完成了那件工作。