三、状语从句：
一）.条件状语从句：引导词为:if, unless。
形式：
主句_______________, 从句______________.
练习：
1.I am waiting for my friend.____________, I’ll do shopping alone.
A.If she comes B.If she will come C.If she doesn’t come D.If she didn’t come
2.I am sure I can make it better, if our teacher _________me a second chance.A.give B.gave C.gives D.will give
3.The art club is for members only. You can’t go in___you are a member. A.unless B.Because C.if D.though
4.I ________the CDs to you if I have time tomorrow. A.will return B.returned C.have returned D.return
5. 1）You won’t pass the final exam ___________(除非)you work hard.
2) The children __________ climb the mountain if it __________________(不下雨)
3) _______________________if he comes. (给我打电话）
二）时间状语从句：(常见从属连词有when,before, after, until, as soon as, while…)
1）As soon as he _____in Paris, he will call you. A.arrive B.arrived C.arrives
2）Don’t leave until the rain_______.A.stopped B.stops C.stopping D.stop
3）You can go skating after you ____A.finish the job B.finished the job C.finishing the job
4) I’ll tell her the good news when he _____ back. A.came B.comes C.come
5）Father was watching TV ________ Mum was washing dishes. A.before B. while C.after D.until
6）I was watching TV ____ you called me last night. A.when B.while C.until D.after
7) I ______ here since I came to China. A.lived B.have lived C.am living D. had living
8).My grandma didn’t go to sleep______ I got back home. A.till B.until C.since D.when
三）原因状语从句： (常用连词有because, since, as)
1. Tom is ill at home, _____he can’t come here. A.so B.if C.because D.and
2.—Why did you come to school late this morning?--___I watched the Football World Cup until 12:00 last night. A.If B.Because C.Since D.Though
3.I hope to go to France some day__there are many museums there.A.though B. unless C. because D. where
本文来源：http://www.010zaixian.com/shiti/691982.htm