状语从句语法复习

高二英语语法复习状语从句定义：用作状语的从句叫做状语从句。引导状语从句的关联词是一些从属连词。 eg： When you cross the road, you must be careful. 当你过马路时要小心。（when是从属连词） I was late because I missed the bus. 我迟到了，因为我误了公共汽车。（关联词是从属连词because）. If she asks me, Ill tell her. 她如果问我，我就告诉她。（关联词是从属连词if） You look as if you need a rest. 你像是需要休息似的。（关联词是从属连词as if）.结论：从上面的例子可以看出，状语从句的位置比较灵活，有时可以放于句首，有时可以置于句末。状语从句位于句首时，其后常用逗号与后面的句子隔开。分类：状语从句可以根据其用途分为时间状语从句、地点状语从句、原因状语从句、结果状语从句、程度状语从句、目的状语从句、条件状语从句、让步状语从句及方式状语从句1. 时间状语从句引导时间状语从句的关联词常有：after, before, when, while, whenever, as soon as, as, since, until等。eg. The ball goes up very high after it hits the ground. 这球着地后蹦得很高。 Wait until youre called. 你等着叫你吧！ When he came, I was cooking. 他来时，我在做饭。 Ill call you as soon as I come back. 我一回来就给你打电话。 Before they came back, we had finished the work. 他们回来前，我们已经完成工作了。 We havent seen each other since he left. 从他离开后我们没见过面。2. 原因状语从句原因状语从句通常由because, as, since等词引导 because语气较强，用以回答why问句 as语气较弱，较口语化，所表示的原因较明显 since语气较弱，常表对方已知的事实，相当于汉语的“既然” eg. I eat potatoes because I like them. 我吃土豆是因为我喜欢土豆。 As I didnt know the way, I asked a policeman. 我由于不知道路，因而问警察。 Since you wont help me, Ill ask someone else. 你既然不帮我，那我就请别人帮我。3. 结果状语从句 结果状语从句常用so- that, such -that等关联词引导eg. He is so young that he cant go to work. 他如此小以致于他不能上班。 He got so little pay that his family had to live on welfare money.他工资很少，他的家人不得不靠救济金生活。 Its such a good chance that we mustnt miss it. 机会这样好，我们决不能失掉。4. 目的状语从句目的状语从句常由so that, in order that等词引导，目的状语从句常用助动词may（might）, shall（should）, will（would）, can (could)。目的状语从句常放于主句之后eg. Speak clearly so that they may understand you. 你要讲得清楚，他们才听得懂。 He spoke slowly in order that everyone should understand. 他讲得很慢以便人人能听懂。5. 条件状语从句 条件状语从句表示条件，关联词常用if或unless, as (so) long as.eg. If it snows tomorrow, we will build a snowman. 明天如果下雪，我们就堆雪人。 Youll catch a cold unless you put on your coat. 你会感冒的除非你穿上大衣。 He will do anything as long as it is interesting. 只要有趣，他什么都愿意干。6. 让步状语从句让步状语从句，表示“虽然，尽管，即使”等概念，常用的关联词有：though, although, even though等。eg. Though he was ill, he was still working. 他虽然有病，但仍然继续工作。 Although it is difficult, we shall do it. 此事虽难，但我们还是要做。 Even though you say so, I do not believe it. 即使你这样说，我也不信。注意： though和although可以互换，只是although比较正式。 though不可以与连词but连用，但可以与yet，still连用eg. Though he worked hard, he couldnt pass the exam.虽然他很努力，但还是没通过考试。 7. 比较状语从句 比较状语从句常用than或asas引导，than表示两者的比较，asas表示程度相比较eg. He is taller than I. 他比我高。 That book is more interesting than this one. 那本书比这本有趣。 He runs as fast as I （do）. 他和我跑得一样快。 He is older than me. 他年纪比我大。注意： 比较状语从句后面的主语在口语中常用宾格。 如果后面的句子主语为主格时，可以加助动词、情态动词等。eg. He can jump higher than I can. 他能比我跳得高。 He came later than LiLei did. 他比李磊来得晚。8. 注意： because of和because的区别 because of后加名词代词或动名词，不加句子，而because加句子 eg. Because of his illness, he didnt go to work. Because he was ill, he didnt go to work. 在条件, 时间 ,让步状语从句中，如果主句用将来时，从句常用一般现在时 eg. If it doesnt rain, well go fishing. As soon as he comes back, Ill let him know it. if构成条件从句时意为“如果”，可放句首也可放主句后；构成宾语从句时意为“是否”，一般放主句后。 eg. I dont know if he will come tomorrow.（宾从） 我不知道他明天是否来。 If he comes, Ill tell you.（Ill tell you if he comes.）如果他来，我会告诉你。 【模拟试题】 1. If he _harder next time, he will catch up with us. A. work B. worked C. works D. will work2. I think WeiHua will be very happy when she _your presents. A. looks B. will look C. receives D. will receive3. Well set out as soon as our monitor _. A. come B. come C. will come D. has come4. Ill go with you if it _fine tomorrow. A. has beenB. is C. will be D. be5. Ill meet him at the station when he _.A. will return B. return C. returns D. returned6. I wont go to see the film tonight, because I _ my ticket. A. lost B. have lost C. will lost D. didnt have7. Are you going to visit the farm tomorrow? Yes. But if it _, well stay at school. A. rain B. rained C. rains D. will rain8. Please dont stand up in class until you _.A. were told to B. are told to C. were told D. are told9. They wont be back until the work _. A. do B. does C. is done D. will do10. Xiao Ming will come and play with me if he _busy. A. isB. wont be C. isnt D. will be11. I will let you know about it as soon as I _the news. A. will get B. get C. got D. get12. Though he is ill, _he is still working hard. A. but B. yet C. too D. either13. He was late _ the heavy rain. A. because B. because of C. though D. if14. He is _ excited that he cant speak any thing. A. too B. to C. so D. enough15. The boy is _ lovely that we all like him. A. so B. such C. too D. very16. This is _ an interesting book that I want to read it again. A. so B. such C. quite D. very17. He got up early _ he could catch up with the others. A. in order to B. to C. so that D. that18. Our school is _yours. A. as three times large as B. as large three times as C. three times as large as D. as large three times as19. I wonder if he _. If he _, Ill ask him to drive me there. A. comes, comes B. come, come C. will come, comes D. come, will come3