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1、状语从句练习易混引导词while, when, as的区别:1.when既可以指时间点,与瞬间动词连用,也可以指时间段,与延续性动词连用(=while)。如:When he came in, his mother was cooking.When (While) we were at school, we went to the library every day.While表示时间段,因此,while 从句的谓语动词要用延续性动词。如:Please dont talk so loud while others are working.As与when用法相似,但着重强调主句动作与从句动作同时发
2、生,有随着或一边一边之意。如:As you get older, you get more knowledge.随着年龄的增长,你获得的知识就越多。2Because,as,since 的区别:Because用于表示直接原因,回答why提出的问题,语气最强;As用于说明原因, 着重点在主句,常译成由于;since表示显然的或已知的理由或事实,常译成既然。如:Water is very important because we cant live without it.He didnt come yesterday as his mother was ill.Ill do it for you s
3、ince you are busy.3suchthat, sothat, so that 引导结果状语从句的区别:such是形容词,修饰名词; so 是副词,修饰形容词或副词。其结构如下:1) such + a (n)+ 形容词+单数可数名词+that2) such+形容词+复数可数名词+that 3) such +形容词+不可数名词+that。如:This was such a good film that I went to see it several times.It was such good books that they sell well.It was such bad wea
4、ther that I had to stay at home.He spoke so fast that I couldnt follow him.He is such a lovely boy that we all like him.=He is so lovely a boy that we all like him.注:在形容词+可数名词复数/不可数名词结构中,当名词前有many, much, few, little表示数量的多少时,名词前用so。如:She made so many mistakes that she didnt pass the exam.【实例解析】1.You
5、will stay healthy _ you do more exercise, such as running and walking.A. if B. how C. before D. where答案:A。该题考查的是引导状语从句的从属连词的选择。从意思上看,从句应是一个条件状语从句,在这四个选项中只有if能引导条件状语从句,所以选A。2. -Shall we go on working?-Yes, _ I prefer to have a rest.A. when B. if C. because D. though答案:D。该题考查的是引导状语从句的从属连词的选择。从意思上看,只有选
6、though才能说得通。3.None of us knew what had happened _ they told us about it.A. when B. until C. after D. though答案:B。该题考查的是引导状语从句的从属连词选择。本句的意思是“在以前我们没人知道这件事。”要表达着一意思应用“notuntil” 这一句型。4.-I hope youll enjoy your trip, dear!-Thank you, mum. Ill give you a call _ I get there.A. until B. as soon as C. since D
7、. till答案:B。该题考查的是引导状语从句的从属连词的选择。本题的意思是“一到那里,我就给你打电话。”要表达这个意思应选用as soon as。一、选择合适的连接词,完成下列句子。1.Jim spends a lot of money on books_he is not rich.2.Kate fell into sleep _she was listening to the music.3.-Is David at school today? -No. He is at home _he has a bad cold.4.We wont have supper _my mother c
8、omes back.5.Speak to him slowly _he may understand you better.6. _ she doesnt come on Sunday, Ill go fishing by myself.7.It is four years _I had left that small village.8. _the air moves, it is called wind.9.We will go to the park _it doesnt rain tomorrow.10._little boys did _much work.11.There are
9、few new words in the passage _we cant understand it.12.Go back _you come from.13.He reached the station _the train had left.14.-Do you have a swimming pool? -No, we dont. At least, not _big _yours.15.Give me your paper _you have finished it.16.It is raining hard, _we have to stay at home.17. _you wo
10、rk harder, youll never pass the final exam.18.Look after te children _I am out.19.The village is _far away _I cant get there on foot.20.That is _an interesting book _I cant stop reading it.二. 单项填空1. _ hes old, he can still carry this heavy bag.A. Though B. Since C. For D. So2. -Do you know if he _ t
11、o play basket ball with us?-I think he will come if he _ free tomorrow.A. comes; is B. comes; will be C. will come; is D. will come; will be3. In the zoo if a child _ into the water and cant swim, the dolphins may come up _ him.A. will fall; to help B. falls; to helpC. will fall; help D. falls; help
12、ing4. I dont remember _ he worked in that city when he was young.A. what B. which C. where D. who5. We will stay at home if my aunt _ to visit us tomorrow.A. comes B. come C. will come D. is coming6. The police asked the children _ cross the street _ the traffic lights turned green.A. not; before B.
13、 dont; when C. not to; until D. not; after7. I was late for class yesterday _ there was something wrong with my bike.A. when B. that C. until D. because8. Ill go swimming with you if I _ free tomorrow.A. will be B. shall be C. am D. was9. In the exam, the _ you are, _ the _ mistakes you will make.A.
14、 careful; little B. more careful; fewestC. more careful; fewer D. more careful; less10. You should finish your lessons _ you go out to paly.A. before B. after C. when D. while11. I hurried _ I wouldnt be late for class.A. since B. so that C. as if D. unless12. When you read the book, youd better make a mark _ you have any questions.A. which B. that C. where D. though13. The teacher raised his voice _ all the students could hear him.A. for B. so that C. because D. in order