原因状语从句

1、一.原因状语从句,二.结果状语从句,三.练习题,姚霞飞,孟丹丹,张志艳,1.定义：说明主句原因的句子叫原因状语从句,2.时态：原因状语从句一般都是根据实际情况选用适当的时态。通常是主过从过，主现从现。,3.常用引导词: because (因为), since (既然), now that(既然), as (由于), for(因为）,4.because，since和as的区别：,1）because“因为”，表示直接的原因，语气最强。 why提问的句子，必须用because回答。,eg:I stayed at home because it rained.,2) since引导的原因状语从句一般放

2、于主句之前表示已知的、显然的理由(通常被翻译成“既然”= now that），较为正式，语气比because弱。,eg: Since you dont trust him, you should not employ him.,eg: Now (that) you are grown up, you should not rely on your parents.,3)as引导原因状语从句时表示附带说明的“双方已知的原因”，含有对比说明的意味，语气比since弱，较为正式，位置较为灵活(常放于主句之前),eg：As it is raining, youd better take a taxi.

3、,4)for引导的是并列句，表示原因，但并不说明主句行为发生的直接原因，只提供一些辅助性的补充说明，for引导的并列句只能放于主句之后并且必须用逗号将其与主句隔开。,返回,eg：He seldom goes out now, for he is very old,1.定义：在句中用来作结果状语的句子叫结果状语从句。,2.常用引导词: so that (如此以致), such that (如此以致),3.时态：结果状语从句一般都是根据实际情况选用适当的时态。也通常是主过从过，主现从现。,4.结果状语从句的句型：,结果状语从句的从句部分是补充说明主句中谓语动词发生的结果的，通常位于主句之后。结果从

4、句中通常不用情态助动词，但must, can, could除外。结果状语从句其规律由so与such的不同词性决定。such是形容词，修饰名词或名词词组，so是副词，只能修饰形容词或副词。so还可与表示数量的形容词many,few,much,little连用，形成固定搭配 。,1) so + 形/副+ that 从句,eg:The boy is so young that he cant go to school.,2) so + many/few（+复名）+ that从句,eg: There are so many picture-story books that the boy wont l

5、eave.,3) so + much/ little（+ 不可数名词）+that从句,eg：He gave me so little time that it was impossible for me to finish the work on time.,4) so+ 形+ a/an+ 单名+ that从句,eg：It was so hot a day that they wanted to go swimming.,5) such+ a/an+ 形+单名+ that从句= so+ 形+ a/an+单名+ that从句,eg：He is such a young boy that he c

6、ant go to school. = He is so young a boy that he cant go to school.,6）such+形+复名/不可数名词+that从句,eg：They are such fine teachers that we all hold them in great respect,返回,5、结果状语从句与简单句的转换：,1) so that (从句为肯定句) = 形/副 + enough + (for sb.) to do sth,eg：He is so old that he can go to school alone. = He is old

7、enough to go to school alone.,2) so that (从句为否定句) = too + 形/副 + (for sb.) to do sth.,eg：The problem is so hard that I cant work it out. = The problem is too hard for me to work out.,1. _ youve got a chance, you might as well make full use of it. A. Now that B. After C. Although D. As soon as,解析：主句与从

8、句之间存在因果关系，且“youve got a chance”表示一个显而易见的原因，因此应选用表原因的now that。,2.He found it increasingly difficult to read, _ his eyesight was beginning to fail. A. and B. for C. but D. or,解析：“his eyesight was beginning to fail”是“he found it increasingly difficult to read”的原因， 因此本题应选用可以表示原因的连词for引导原因状语从句。,3.The boo

9、k was written in easy English even primary school students could understand it. A.so;that B.such;that C.too;to D.very;that,解析 ：根据题意从A和B中选，因为easy English是表示简单英语，属于名such修饰名词，所以本题选B,4.Zhou libo is shanghais favourite funny man.He is good at making people laugh. His lively shous werehot that tickets sol

10、d out in minnutes. A.very B.too C.such D.so,解析：从题意可知周立波是一个非常热 情的人，句中hot属于形容词所以本题选D.,5.-You study hard you are sure to pass the exam. -Thank you for saying so. A.enough ;to B.as;as C.so;that,解析:根据翻译 你学习这么刻苦肯定通过考试。hard是形容词所以选C,6.This meeting is important that you mustnt miss it. A.Very B.such C.so D.too,解析；翻译是 如此重要，句中important属于形容词所以选C,7.She was angry couldnt say a word . A.so;as B.so;that C.too;to D.very;that,解析:本题翻译是她很生气，都不能怎样怎样。所以根据翻译本题应选B.sothat 中文翻译 如此以至于，所以本题选B,8.- good time we had at the party last night. -Yes.It was exciting party that I would never