原因状语从句(1) 原因状语从句通常由because, si nee, as,for 引导。

(2) because表示直接原因，语气最强。

because引导的原因状语从句多放在主句之后。

回答由why提出的问题，只能用because。

此外，because和so不能同用在一个句子里。

例如：--- Why aren' t going there? ------- Because I don ' t want to.since弓I导原因状语从句，相当于now that，意思是因为....... ，既然.... ,鉴于...... ”。

例如：Si nee the rain has stopped , let ' s go for a walk.既然雨停了，我们出去散散步吧。

as和since语气较弱，一般用来表示明显的原因。

由as和since引导的原因状语从居多放在句首。

例女口 : As he has no car, he can ' t get there easily.Since we have no money, we can ' t buy it.(4)for表示所说的理由是一种补充说明，for引导的从句一般不放在句子的开头。

如：I decided to stop and have lun ch, for I was feeli ng quite hun gry.小试牛刀：I was late for class yesterday there was someth ing wrong with mybike.He took off his coat he felt hot.(1) 结果状语从句由so…that, such …that, so that引导。

(2) so…that语such...that可以互换。

在由so...that引导的结果状语从句中，so是副词，与形容词连用。

其结构是：…'“ +形容词(副词)+ that + 从句”。

例如：He was so glad that he couldn ' t say a word.Mother lives so far away that we hardly ever (几乎不，从来不) see her.在由such…that引导的结果状语从句中，such是形容词，它修饰的可以是单数或复数可数名词，也可以是不可数名词；其结构是：...'such +a / an + 形容词+名词+ that + 从句”。

例如：It was such a hot day that n obody wan ted to do anything.He had such long arms that he could almost touch the ceili ng. (天花板)有时上述两种结构是可以互换的。

例如：It was such a won derful film that all of us wan ted to see it aga in.=The film was so won derful that all of us wan ted to see it aga in.⑶如果名词前由many, much, little, few 等词修饰时，只能用so,不用such。

例如：Soon there were so many deer that they ate up all the wild roses.He has so little time that he can ' t go to the cinema with you.(4)如果主从句的主语相同，并且从句是否定的形式，可以用too...to...句型转化。

例如：He was so excited that he could n't go to sleep that ni ght. = He was too excited to go to sleep.(5)如果主从句的主语相同，但从句是肯定的形式，可以用adj.+ en ough替换。

例如：He is so old that he could go to school. = He is old en ough to go to school. 他够大了，可以去上学。

hot in the room w e have to go out for a walk.It was ______ a won derful movie _______ all of us wan ted to see it aga in. There were _________ little water in the bottle ___________ the bird couldn ' t reach it.He is so young that he could n'tgo to school.= __________________________________________ .The classroom is so big that it can hold 100 person. = ___________________________________目的状语从句 ⑴目的状语从句通常由so that, in order that （为了，以便）引导。

例如： We started early so that we could catch the first train.We used the computer in order that we might save time.⑵so that 可引导目的状语从句，此时可用to 或in order to 替换,将其改为简单句。

例如： He got up early so that he could get to school on time.=He got up early （ in order ） to get to school on time.（3）so that 既可引导目的状语从句，又可引导结果状语从句。

区别这两种从句的办法有两个：1）目的状语从句里往往带有情态动词 can, could, may, might 等。

2）从意思上看，目的状语从句往往表示的目的很明确。

例如：Speak clearly so that they may understand you.（ 目的状语从句）Jack is badly ill so that he has to rest.（结果状语从句）I would n't be late for class.We should go by bus __________ we can get there earlier.May I sit nearer _____________ I can see more clearly?一、单项选择。

1. we ll stay at home if it ______ tomorrow.A . rainB . rainsC . is rainingD . will rain 2. _______________________ We didn ' t go home we finished the work. A . sinceB . untilC . becauseD . though3 . She ____ whe n I went to see her.A . is readi ngB . have readC . was readi ngD . reads 4 . ____ t he rain stops, we ' ll set off for the station.A . BeforeB . Un lessC . As soon asD . Though5 . She looks forward every spri ng to ___ t he flower-li ned garde n.A . visitB . pay ing a visitC . walk inD . walki ng in 6 . Mr. White hoped he _____ Chi na the n ext year. A . would visit B . will visitC . visitedD . has visited7 . I told him that the sun ____ in the east.A . risesB . roseC . has rise nD . was rising8 . She was _____ t ired ____ she could not move an in ch.A . so, thatB . such, thatC . very, thatD . so, as 9 . He was sentenced to death ___ what he had stole n from the bank.A . thatB . sinceC . becauseD . because of小试牛刀：It is小试牛刀：I hurried10 . I didn ' t know what _______ .A . was the matterB . is the matterC . the matter wasD . the matter is11. I couldn ' t agree with _______ at the meeting.A . that you said B. which you said C. what did you say D. what you said12 . The bad man ran away to avoid ______ and was fin ally put into pris on.A . seeingB . to be seenC . being seenD . to be caught13 . Everyone except Jim and Jack _____ .A . know who is heB . know who he isC . knows who is heD . knows who he is15 . It is ten years ____ I left my hometow n.A . si neeB . IfC . whetherD . until16 . Could you tell us _____ Mr. Brow n lives in Room 202 ?A . thatB . whereC . untilD . if17 . I learned a little Russian _____ I was at middle school.A . thoughB . althoughC . as ifD . when18 . I don ' t know ______ or not it will rain tomorrow.A . thatB . WhenC . ifD . whether19 . —Why is their classroom so clea n and tidy ? —_____ it is clea ned every day.A . Si neeB . AsC . BecauseD . For20 . Can you tell me _____ is going to give us a talk n ext Mon day ?A . whoB . whomC . whoseD . what21. Please an swer the questi on in a loud eno ugh voice all the class may hear.A. so, thatB. orC. in order thatD. and22. Lift it up __ I may see it.A. thoughB. so thatC. asD. than23. I hurried _ I would n't be late for class.A. soB. so thatC. ifD. unl ess24. We should go by bus __ we can get there earlier.A. as soon asB. whereC. in order thatD. as25. The dict ionary is so expe nsive _ I can't buy it.A. becauseB. whe nC. thatD. if26. I got there __ l ate __ I did n't see him.A. too; toB. such; thatC. so; thatD. so; as27. It is __ hot in the room ___ we have to go out for a walk.A. such; thatB. so; thatC. as; asD. such; as28. He has __ a n interesting book that we want to read it.A. soB. suchC. the sameD. as29. Betty did n't go to see the film yesterday she was ill.A. becauseB. butC. untilD. if30. He took off his coat ______ he felt hot.A. becauseB. asC. ifD. since31. The lady was __________ fat that she was not fit for this skirt.A. tooB. asC. suchD. so32. Our PE teacher walks ______________ we can 'catch up with him.A. so quick thatB. too quickly thatC. so quickly thatD. too quickly that33. Mrs. Gree n is _____________ that she ofte n gives can dies to the childre n.A. so a nice ladyB. such a nice ladyC. a so nice ladyD. too nice a lady答案：1-5 BBCCD 6-10 AAADA 11-15 DCDBA 16-20 DDDCA 21-25 C B B C C 25-30 C B B A A 31- D C B。