中考状语从句之原因、结果、目的状语从句：知识点+习题 ( 无答案）原因、结果、目的状语从句一、原因状语从句(1)原因状语从句通常由because, since, 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b eca us e。
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 引导原因状语从句，相当于now t h at，意思是“因为……，既然……，鉴于……”。
例如：Since 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。
例如：As he has no car, he can't get there easily. Since wehave no money, we can't buy it.(3)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 lunch, for I was feeling quite hungry.练习：I was late for class yesterday there was something wrong with my bike. He tookoff his coat he felt hot.you can't answer the question, I'll ask someone else.二、结果状语从句(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: “...so + 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 nobody wanted to do anything.He had such long arms that he could almost touch the ceiling.（天花板）→ 有时上述两种结构是可以互换的。
例如：It was such a wonderful film that all of us wanted to see it again.=The film was so wonderful that all of us wanted to see it again.(3)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 couldn't go to sleep that night. = 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.+ enough 替换。
例如：He is so old that he could go to school. = He is old enough to go to school. 他够大了，可以去上学。
练习：It is hot in the room we have to go out for a walk. It was awonderful movie all of us wanted to see it again.There were little water in the bottle the bird couldn't reach it.【练习】用so…that…或者such…that…填空：1. It was hot in the cinema I felt very uncomfortable.2. It was a funny film I laughed until I cried!3. few people came to see the film the manager put on another film instead.4.Tom hurt his legs badly he was not able to walk for six months.5.There were many people at the party our house got too crowded.6.Joy has a strong love of films she goes to the cinema every week.三、目的状语从句(1)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.(2)so 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 isbadly ill so that he has to rest. (结果状语从句)练习：I hurried I wouldn't be late for class.We should go by bus we can get there earlier. May I sitnearer I can see more clearly?(4) 补充：so as to…(肯定结构) eg. He got up early so as to catch the early train.so as not to…(否定结构) eg. He got up early so as not to miss the early train. to…eg.He got up early to catch the early train.in order that … eg. He got up early in order that he could catch the early train. in order to…eg. He got up early in order to catch the early train.【练习】一、单项选择。
1．We'll stay at home if it tomorrow. A．rainB．rainsC．is rainingD．will rain2．We didn't go home we finished the work. A．since B．untilC．becauseD．though3．She when I went to see her. A．isreadingB．have readC．was readingD．reads4．the rain stops, we'll set off for the station.A．BeforeB．UnlessC．As soon asD．Though5．She looks forward every spring to the flower-lined garden. A．visit B．paying a visit C．walk inD．walking in6．Mr. White hoped he China the next year.A．would visitB．will visitC．visitedD．has visited7．I told him that the sun in the east. A．risesB．roseC．has risenD．was rising8．She was tired she could not move an inch. A．so,thatB．such, that C．very, thatD．so, as9．He was sentenced to death what he had stolen from the bank. A．that B．since C．becauseD．because of10．I didn't know what . A．wasthe matterB．is the matter C．the matter wasD．the matter is11．I couldn't agree with at the meeting. A．that you saidB．which you said C．what did you sayD．what you said12．The bad man ran away to avoid and was finally put into prison.A．seeingB．to be seen C．being seenD．to be caught13．Everyone except Jim and Jack . A．knowwho is heB．know who he is C．knows who is he D．knows who he is15．It is ten years I left my hometown. A．sinceB．IfC．whetherD．until16．Could you tell us Mr. Brown lives in Room 202？A．that B．whereC．until D．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．When C．ifD．whether19．—Why is their classroom so clean and tidy？—it is cleaned every day. A．Since B．AsC．BecauseD．For20．Can you tell me is going to give us a talk next Monday？A．whoB．whom C．whoseD．what21. Please answer the question in a loud enough 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. than。