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because。此外，because和so不能同用在一个句子里。例如：------Whyaren'tgoingthere?------BecauseIdon'twantto.→since引导原因状语从句，相当于nowthat，意思是“因为……，既然……，鉴于……”。例如：Sincetherainhasstopped，let'sgoforawalk.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：Ashehasnocar,hecan'tgetthereeasily.Sincewehavenomoney,wecan'tbuyit.(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:Idecidedtostopandhavelunch,forIwasfeelingquitehungry.练习：Iwaslateforclassyesterdaytherewassomethingwrongwithmybike.Hetookoffhiscoathefelthot.youcan'tanswerthequestion,I'llasksomeoneelse.二、结果状语从句(1)结果状语从句由so…that,such…that,sothat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：Hewassogladthathecouldn'tsayaword.Motherlivessofarawaythatwehardlyever（几乎不，从来不）seeher.→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：Itwassuchahotdaythatnobodywantedtodoanything.Hehadsuchlongarmsthathecouldalmosttouchtheceiling.（天花板）→有时上述两种结构是可以互换的。例如：Itwassuchawonderfulfilmthatallofuswantedtoseeitagain.=Thefilmwassowonderfulthatallofuswantedtoseeitagain.(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：Soonthereweresomanydeerthattheyateupallthewildroses.Hehassolittletimethathecan'tgotothecinemawithyou.(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：Hewassoexcitedthathecouldn'tgotosleepthatnight.=Hewastooexcitedtogotosleep.(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：Heissooldthathecouldgotoschool.=Heisoldenoughtogotoschool.他够大了，可以去上学。练习：Itishotintheroomwehavetogooutforawalk.Itwasawonderfulmovieallofuswantedtoseeitagain.Therewerelittlewaterinthebottlethebirdcouldn'treachit.【练习】用so…that…或者such…that…填空：1.ItwashotinthecinemaIfeltveryuncomfortable.2.ItwasafunnyfilmIlaugheduntilIcried!3.fewpeoplecametoseethefilmthemanagerputonanotherfilminstead.4.