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原因状语从句(1)原因状语从句：从句表示的是主句行为的原因。通常由because,since,as,for引导。(2)because表示直接原因（听话人所不知的），语气最强。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相当于nowthat，“因为…，既然…，鉴于…”表示显然的或已为人知的理由，语气较because弱例如：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引导的原因状语从句多放在句首。例如：Ashehasnocar,hecan’tgetthereeasily.Sincewehavenomoney,wecan’tbuyit.(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:Idecidedtostopandhavelunch,forIwasfeelingquitehungry.Eg:1.Iwaslateforclassyesterday_______therewassomethingwrongwithmybike.2.Hetookoffhiscoat_______hefelthot.3.________youcan’tanswerthequestion,I’llasksomeoneelse.becauseforAs/since目的状语从句目的状语从句:从句表示的是主句行为的目的(1)通常由sothat,inorderthat（为了，以便）引导。(2)例:(3)Westartedearlysothatwecouldcatchthefirsttrain.(4)Weusedthecomputerinorderthatwemightsavetime.(5)(2)sothat可引导目的状语从句，此时可用to或inorderto替换,将其改为简单句。例如：(6)Hegotupearlysothathecouldgettoschoolontime.=Hegotupearly（inorder）togettoschoolontime.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.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.（3）sothat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：A)目的状语从句里往往带有情态动词can,could,may,might等。B)从意思上看，目的状语从句往往表示的目的很明确，不放在句首。例如：Speakclearlysothattheymayunderstandyou.(目的状语句)Jackisbadlyillsothathehastorest.(结果状语从句)练习：1.Ihurried________Iwouldn'tbelateforclass.2.2.Weshouldgobybus_______wecangetthereearlier.3.MayIsitnearer________Icanseemoreclearly?判断以下句子是目的状语从句还是条件状语从句？sothatsothatsothatsoasto…(肯定结构)eg.Hegotupearlysoastocatchtheearlytrain.soasnotto…(否定结构)eg.Hegotupearlysoasnottomisstheearlytrain.to…eg.Hegotupearlytocatchtheearlytrain.inorderthat…eg.Hegotupearlyinorderthathecouldcatchtheearlytrain.inorderto…eg.Hegotupearlyinordertocatchtheearlytrain.用于目的状语从句，还有：结果状语从句(1)结果状语从句由so…that,such…that,sothat引导。(2)so…that与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：Hewassogladthathecouldn’tsayaword.Motherlivessofarawaythatwehardlyever（几乎不，从来不）seeher.（2）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：1.Itwassuchahotdaythatnobodywantedtodoanything.2.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：A.Soonthereweresomanydeerthattheyateupallthewildroses.B.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.=Hewastooexcitedtogotosleep5)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：他够大了，可以去上学。Heissooldthathecouldgotoschool.=Heisoldenoughtogotoschool.练习：1.Itis___hotintheroom___wehavetogooutforawalk.2.Itwas______awonderfulmovie______allofuswantedtoseeitagain.3.Therewas_______littlewaterinthebottle______thebirdcouldn’treachit.sothatsuchthatsuchthat强化练习一、单项选择。1．We’llstayathomeifit______tomorrow.A．rainB．rainsC．israiningD．willrain2．Wedidn’tgohome_____wefinishedthework.A．sinceB．untilC．becauseD．though3．She______whenIwenttoseeher.A．isreadingB．havereadC．wasreadingD．reads4．_____therainstops,we’llsetoffforthestation.A．BeforeB．UnlessC．AssoonasD．Though5．Shelooksforwardeveryspringto____theflowergarden.A．visitB．payingavisitC．walkinD．walkingin6．Mr.Whitehopedhe______Chinathenextyear.A．wouldvisitB．willvisitC．visitedD．hasvisited7．Itoldhimthatthesun______intheeast.A．risesB．roseC．hasrisenD．wasrising