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1、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：-Whyarentgoingthere?-BecauseIdontwantto.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，letsgoforawalk.既然雨停了，我们出去散散步吧。,as和since语气较弱，
2、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,hecantgetthereeasily.Sincewehavenomoney,wecantbuyit.(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_therewas somethingwrongwithmybike.2.Hetookoffhiscoat_hefelthot.3._youc
3、antanswerthequestion,Illasksomeoneelse.,because,for,As/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通常由sothat,inorderthat（为了，以便）引导。例:Westartedearlysothatwecouldcatchthefirsttrain.Weusedthecomputerinorderthatwemightsavetime.(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：Hegotupearlysothathecouldgettoschoolonti
4、me.=Hegotupearly（inorder）togettoschoolontime.,二、结果状语从句,(1),结果状语从句由,sothat,suchthat,sothat,引导。,(2)sothat,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：,Hewassogladthathecouldntsayaword.,Motherlivessofarawaythatwehardlyever,（几乎不，从来不）,seeher.,二、结果状语从句,(1),结
5、果状语从句由,sothat,suchthat,sothat,引导。,(2)sothat,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：,Hewassogladthathecouldntsayaword.,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,ma
6、y,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：Ihurried_Iwouldntbelateforclass.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？,so that,so that,so that,soasto(肯定结构)e
7、g.Hegotupearlysoastocatchtheearlytrain.soasnotto(否定结构)eg.Hegotupearlysoasnottomisstheearlytrain.toeg.Hegotupearlytocatchtheearlytrain.inorderthateg.Hegotupearlyinorderthathecouldcatchtheearlytrain.inordertoeg.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sothat,suchthat,soth
8、at引导。(2)sothat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：Hewassogladthathecouldntsayaword.Motherlivessofarawaythatwehardlyever（几乎不，从来不）seeher.,（2）在由suchthat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.Itwassuchahotdaythatnobo
9、dywantedtodoanything.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.Soonthereweresomanydeerthattheyateupallthewil
10、droses.B.Hehassolittletimethathecantgotothecinemawithyou.(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：Hewassoexcitedthathecouldntgotosleepthatnight.=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：他够大了，可以去上学。Heissooldthathecouldgotoschool.=Heisoldenoughtogotoschool.练习：1.Itis_hoti
11、ntheroom_wehavetogooutforawalk.2.Itwas_awonderfulmovie_allofuswantedtoseeitagain.3.Therewas_littlewaterinthebottle _ thebird couldntreachit.,so that,such that,such that,强化练习一、单项选择。1Wellstayathomeifit_tomorrow.ArainBrainsCisrainingDwillrain2Wedidntgohome_wefinishedthework.AsinceBuntilCbecauseDthough3
12、She_whenIwenttoseeher.AisreadingBhavereadCwasreadingDreads4_therainstops,wellsetoffforthestation.ABeforeBUnlessCAssoonasDThough5Shelooksforwardeveryspringto_theflowergarden.AvisitBpayingavisitCwalkinDwalkingin6Mr.Whitehopedhe_Chinathenextyear.AwouldvisitBwillvisitCvisitedDhasvisited7Itoldhimthatthesun_intheeast.ArisesBroseChasrisenDwasrising,
