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1、初中状语从句全面讲解练习题及答案=Ifyoudon’thurryup,you’llbelate.1、基本含义Studyhardandyouwillpasstheexam.用来修饰主句中的动词,副词和形容词的从句叫状语从句。例句:=Ifyoustudyhard,youwillpasstheexam.IwillcallyouassoonasIarriveinBeijing.3.原因状语从句Ifhecomesback,pleaseletmeknow.(1)原因状语从句通常由because,since,as引导。例如:IknowhowtolightacampfirebecauseIhaddon
2、eitbefore.Hedidn’tcometoschoolbecausehewasill.2、用法归纳Asitisraining,weshallnotgothezoo.1.时间状语从句Sinceyoucan’tanswerthequestion,I’llasksomeoneelse.(1)时间状语从句常用when,as,while,before,after,since,till,until,assoonas等引导。(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。Itwasraininghardwhenwegottoschoolyesterd
3、ay.回答由why提出的问题,只能用because。As和since语气较弱,一般用来表示明显Whilehewasdoinghishomework,thetelephonerang.的原因。由as和since引导的原因状语从居多放在句首。例如:Ashewalkedalongthelake,hesanghappily.------Whyaren’tgoingthere?HehadlearnedalittleChinesebeforehecametoChina.------BecauseIdon’twantto.Afterhefinishedmiddleschool,hewenttowor
4、kinafactory.Ashehasnocar,hecan’tgetthereeasily.(2)在时间状语从句里,通常不用将来时态,用现在时态表示将来的动作或状态。如:Sincewehavenomoney,wecan’tbuyit.I’llringyouupassoonasIgettoNewYork.(3)because和so不能同用在一个句子里。Iwilltellhimeverythingwhenhecomesback.4.结果状语从句Hewon’tbelieveituntilheseesitwithhisowneyes.(1)结果状语从句由so…that,such…that,s
5、othat引导。例如:(3)在带有till或until引导的时间状语从句的主从复合句里,如果主句用肯定式,其Heissopoorthathecan’tbuyabikeforhisson.含义是“一直到……时”,谓语动词只能用延续性动词。如果主句用否定式,其含义Sheissuchagoodteacherthateverybodylikesher.是“直到……才……”,“在……以前不……”,谓语动词可用瞬间动词。Mypencilfellunderthedesk,sothatIcouldn’tseeit.Theyoungmanreadtillthelightwentout.(2)so…tha
6、t语such...that可以互换。例如:Let’swaituntiltherainstops.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Wewon’tstartuntilBobcomes.容词(副词)+that+从句”。Hewassogladthathecouldn’tsayaword.Don’tgetoffuntilthebusstops.Thehallissobigthatitcanhold2,000people.2.条件状语从句Motherlivessofarawaythatwehardlyeverseeher.(1)条件状
7、语从句通常由if,unless引导。例如: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Whatshallwedoifitsnowstomorrow?数可数名词,也可以是不可数名词;名词前面可以带形容词,也可不带。如果是单Don’tleavethebuildingunlessItellyouto.数可数名词,前面需加不定冠词a或an。例如:(2)在条件状语从句里,谓语动词通常用现在时态表示将来的动作或状态。