1/41初二语法（四）状语从句一、定义二、分类及引导词状语从句的分类从句的引导词例句时间状语从句when/while/as,before,after,since,not⋯until,assoonasIwasdoingmyhomeworkwhenmymothercamein.条件状语从句if,aslongas,unless（除非）Unlessweatherstopsme,Igoforawalkeveryday.原因状语从句because,since(既然),as(由于)，for(由于)Sinceeveryoneishere,let’sbeginourmeeting.目的状语从句sothat,inorderthatHegetsupearlyeverymorningsothathecancatchthebus结果状语从句sothat,so⋯that/such⋯thatIt’ssohotthatnobodywantstogoout.让步状语从句though/although/,evenif,whatever,wherever,wheneverWhereveryougo,Iwillgowithyou.比较状语从句than,as⋯as,notas/so⋯asHeisastallasTom.地点状语从句whereSitwhereyoulike.三、具体用法1.时间状语从句(1)主将从现：assoonas,when,until(2)when引导的时间状语从句，主句用过去进行时(3)until/till:①主句的谓语动词是延续性动词,主句用肯定形式:eg.I’llwaitforyoutill/untilyoucometoseeme.②主句的谓语动词是非延续性动词,主句用否定形式(never,nothing):eg.Ididn’tgotobeduntilIfinishedmyhomework.(4)since:since引导的句子用过去时①句式:Itis/hasbeen+时间+since+过去式②现在完成时:2.条件状语从句(1)主将从现:if(2)“祈使句+and/or+引导结果状语从句”(祈使句相当于一个条件状语从句)eg.Useyourhead,andyouwillfindtheway.3.原因状语从句(1)because>since>as,由why提出的问题用because回来.(2)对于人们已经知道的事实,就要用since而不用as或becauseeg.Sincethestarcanshowthedirection,youcanuseithelpyou.4.结果状语从句(1)由so⋯that,such⋯that引导:①so+adj.+that:Sheissolovelythatwealllikeher.②so+adj.+a/an+n.+that:Sheissolovelyagirlthatwealllikeher.=such+a/an+adj.+n.+that:Sheissuchalovelyagirlthatwealllikeher.③such+adj.+n.(不可数名词,复数名词)eg.Theyaresuchbusypeoplethattheydon’thavetimefortheirchildren.ItissuchspicyfoodthatIcan’tbearit.注意:当名词前有many或much形容时,用so而不用such.eg.Wehavesomuchtimethatwecanfinishtheworkverywell.(2)so⋯that=to⋯to『状语从句专项练习』2/42一.用下列方框中的连词填空as⋯as,since,assoonas,so⋯as,before,when,after,because,if,untilBob’sEnglishisverygood,buthisChineseisnot_______good______hisEnglish.Timepassedquicklyandthreeyearswentby_______wefinishedthework.Thewallofourclassroomis_______white______snow.I’llgivethenotetoher_________________shearrives.Shedidn’ttellmeanything_________shecamehere.Tomedidn’tbuytheMP5yesterday________hisauntsaidshewouldbuyoneforhim.I’llgotherebybike__________itdoesn’train.Hedidnotgohome_______hehandedinhishomework.Ihavelearntalot______Icametothisschool._______wesaidgoodbyetoourparents,weleftourhometown.二.单选1.Myunclehastaught_______hewastwentyyearsold.A.sinceB.forC.untilD.after2.Thequestionis_________thatnobodycananswerit.A.veryhardB.toodifficultC.strangeenoughD.sostrange3.Wedon’thavemuchhomeworknowandourschoolbagsare______theyusedtobe.A.asheavyasB.notasheavyasC.asheavilyasD.notasheavilyas4.It’squitecommoninBritaintosay“Thankyou”tothedrivers_____peoplegetoffthebus.A.afterB.sinceC.untilD.when5.______theymaynotsucceed,theywilltrytheirbest.A.ThoughB.WhenC.BecauseD.Unless6.Ifpeople_______cuttingdowntheforest,theywillhavenowhere______.A.keep;toliveinB.willkeep;toliveinC.keep;toliveD.willkeep;tolive7.–Wherewasyourbrotheratthistimelastnight?-Hewaswritingane-mail_______IwaswatchingTVathome.A.assoonasB.afterC.untilD.while8.__________scientistshavedonealotofresearchonA(H1N1)Flu,Therearestillsomecasesforfurtherstudy.A.AsB.OnceC.IfD.Although9.Don’tlaughather.Sheis____...
