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1、请勿用作商业用途！注意资料保密！从句（一）英语中的从句分状语从句（时间、条件、原因、目的、地点、方式、比较、结果、让步从句）、名词性从句（主语从句、宾语从句、表语从句和同位语从句）和定语从句。一、状语从句状语从句和从属连词时间when,whenever,as,while,before,after,till(until),since,eversince,once,assoonas,soonafter,themoment,theminute,eachtime,everytime,bythetime地点where,wherever原因because,as,since,cons
2、ideringthat,nowthat/inthat/notthat…butthat…/目的sothat,inorderthat,forfearthat,incase结果/程度sothat,so+adj/adv+that,withtheresultthat/such+a/an+adj+n+that/条件if,unless,as(so)longas,incase,supposethat,onconditionthat/provided(that)/assuming(that)/once比较as…as,notas(so)…as,more…than让步though,altho
3、ugh,evenif,eventhough,however,whatever,whenever,wherever,whoever,whether…or,nomatterwho/what/which/where/when/whether/how方式as,asif,asthoughNowthattheweatherhasimproved,let’sgooutforapicnic.Theoryisvaluableinthatitcanprovideadirectionforpractice.Seeing(that)herefusedtohelpus,thereisnoreas
4、onwhyweshouldnowhelpthem.●时间、条件、让步、方式等从句可用省略形式转换为简单句。如：As(shewas)achild,shebegantolearnFrench.If(hewas)alive,hemustbeatleastninetyyearsold.Although(hewas)toldtostop,hekeptonworking.Shewon’tcometoyourbirthdaypartyunlessinvited.Theboylookedasif(hewere)afraidofnothing.If(itis)necessary,ring
5、meup.●when,while,aswhen时间状语中的谓语动词可延续，可非延续；while从句谓语动词必延续；as强调主从句两谓语动词是同时发生或存在。____heleftschoolatfourteen,hebegantotrainasanengineer.ASinceBWhenCThenDBut____thedaywenton,theweathergotworse.AWithBSinceCWhileDAsWewereabouttoleavewhenitbegantorain.Wearestudyingwhileheissleeping.Shesangasshew
6、alked.9请勿用作商业用途！注意资料保密！Whiletakingawalkinthestreet,hesawanaccident.●nosooner…than…hardly(barely,scarcely)…when…/assoonas都表示“一……就……”。Hehadnosoonerseenthepolicemanthanheranaway.Nosoonerhadheseenthepolicemanthanheranaway.Shehadhardlysatdownwhenthetelephonerang.Hardlyhadshesatdownwhenthetele
7、phone.●immediately,directly,instantly/eachtime/themoment/thetime/theminute/thesecond/instant都可以直接引导时间状语从句,都表示“一……就……”。IwenttoseehimimmediatelyIheardfromhim.IwenttoseehimassoonasIheardfromhim.Sheletoutacrythemomentshesawthesnake.●not…until…的强调句型ItwasnotuntilhecamebackthatI
