一、狀語從句的種類狀語從句(向句子的狀語一樣)用來表示時(shí)間、地點(diǎn)、程度、目的、結(jié)果、原因、讓步、方式或條件：二、狀語從句的定義和引導(dǎo)詞1. 時(shí)間狀語從句

時(shí)間狀語從句是表示主句動(dòng)作或行為發(fā)生的時(shí)間。時(shí)間狀語從句的引導(dǎo)詞有when,assoonas,before,after,bythetime,by等。時(shí)間狀語從句可以放在句首也可以位于句尾。2. 地點(diǎn)狀語從句

地點(diǎn)狀語從句是表示主句動(dòng)作或行為發(fā)生的地點(diǎn)。地點(diǎn)狀語從句的引導(dǎo)詞有whereandwherever。3. 程度狀語從句

程度狀語從句是表示主句動(dòng)作或行為的程度。程度狀語從句的引導(dǎo)詞有as…as;so…as;than等。4. 目的狀語從句

目的狀語從句是表示主句動(dòng)作或行為發(fā)生的目的。目的狀語從句的引導(dǎo)詞有that,inorderthat,sothat,incaseandlest。5. 結(jié)果狀語從句

結(jié)果狀語從句是表示主句動(dòng)作或行為發(fā)生后所產(chǎn)生的結(jié)果。結(jié)果狀語從句的引導(dǎo)詞有sothat,so…that,such…that.6. 原因狀語從句:

時(shí)間狀語從句是表示主句動(dòng)作或行為發(fā)生或產(chǎn)生的原因。原因狀語從句的引導(dǎo)詞有because,as,for等。7. 讓步狀語從句:

讓步狀語從句表示對主句的動(dòng)作或者行為退讓一步后會導(dǎo)致或產(chǎn)生的結(jié)果。主從句之間是一種轉(zhuǎn)折或遞進(jìn)的關(guān)系。通常用于對某一觀點(diǎn)的辯論。讓步狀語從句的引導(dǎo)詞是though,although,eventhough,while,whereasorevenif.8. 方式狀語從句：

方式狀語從句是表示主句動(dòng)作或行為發(fā)生的方式。方式狀語從句的引導(dǎo)詞有as,asif,asthough，inthat,thewayandhow.9. 條件狀語從句

條件狀語從句是表示主句動(dòng)作或行為發(fā)生的條件。條件狀語從句的引導(dǎo)詞有if,onconditionthat,unless等。三、例句時(shí)間從句用來表示主句動(dòng)作發(fā)生的時(shí)間:when,assoonas,before,after,bythetime,byWhenaproblemoccurs,wewanttoknowaboutit.Thisprovidescomplexinputanddisplaycapabilitieswhenneeded,onanothercomputer.地點(diǎn)狀語從句表示主句動(dòng)作發(fā)生的地點(diǎn):whereandwherever.IwillneverforgetSeattlewhereIspentsomanywonderfulsummers.程度狀語從句表示主句動(dòng)作與從句動(dòng)作的程度的比較:as…as;so…as;than,etc.Heisnotsointelligentashisbrother.Hiswifeismuchyoungerthanheis.目的狀語從句用來說明主句動(dòng)作的目的:that,inorderthat,

sothat,incaseandlest.Recoveralldatatoapointofknowconsistencyincasethesystemfails.Heworkedovertimeinorderthathecancatchupwithhisworkload.結(jié)果狀語從句用來表達(dá)主句動(dòng)作所帶來的結(jié)果:sothat,so…that,

such…that.Thefaminewassoseriousthatthousandsperished.Shelaughedinsuchastrangevoicethateveryoneturnedtolookather.原因狀語從句用來說明主句動(dòng)作或行為的原因:because,as,dueto；

thatthereasonwhyIamcallingbecauseIhaveaproblemwithmyhomedesktopcomputer.Embeddedsystemsareoftenmass-produced,sothecostsavedmaybemultipliedbymillionsofitems.讓步狀語從句表示條件退讓一步，表示雖然，盡管，即使等概念:though,although,eventhough,while,

whereasorevenif.IamtryingtouseaWirelessLANonmyWindowsXPsystem,butIcan’taccessthenetwork.Sincethesystemisdedicatedtoaspecifictask,designengineerscanoptimizeitandreducethesizeoftheproduct.方式狀語從句表示動(dòng)作的方式:as,asif,asthough，inthat,thewayandhowYoucandoasyoulike.Helooksasifhewerescared.Theoldfarmernodded,asthoughheunderstoodeverything.Jimgaveusapleasantsurpriseinthathestoodfirstinthecompetition.條件狀語從句表示主句動(dòng)作發(fā)生的條件:if,onconditionthat,unlessIf/WhenIamhome,mymothercooksdinner.Shewillfailtheexamunlessshestudieshard.Ifwestudiedharder,wewouldlearnit.Hewouldhavegoneabroadifshehadhadenoughmoney.Adverbialclauseofcondition/Conditionals注意：所有條件從句中如果主句在前從句在后，引導(dǎo)詞前不用逗號。ExerciseFillinthegapswithanappropriateconjunction:1. TheyhavelivedinHarbin__________theymovedherein2000.2. __________heisapupil,heknowsquitealotaboutcomputers.3. __________shegoes,shewillbewarmlywelcomed.4. __________youcrossovertotheothersideofthestreet,youmustbecareful.5. Hermotherlovesme__________Iwereherson.6. Thisnotebookisnotasgood__________thatone.7. Hereismymobilenumber__________youcanphonemewhenyoucomeherenexttime.8. Mybosswasangry__________wewer