原因狀語從句99961市公開課一等獎(jiǎng)省名師優(yōu)質(zhì)課賽課一等獎(jiǎng)?wù)n件

原因狀語從句AdverbialClausesofCause一、because,since和as引導(dǎo)原因狀語從句because，since，as這三個(gè)詞都可引導(dǎo)原因狀語從句。Because表示直接原因或理由，著重點(diǎn)在從句，用于回答why，語氣最強(qiáng)，常譯為“因?yàn)椤薄ince普通表示對(duì)方已知、無須加以說明既成事實(shí)理由，全句中心在主句，語氣比because弱，常譯為“既然”。As表示十分顯著原因，普通說明因果關(guān)系，著重點(diǎn)在主句，語氣較弱，常譯為“因?yàn)椤?。Difference

1.Thedoctortoldthepatienttogoonadiet

hewasoverweight.A.ontheconditionofB.becauseC.forD.when2.

theweatherwasfine,Iopenedallthewindows.A.AsB.BecauseofC.ForD.With3.

youareleavingtomorrow,wecaneatdinnertogethertonight.A.ForB.SinceC.BeforeD.WhileABB在強(qiáng)調(diào)句式中，若強(qiáng)調(diào)原因壯語從句，只能用because引導(dǎo)從句。Example:Itwas

becausehewasillthathedidn’tgowithus.正因?yàn)樗×耍艣]和我們一起去。二、for和because，as，since區(qū)分4.Thefuelmusthavebeenfinished,

theenginestopped.A.sinceB.asC.becauseD.forbecause，as，since總是表示因果關(guān)系，而且語氣較強(qiáng)；而for引導(dǎo)是并列分句，它只是對(duì)前面分句加以解釋，說明推斷理由，而且只能后置。Wedidnotgooutbecauseitwasraining.（因?yàn)橄掠?，我們沒有出去。）Itmusthaverainedlastnight,forthegroundiswetthismorning.（昨晚一定下雨了，因?yàn)榻裉煸缟系囟际菨?。）D三、短語連接詞引導(dǎo)原因狀語從句5.

thatmyheadhadcleared,mybrainwasalsobeginningtoworkmuchbetter.A.ForB.NowC.SinceD.Despite

Ihaven’tfinishedwritingthereportyet,I’mlazy,Ihavenotime.我還沒有寫完匯報(bào)，不是因?yàn)槲覒?，而是因?yàn)闆]有時(shí)間。Translateasentence:Bnotthatbutthat四、一些介詞詞組引導(dǎo)原因狀語從句6.Hewasnotseverelypunishedforhiscrime

thathewasyoung.A.onthegroundB.inthecaseofC.inviewofD.onconditionbyreasonforfearforthereasononthegroundA①.

because，since，as這三個(gè)詞都可引導(dǎo)原因狀語從句。其中because語氣較強(qiáng)，主要用以回答由why引出問句，since次之，as最弱。since和as表示原因多是既成事實(shí)。若從句表示原因還不是確定事實(shí)，就不能用since。Summary:②.在原因狀語從句