《英語(yǔ)因果連詞》PPT課件

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1、因果連詞類別1表示原因1.for義為：因?yàn)椋捎凇木壒?；既然；鑒于…You'dbetterputonyoursweater,forit'srathercoldoutside.你最好把毛衣穿上，外邊相當(dāng)冷。Hefeltnofear,forhewasabraveman.他不感到害怕，因?yàn)樗莻€(gè)勇敢的人。Comforthimforheissad.去安慰他，因?yàn)樗鼙瘋?。[比because較為正式，少用于口語(yǔ)中，用于提出證據(jù)或說明前面剛作的陳述]判斷改錯(cuò)：(錯(cuò))Forheisill,heisabsenttoda

2、y.(對(duì))Heisabsenttoday,forheisill.for是并列連詞，不能置于含兩個(gè)并列分句的句子的句首，只能將其放在兩個(gè)分句中間。比較since和forSince用來說明動(dòng)作起始時(shí)間，for用來說明動(dòng)作延續(xù)時(shí)間長(zhǎng)度。Ihavelivedhereformorethantwentyyears.IhavelivedheresinceIwasborn..Myaunthasworkedinaclinicsince1949.Somenewoilfieldshavebeenopenedupsince197

3、6.IhaveknownXiaoLisinceshewasalittlegirl.MybrotherhasbeenintheYouthLeaguefortwoyears.Ihavenotheardfrommyuncleforalongtime.注意：并非有for作為時(shí)間狀語(yǔ)的句子都用現(xiàn)在完成時(shí)。Iworkedhereformorethantwentyyears.(我現(xiàn)在已不在這里工作。)Ihaveworkedhereformanyyears.(現(xiàn)在我仍在這里工作。)小竅門：　當(dāng)現(xiàn)在完成時(shí)+一段時(shí)間，這一結(jié)

4、構(gòu)中，我們用下面的公式轉(zhuǎn)化，很容易就能排除非延續(xù)動(dòng)詞在完成時(shí)中的誤使。1)(對(duì))TomhasstudiedRussianforthreeyears.=TombegantostudyRussianthreeyearsago,andisstillstudyingitnow.2)(錯(cuò))Harryhasgotmarriedforsixyears.=Harrybegantogetmarriedsixyearsago,andisstillgettingmarriednow.顯然，第二句不對(duì)，它應(yīng)改為Harrygotm

5、arriedsixyearsago.或Harryhasbeenmarriedforsixyears.2.because1.因?yàn)?，由于：Theboywasalwayslatebecauseittooksolongtogetdressed.這個(gè)男孩因花太長(zhǎng)時(shí)間穿衣服總是遲到。Ican'tdoitnowbecauseIambusy.因?yàn)槲艺χ?，現(xiàn)在不能做此事。2.[用于引導(dǎo)一個(gè)名詞從句，相當(dāng)于that或thefactthat]…這一事實(shí)，…這一點(diǎn)原因，原因是：ThereasonIamhereisbecause

6、Iwanttoaskforyourhelp.我之所以到這兒來是想尋求你的幫助。3.[用于省略句，表示暫不便說明詳細(xì)理由]：Ithinkitwouldmakeherfeelbetterbecause.我想它會(huì)使她覺得好受些。原因嘛，現(xiàn)在不說。BecauseofButinoverweightoverweightpeople,itcanlookyellowbecauseoffat.但是在超重的人中，因?yàn)橹舅赡芸雌饋硎屈S色的。Becauseofthis,yousometimescanusecontrailst

7、opredicttheweather.因?yàn)樵?，你有時(shí)候可以用這條軌跡來預(yù)測(cè)天氣。Thereissomethingtothis—butnotbecauseofwhatishappeninginAmerica.有一點(diǎn)是值得關(guān)注的，并且這一點(diǎn)與發(fā)生在美國(guó)的事情無關(guān)3since因?yàn)?；既然：Sincethisisso,it'sbettertoacceptit.既來之，則安之。4.duetoThescientistsfoundthathalfofthe421deathswereclearlyduetocarbonm

8、onoxidepoisoning.科學(xué)工作者發(fā)現(xiàn)在421個(gè)死難者中，半數(shù)顯然是由于一氧化碳中毒。5.owingtoOnceoutofreachowingtotheblanketoficethatentombedthem,theseresourceslooktemptinglygrabbableasclimatechangeshrinkstheiceshelf.這些資源曾因?yàn)楦采w它們的冰層而顯然遙不可及，但由于氣候變化令冰架收縮