Unit7

Theunknownworld語法原因狀語從句(Adverbialclausesofreason)定義在句中用來說明主句原因的從句叫原因狀語從句。常用引導詞because(因為)，as(由于)，since(既然)，nowthat(既然)時態(tài)原因狀語從句一般都是根據(jù)實際情況選用適當?shù)臅r態(tài)。通常是主過從過，主現(xiàn)從現(xiàn)。原因狀語從句(Adverbialclausesofreason)because，since，as和for的區(qū)別because引導的原因狀語從句一般放于主句的后面，because從句位于句首時與主句要用逗號分開，放在句中時，可不用逗號分開。because表示直接原因，語氣最強，用于回答why引導的疑問句。becauseof也表示原因，但它后面不接從句，可以接名詞、代詞、名詞性短語。注意：because和so不可同時出現(xiàn)在一個句子里。Wewentbybusbecauseitwascheaper.＝Itwascheapersowewentbybus.我們乘公交車去，因為這樣便宜一些。Hecan'tgotoschooltodaybecauseofhisillness.＝Hecan'tgotoschoolbecauseheisilltoday.他今天病了，不能去上學。—Whynotgoouttoplayfootballwithus?為什么不和我們一起去踢足球呢？—Becausemyparentsarenotathome.Ihavetolookaftermyyoungersister.因為我父母不在家，我得照顧我的妹妹。原因狀語從句(Adverbialclausesofreason)because，since，as和for的區(qū)別since引導的原因狀語從句一般放于主句之前表示已知的、顯然的理由(通常被翻譯成

“既然”

＝nowthat)，較為正式，語氣比because弱。另外，because著重強調(diào)原因，since著重強調(diào)結(jié)果。Sinceyouarefreetoday,youhadbetterhelpmewithmymathematics.既然你今天休息，你最好幫我補習數(shù)學。Sinceyoudon'ttrusthim,youshouldnotemployhim.既然你不信任他，你就不該雇用他。Nowthatyouaregrown-up,youshouldnotrelyonyourparents.既然你長大了，就不該依靠你的父母了。原因狀語從句(Adverbialclausesofreason)because，since，as和for的區(qū)別as引導原因狀語從句時表示附帶說明的原因(往往為雙方已知)，語氣比since弱，較為正式，位置較為靈活(常放于主句之前)。另外，與since一樣，as側(cè)重強調(diào)結(jié)果。Asitisraining,you'dbettertakeataxi.由于正在下雨，你最好乘坐出租車。Asyouaretired,youhadbetterhavearest.由于你累了，最好休息一下吧。Iwenttobedearly,asIwasexhausted.我睡得早，因為我筋疲力盡了。原因狀語從句(Adverbialclausesofreason)because，since，as和for的區(qū)別for連接的是并列分句，表示原因，但并不說明直接原因，只提供一些輔助性的補充說明，或?qū)δ撤N情況加以推斷，表示補充說明理由。for連接的并列分句只能放于句子后面。Heseldomgoesoutnow,forheisveryold.他現(xiàn)在難得出門了，因為他年事已高。Hemustbeill,forheisabsenttoday.(mustbe對現(xiàn)在的肯定推測)他一定是生病了，因為他今天沒有來。Hecouldnothaveseenme,forIwasnotthere.(couldn'thavedone對過去的否定推測)他不可能見過我，因為我不在那里。一、單項選擇()1.(2022?武威)Ihaven'tgotanyapplejuice,

I'vegotsomeorangejuice.Wouldyoulikesome?A．butB．a(chǎn)ndC．orD．forA()2.(2022?樂山)Don'tbeafraidtomakemistakes,

you'llneverreallylearnthelanguage.A．a(chǎn)nd B．or C．soB()3.(2022?安徽)Youwon'tfullyexperiencethecultureofaforeigncountry

yougothereinperson.A．because B．unless C．a(chǎn)ssoonas D．a(chǎn)slongas()4.(2022?江西)

manythingschangealot,aloveofsportshasn'tchangedabit.A．If B．Before C．Though D．BecauseBC()5.(2022?云南)Foryoursafety,youmustn'tgetclosetothetrain

itstops.A．while B．when C．since D．untilD()6.—DidyoureturnFred'scall?—Ididn'tneedto

I'llseehimtomorrow.A．though B．unless C．when D．becauseD()7.

youcan'tanswerthequestion,perhapswe'dbetterasksomeoneelse.A．Until B．SinceC．When D．AsB()8.—Didyouhaveasportsmeetingyesterday?—No，wedidn't.Itwasputoff

theheavyrain.A．insteadof B．becauseofC．a(chǎn)sfor D．a(chǎn)sB()9.

hewasveryill,hestillwentonworking.A．Because B．ForC．Though D．/()10.(2022?重慶A卷)—Ilikerain

itmakesmefeelcoolandrelaxed.—SodoI.A．or B．becauseC．but D．howeverCB二、選擇恰當?shù)倪B詞完成句子(because，as，since，for)1．Ididn'tgotoschoolyesterday___________Iwasill.2．_________everybodyishere,let'sbeginourmeeting.3．Hemighthavegonetobed,

_______thelightwentout.4．______Janewastheoldestinthisfamily,shehadtolookaftertheothers.5．Thedaybreaks,

_______thebirdsaresinging.becauseSinceforAsfor三、語法填空(2022?德陽)閱讀下面短文，在空白處填入一個適當?shù)膯卧~或括號內(nèi)單詞的正確形式。WhenIwasachild,Ilovedtovisitmygrandparents'farm.Therewasalwayssomethingnewtodo,1.______(see)andtoenjoy.

toseeOneday,I,togetherwithmybrothersandsisters,wenttomygrandparents'farmtocelebratemybirthday.Wealllikedeatingstrawberriesandwewenttopick2.______(they).Weeachtookabasket.ButIwaslazy.Itookthe3.________(small)basket.Whiletheotherswerepickingstrawberries,Ihadarest.Beforewe4.________(return),IputalotofgrassinmybasketandthenIputafewstrawberriesontop.Thebasketlookedfull.Mygrandfathersaidhewasproud5._____myhardwork.themsmallestreturnedofThenextmorningmygrandmothermademany6.____(pie).Therewasabigpiewhich7._________(make)justforme.Itlookednice!ButwhenIbegantoeatit,Ifoundtherewasnothingbutgrassunderthetopstrawberries!Youcanguess8._____surprisedIwas.Mygrandfatherlookedatme9.______(calm)andsaid,

“Whenyoucheatothers,youcheatyourself.”Hedidn'tneedtosaymorebuttaughtme10.__goodlesson.pieswasmadehowcalmlya課后強化一、根據(jù)句意，從括號內(nèi)選擇適當?shù)脑~語填空1．—Whydoyoulikeyourhistoryteachersomuch?—_________(Because/Since/As)heissuchaninterestingandfriendlyperson.2．_______(Because/Since)everyoneishere,let'sstart.

3．____________(Because/Becauseof)hisbrokenleg,hewasn'tabletoplayinthefootballgamethatday.BecauseSinceBecauseof4．Lindawasangry,

_____(becauseof/for/since)shedidn'tknowwhereherfriendwas.

5．Allofusshouldcaremoreaboutourhealth_________(because/since/for)goodhealthisthefirststeptowardssuccess.

6．_______(For/Since/Becauseof)youhavenotenoughmoney,youcan'tbuythatexpensivecar.

forbecauseSince二、選擇最佳選項()7.Thepolicefoundthathedidn'ttellthetruth.

A.remembered B．discoveredC．produced D．made()8.Iwonderwhenitwillsnow.

A．wanttoknow B．thinkC．speak D．sayBA()9.Icalledyoulastnightbutnobodyanswered.

A．someone B．a(chǎn)nyoneC．noone D．one()10.Tinawantstoplaybaseball,butLilydisagrees．

A．a(chǎn)grees B．doesn'tagreeC．wants D．speaksCB()11.Timwasfrightenedofthesnake.

A．dared B．a(chǎn)fraidC．interested D．like()12.—Ilikeplaying

basketball.Whataboutyou？

—Ilikeplaying

guitar. A.an;an B．a(chǎn)n;the C．/;the D．a(chǎn);/BC()13.—Ihaven't

mypenpal'sletterfortwoweeks.

—Maybeheistoobusyrecently. A．a(chǎn)ccepted B．received C．written D．collected()14.—ThankstoProjectHope,

childrenhavebetterlives.

—That'sgreat. A．thousandsof B．thousands C．thousand D．thousandofBA()15.—Everythingintheroomlookssonice.

—Yes,that'sbecausethemoonlightisshiningin

thewindow.A．over B．a(chǎn)crossC．through D．past()16.—MoYan'sbookshavebeensoldoutinmanybookstores_____

hiswinningoftheNobelLiteraturePrize.—That'strue.A．because B．sinceC．a(chǎn)s D．becauseofCD三、語法填空Metaphor(比喻)isoftenseeninpoetry.Poetsdon't17.______________(direct)talkabouttheirfeelingswhiletheyoftencompareonethingorpersontosomethingelse.directlyThispoemis18.________example.Thehorsegoesthroughthedesert.Itislookingforwardto19._____________(wear)goldengearandrunningfreelyinautumn.LiHe,apoetintheTangDynasty(618-907),usedthehorseasametaphor20.____________(show)hisstrongwishtoputhistalenttogooduseinservinghiscountry.Sadly,itdidn'tcometrue.anwearingtoshowLiw