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1、Unit 7 The unknown worldGrammar,The police officer asked Tom some more questions about the aliens.Match the questions with the answers.Then use them to complete the police officers notes with as,since or because.,b,a,d,c,Adverbial clauses of reason(原因状语从句)tell us why things happen.We usually use bec
2、ause,as and since to start adverbial clauses of reason.,从句在句首时，中间用逗号与主句隔开,语法解析：,because,as,since 连词，构成原因状语从句，不能与so 连用。语气:because since as 区别：because(1)因为，用why问，用because答。(2)because+句子 because of+n./代词2.since(1)因为，既然 Since everyone is here,lets start.(2)自以来。时间状语从句 Weve known each other since we were
3、children.,3.as(1)由于，因为 We all like her as she is kind.(2)=when,当的时候。时间状语从句 He dropped the glass as he stood up.,1.他因为一场事故失去了双亲。He lost his parents _ _ an accident.2.既然你已经在这儿了，何不多待两天？_ you are here,why not stay for two more days?3.你生病了，最好去看医生。_ you are ill,youd better go to see a doctor.4.我没去那里，因为我不想
4、见到他。I didnt go there _ I didnt want to see him.5.由于要赶去火车站，他们很早就起床了。_ they needed to go to the train station,they got up early.,because ofSince As/Since becauseAs,()1.He didnt pass the exam _ he didnt studyhard.A.for B.because C.since D.so()2.What shall we have for lunch _ we dontgo shopping now?A.wh
5、en B.before C.unless D.if()3.The policeman praised(表扬)me,_ helpingthe blind man cross the street.A.because B.for C.with D.as()4._ there are too many people here,we have to find another house.A.Because B.Though C.Since D.If()5.Ill give her the massage _ she comes back.A.till B.before C.since D.as soo
6、n as,BDBCD,()6._ he is very young,he knows several language.A.Though B.Because C.As D.Since()7.They didnt start the work _ their teachercame back.A.until B.while C.as soon as D.if()8.He lost the game _ his carelessness.A.in order to B.because of C.according to D.full of()9.Ann is not active and she
7、wont join us _ she is asked to.A.when B.because C.unless D.if()10._ its getting dark,lets go home now.A.Because B.When C.If D.As,AABCD,()1.-Why didnt you go to the party?-_ I wasnt invited.A.As B.Since C.Because D.So()2.The baby is sleeping,_ youd better keepquiet.A.but B.or C.because D.so()3._ it was raining,_ they stayed at home.A.Because;so B.Because;/C.Since;so D.As;so,BDB,Homework,见双语报,
