2023学年完整公开课版八年级下册Module DiscoveryUnit The unknown world

Unit7GrammarAdverbialclausesofreasontelluswhythingshappen.Weusuallyusebecause,asandsincetostartadverbialclausesofreason.AAdverbialclausesofreason原因状语从句Adverbialclauseofreason

Mainclauserefuseadverbial主句拒绝；回绝状语（1）because引导的原因状语从句表示的因果关系语气最

强，常用来回答why提出的问题。如：Ididn’tgobecauseIwasafraid.（2）as引导的原因状语从句时语气最弱，它所表示的原因只是对结果的附加说明，可位于句首或句末。如：IleftamessageasJimwasn’there.

（3）since引导的原因状语从句语气次于because，

常表示稍加分析便能得出来的原因，或人们已知

的事实，意为“既然，鉴于”，常置于句首。如：

Sincetheweatherissobad,wehavetodelayourjourney.

AdverbialclauseofreasonMainclauseBecause

AsSincenoonesawelsethosealiens.Irefusetobelieveyou.Wecanalsoputtheadverbialclauseofreasonofreasonafterthemainclause.AdverbialclauseofreasonMainclausebecauseassincenoonesawelsethosealiens.Irefusetobelieveyou.Thingstoremember

Whenweputtheadverbialclauseofreasonatthebeginningofthesentence,weoftenseparateitfromthemainclausewithacomma(,)ThepoliceofficeraskedTomsomemorequestionsaboutthealiens.Matchthequestionswiththeanswers.Thenusethemtocompletethepoliceoffice’snoteswithas,sinceorbecause.1（because）Tinawassurethatsomethinglandedintheforestnearthehillsbecausesheheardaloudnoiselastnight.（as）3（Because）4（Since）Sincenooneelsesawthesealiens,fatherrefusedtobelievethem.Werunawaybecauseanaliensawusandmadeaterriblenoise.Tinahidbehindsomebushesastheyheardsomevoicesspeakingastrangelanguage.BbecauseofWecanalsousebecauseoftogivereasonthereasonforsomething.Theywenttotheforestbecauseoftheircuriosity.Tinawokeupatmidnightbecauseofaloudnoise.Shedecidedtoexploretheforestbecauseofit.

becauseofcuriositymidnightdecidetoexplore因为；由于好奇心午夜；子夜决定做……探讨WorkouttheruleWecanuseanoun,anounphraseora（subjectpronoun/objectpronoun）afterbecauseof.Writesentencesaboutthestoryonpage99byusingbecauseof.1Tinawassurprised/theyellowlightinthesky2Thealienslandedonthisplanet/anaccident3Thechildrenranawayfromtheforest/thealiens4Theirdadwasnotsureaboutthechildren’sstory/thewritingonthepieceofpaperTinawassurprisedbecauseoftheyellowlightinthesky.

Thealienslandedonthisplanetbecauseofanaccident.Thechildrenranawayfromtheforestbecauseofthealiens.Theirdadwasnotsureaboutthechildren’sstorybecauseofthewritingonthepieceofpaper.because和becauseof的区别because和becauseof都意为“因为”。其用法：because是连词，后面接句子，构成表示原因的状语从句；becauseof是短语介词，后面接名词或动词-ing形式，在句子常用作状语。如：

Ididn’tbuyitbecauseitwastooexpensive.我没有买是因为它太贵了。

Heisherebecauseofyou(that).他为你(那事)而来这里。1.Herealizedshewascrying_____whathehadsaid.

a.becauseb.becauseof2.Ididn’tbuyit______itwastooexpensive.a.becauseb.becauseof3.Helosthisjo