as,since,because,because of的运用与区别

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1、I’msuresomethinglandedintheforestnearthehillsasIheardaloudnoiselastnight.Sincenooneelsesawthesealiens,Irefusetobelieveyou.Readaloud.as,since(既然)可用来引导_______状语从句原因原因状语从句最常用的引导词为________because原因状语从句通常由because,since,as引导。because:表示直接理由，强调别人未知的事实，既可放在主句之前，也可放主句之后。as和since语气较弱，一般用来表示明显的原因

2、。由as和since引导的原因状语从居多放在句首。because，since和as引导原因状语从句时，不能和______连用。soI’msuresomethinglandedintheforestnearthehillsasIheardaloudnoiselastnight.Sincenooneelsesawthesealiens,Irefusetobelieveyou.原因状语从句常放在主句后面,也可放在主句的前面,用逗号隔开。Thespaceshipwasdamaged_____acrash.A.becauseB.asC.sinceD.becauseofbec

3、auseof后面接名词,名词短语,人称代词的宾格;because后接句子.1.Tinawokeupatmidnight_____aloudnoise.A.becauseB.becauseofC.asD.since2.Iwillnottellyoutherules_______Ihavetoldyoubefore.A.becauseB.becauseofC.untilD.while用because或becauseof填空1.Theywenttotheforest___________theircuriosity.2.Tinawokeupatmidnight_____

4、____aloudnoise.3.Timdidn’tgotoschoolyesterday_________hewasill.4.I’munhappy____________yourmarksintheexam.becauseofbecauseofbecausebecauseof根据所给中文补全句子1.LiMingdidn’tgooutforawalkbecauseof_________________.(天下大雨)2.LiMingdidn’tgooutforawalkbecause___________________.(天下大雨)3.LiMingwon’tgo

5、tothemeetingbecause___________________.(他生病了)4.LiMingwon’tgotothemeetingbecauseof__________________.(他生病了)theheavyrainitrainedheavilyheisillhisillnessPractisemore!Writesentencesaboutthestoryonpage99usingbecauseof.Tinawassurprisedbecauseoftheyellowlightinthesky.Thealienslandedonthispla

6、netbecauseofanaccident.Thechildrenranawayfromtheforestbecauseofthealiens.Theirdadwasnotsureaboutthechildren’sstorybecauseofthewritingonthepieceofpaper.Page105《综合练习册》Page113B.2becauseofherillness3becauseoflastnight'sstorm4becauseofacaraccident5becauseofitshighprice6becauseofhisbrokenle

7、gC.1as/since/becausethebatterieswereusedup2becauseofabadcold3becauseofhercarelessness4as/since/becauseshehastotakepianolessons5as/since/becausehehasbeentherebefore6as/since/becauseIknewnoonethere