状语从句课件 (29)

Adverbialclause状语从句•状语从句的分类•when,while和as的区别•because,as,since和for的区别•themoment引起的状语从句•nosooner…than和hardly/scarcely...when•as引导让步状语从句•though和althoughWhileJohnshoppedforhotdogs,hiswifeshoppedfortomatoes.时间状语从句Wherethereislife,thereishope.地点状语从句Supposewecan’tgetthenecessaryequipment,whatshouldwedo?条件状语从句Heisthreeyearsolderthanhisbrother.比较状语从句Hewalkedintotherestaurantasifitbelongedtohim.方式状语从句I’llleavehimanotesothathe’llknowwhereweare.目的状语从句Becauseyouobject,I’llchangetheplan.原因状语从句Smithhadsuchafiercedogthatnoonedaretogonearhishouse.结果状语从句Youngasheis,heknowsalotofthings.让步状语从句主句的谓语是瞬间动词，从句用延续动词的时候，这三个词没有区别。As/when/whileIwaswalkingdownthestreet,Inoticedapolicecarinfrontoftherestaurant.when引导的从句中的谓语动词可以是瞬间动词（1）或发生在主句句之前（2）（1）WhenJohnarrivedIwascookinglunch.（2）I’llletyouknowwhenitisarranged.while强调两个动作在某一时间内同时发生。从句不能表示一点时间，要表示一段时间，用延续性动词。While也可以表示“而”。Whileshewashavingsupper,sheheardthebellring.______(when/while)hegotthegoodnews,helaughed.got是瞬间性动词WhenShelikesmusic,whileIprefersports当表示主句和从句的两个动作同时发展变化的情况时，用as,意为“随着”。Asmoreandmorevisitorscomehere,theforestbecomesdirtieranddirtier.because语气最强，表示直接原因，一般放在句末。as和since引导是众所周知的原因，常放在主句前，翻译为“既然”。for引导的是并列句，对前面的句子进一步补充和说明。两个句子之间一般用逗号分开。IamleavingbecauseI’mfedup.Sinceeverybodyishere,let’sbeginourdiscussion.Idecidedtostopandhavelunch,forIwasfeelingquitehungry.Themoment,theminute,theinstant这三个词都可以做连词，相当于“assoonas”Youseethelighteningthemomentithappens,butyouhearthethunderlater.nosooner…than和hardly/scarcely...when主句从过去完成时，从句用一般过去时Hardlyhadhebeguntospeakwhentheaudienceinterruptedhim.as引导让步状语从句，意为“虽然，尽管”，相当于though。从句一般采用倒装结构：分词/副词/形容词/名词+as+主语+动词。名词位于句首时，冠词省略。Childasheis,hecantellblackfromwhite.(thoughheisachild)Tryasyouwill,youcannotpersuadehim.(thoughyouwilltry)though可以在句首，也可以在句末，although一般在句首______everybodyishere,nooneknowstheanswer.Wewentthere______wewerebusy.AlthoughthoughHeisveryyoung,_______heisveryclever.thoughThough相当于“可是”，前面有逗号