as引导定语从句PPT课件

.,1,as引导定语从句,.,2,在限制性定语从句中，如果先行词被thesame,such,as,so等词修饰时，定语从句应由as引导。as作宾语不可省略。1)Heissuchateacheraswerespect.2)Ilikethesamebookasyoudo.Itissobigastoneasnomancanlift.,.,3,在定语从句中，一般的从句关系代词是which、who、whom、that、whose,其代替主句中的人或物，在从句中做主语、宾语或定语。一、as引导限制性定语从句主要结构有：thesameasasassuchassoas,.,4,1.Itsthesamepersonaswewantedtofindyesterday.我们昨天要找的是同一个人。2.SuchgirlsasheknowsaregoodatEnglish.他所认识的女孩都擅长英语。3.Doyouhavesuchbooksaswelike?你有我们喜欢那种书吗？4.Shewillmarryashealthyamanasshecanfind.她将嫁给她能找到的任何一个有钱人。,.,5,5.Thereissowarmahouseaswewanttolivein.这里有如此暖和的房子，我们都想住在里面。6.Hehassodifficultaproblem,asnoneofuscansolve.他有如此难的一个问题，我们没有人能解决。,.,6,二、引导非限制性定语从句as引导非限制性定语从句，指代整个主句内容，从句可置于句首，句中或句尾1Aseveryoneknows,Chinaisabeautifulcountrywithalonghistory.每个人都知道，中国是一个有着悠久历史的美丽国家。2Theearth,asweknow,movesroundthesun.地球，我们都知道，围着太阳转。3Tomworkshardandiswillingtohelpothers,asweallknow.汤母工作努力，并且乐于助人，这一点我们都知道。,.,7,as引导非限制性从句，常意为“正如”。可出现在句首、句中、句末。常见结构有：,asisknowntoall众所周知asisoftenthecaseasmight/couldbeexpectedashasbeensaidbeforeashasbeenmentionedaboveashasbeenpointedoutascanbeimagined正如所设想的那样ascanbeseen(fromthesefigures)asoftenhappens正像经常发生的那样aswillbeshown,这是常有的事,正如人们所预料的,正如上面所提到的,正如前面所说的,正如所指出的,正如所示,.,8,as和which都可以指代主句中的一部分或整个句子的内容，有时可以互换，但as引导的非限制性定语从句位置比较灵活，可以位于主句前面，中间或后面，一般用逗号与主句隔开，而which所引导的非限制性定语从句只能放在主句之后。,As和Which引导的非限制性定语从句的区别,.,9,1.Asyouknow,TaiwanisaninseparatepartofChina.2.Taiwan,asyouknow,isaninseparatepartofChina.3.TaiwanisaninseparatepartofChina,asyouknow.4.TaiwanisaninseparatepartofChina,whichyouknow.,位置不同,As与which的区别,.,10,1.Theyremarried,asweexpected.2.Theyremarried,whichwehadntexpected3.Asoftenhappens,theywonthematchagain.4.Itrainedheavily,whichpreventedusgoingout.,.意义不同（as“正如，就像”表示符合人们的认识和事物的习惯性等意义，即从句与主句语义一致。当从句与主句语义不一致时或从句与主句之间是因果关系时用which）,.,11,asanybodycansee,asweallknow,aswehadexpected,asiswellknown,ashasbeensaidbefore,asoftenhappens,asitis,asisnatural,asisthecase1.Asisknowntoeverybody,themoontravelsroundtheearth.2.Mike，asweexpected,attendedthemeeting.3.Shecameatonce,whichsurprisedmeverymuch.4.Thegirlheardaterriblenoise,whichbroughtherheartintohermouth.,结构不同(as常用于一些固定结构中，类似插入语，而which常用于which+谓语+宾语/宾补结构。,.,12,定语从句易混句型,.,13,1.Istillrememberthedays_Iworkedwiththefarmers.Istillrememberthedays_IspentwiththefarmerswhichB.onwhichC.whenD.what2.Wewereontheway_itbegantorain.Idontliketheway_youspeaktoyourparents.A.whenB.thatC.howD.which,when,which,when,that,.,14,3.Theteacherdidntknowthereason_shewasabsentyesterday.Theteachercouldntacceptthereason_sheexplainedyesterday.A.howB.whyC.thatD.who4.Isthisschool_youevervisited?Isthistheschool_youeverstudied?Isthistheschoolin_youeverstudied?A.whereB.whichC.thatD.theone,why,that,D,A,B,.,15,5.Thisis_hesaidathemeetingyesterday.Thisisall_hesaidatthemeetingyesterday.A.thatB.whichC.whatD.how6._isreportedinthenewspapers,theyhavebeatenalltheotherteams._isreportedinthenewspaperthattheyhavebeatenalltheotherteams._isreportedinthenewspaperisthattheyhavebeatenalltheotherteams.A.ItB.AsC.WhichD.What,C,A,B,A,D,.,16,7.Thatisthehouse,_windowshasntbeencleanedformonths.Thatisthehouse,_thewindowshasntbeencleanedformonths.Thatisthehouse,but_windowshasntbeencleanedformonths.A.itsB.itsC.whoseD.ofwhich,C,D,A,.,17,8.Johnsaidhedbeenworkingintheofficeforhours,_true.Johnsaidhedbeenworkingintheofficeforhours,but_true.hewasB.itwasC.whichwasD.whowas,C,B,.,18,“非限定”使用须知1.从句中所有的关系词都不可省略2.从句通常不能用that引导3.在“非限定”中,指人的关系代词作宾语时,只能用宾格whom,不能用who替换,也不能省略。4.从句不能用why引导,要用forwhich代替why5.从句置于句首时,不能用which引导;而要用关系代词as引导(as可放主句前,也可放主句后),要点归纳,.,19,相同之处：当先行词指整个主句的意思时,这类非限制性_只能由_或_来引导。两者的区别在于：which引导的定语从句只能位于_,而as引导的定语从句可位于_。（位置）2._常译作“这”;而_常译作“正如”,且多与see,expect,imagine,know,hope等动词连用。（含义）3.在定语从句中作主语时,若用_,其谓语部分一般有be;若谓语是不含be的行为动词时,要用_。4._引导的定语从句只表示一个众所周知或意料之中的事,而which不受此限制。5.as常用于固定搭配中:asisoft