高考英语同位语从句高三英语课件

同位语从句同位语从句同位语从句在句中作某些名词的同位语，这些名词常见的有，fact,news,hope,truth,idea,suggestion,thought,question,order,problem,belief,doubt,fear等。引导同位语从句的连词通常有that和whether,what,why,how…等。(1)TheyexpressedthehopethattheywouldcomeovertovisitChinaagain.(2)Weallknowthetruththattheearthgoesroundthesun.(3)Theyaskedmethequestionwhethertheworkwasworthdoing.(4)Theyproblemwhetheritisrightorwronghasnotyetbeendecided.(5)Ihavenoideawherehelives.试比较：Heputforwardthesuggestionthatthesecondquestionshouldbediscussedfirst.（同位语从句）Thesuggestionthathehadputforwardwasturndown.（定语从句）注意：同位语从句和定语从句的区别是：前者说明名词的内容，后者说明名词的性质特征；前者所用连词that在从句中不做成分，后者所用关系代词that在从句中做成分。Tellthedifference1.Thenewsthattheplanewouldtakeoffontimemadeeverybodyhappy.2.Thenewsthatisspreadingaroundtheairportisthataheavystormiscoming.3.Thesuggestionthatstudentsshouldlearnsomethingpracticalisworthconsidering.4.Thesuggestionthattheyareconsideringisthatstudentsshouldlearnsomethingpractical.名词性从句名词性从句包括主语从句、表语从句、宾语从句和同位语从句。它的功能相当于名词，引导名词性从句的引导词归纳起来可分为以下三类。连接词that:不做成分,无意思,不可省(宾语从句除外)Whether:不做成分,具备意思,不可省What/how等特殊疑问词:做成分,具备意思,不可省that1.Thathewillcomeiscertain.2.ThetruthisthatIhaveneverbeenthere3.Theypretended(that)theywerereadingintheroom.4.Thefactthatshehadnotsaidanythingsurprisedallofus.Histeachersaid(that)thebookwasveryinterestingandthatitwasworthreading.Whether1.Whethersheiscomingornotdoesn’tmattertoomuch.2.Ourfirstquestioniswhetheryoulikemusic.3.Iwonderwhetheritistrueornot.4.Theproblemwhetheritisrightorwronghasnotyetbeendecided.Whether/ifwhether和if引导的宾语从句：whether和if引导宾语从句时可以互换使用，但下列情况只用whether不用if:（1）在whetherornot结构中Idon’tknowwhetherornothe’llcome.Iwonderwhetheritistrueornot.（2）介词+宾语从句”Everythingdependsonwhetherthesituationwillimprove.(3)whether+todoPleasetellmewhethertogoornot.（4）引导主语从句,表语从句及同位语从句Whetherwe’llgodependsontheweather.Thequestioniswhetheritisworthdoing.What/how等特殊疑问词引导的名词性从句1.Whereshehasgoneisnotknownyet.2.Thatiswhyshewasabsentyesterday.3.Ididn’tknowwhattheyweretalkingabout.4.Ihavenoideawhenhewillbeback.补充:一.几种常见的含主语从句句型1.以it作形式主语，把主语从句后置的常用句型有：1.It+be+形容词+that从句Itis/wascertainthat–clauseclearimportantnecessaryprobablepossible（1）Itiscertainthatshewilldowellinherexam.（2）Itisprobablethathetoldmeeverything.2、It+be+名词词组+that从句Itis/wasapitythat–clauseshameduty(1)Itisapitythatwecan’tgo.(2)Itisnosurprisethatourteamshouldhavewonthegame.3、It+be+过去分词+that从句Itissaidthat–clausereportedthoughthopedbelievedknown(1)Itissaidthatheisthebeststudentintheclass.(2)ItisthoughtthatJoedrivesbadly.4、It+seem,happen,appear等不及物动词+that从句。(1)ItseemsthatAliceisnotcomingtothepartyatall.(2)IthappenedthatIwasoutthatday.二.表语从句还可用asif/though,because引导比较下列两句话：.It/Thisisbecauseweareclosertothesuninsummerthanweareinwinter..Thereasonwhyhedidn’tcomewasthathewasill.Itlooksasifitisgoingtorain.