Grammar名词性从句1.为什么叫名词性从句？_______________________整个从句相当于一个名词比较:Themanlookedaround.Thattheboyfailedagainintheexamdisappointedhismother.同样作主语，从句可以表示较复杂的含义Iknowhim.Iknowthatheiswritinghiscompositioninhisroom2.为什么要有名词性从句？那人看了看四周.(名词作主语)那孩子考试又不及格令他母亲很失望.(从句作主语)我知道他在房间里写作文.从句的特征:是一个句子,有一个引导词,引导词做从句的一个成分(that除外)名词能做的成分,名词性从句都能做从句表达的意思比名词复杂得多名词性从句主语从句宾语从句表语从句同位语从句主语从句在句中做------宾语从句在句中做------表语从句在句中做------同位语从句在句中-----主语宾语表语同位语1.Thathewillcomeiscertain.2.Iknowthathewillcome.3.ThetruthisthatIhavebeenthere.4.Thefactthatshewaslatesurprisedus.主语从句宾语从句表语从句同位语从句名词性从句是由if,whether,that和各种疑问句词where,when等充当连接词所引导的从句,其功能==名词。宾语从句就是在句中作宾语的名词性从句(1)由that引导的宾语从句(that通常可以省略),例如：(2)由what,whether(if)引导的宾语从句,例如：①Shedidnotknowwhathadhappened.②Iwonderwhetheryoucanchangethisnoteforme.Iheardthathejoinedthearmy.表语从句是在复合句中作表语的名词性从句,放在系动词之后,一般结构是“主语+系动词+表语从句”。可以接表语从句的系动词有be,look,remain,seem等。2).Thisiswhywecan’tgetthesupportofthepeople.1).Thequestioniswhetherwecanfinishitinsuchashorttime.4).Thereasonwhyheislateforschoolisthathemissedthebus.3).Butthefactremainsthatwearebehindtheothers.主语从句定义：作主语的从句叫主语从句，它是名词性从句之一。用法：1)由what等代词引起的主语从句：Whattheteachersaidtodaywasquiteright.老师今天说的话是十分正确的。Thattheyarebadlyinneedofhelpisquiteclear.他们急需帮助，这是十分明显的。2)由连词that引起的主语从句：但是这类句子在大多数情况下会放到整个句子的后部去，而用代词it作形式主语。3)whatever,whoever也可引导主语从句。Whateverwassaidheremustbekeptsecret.这里说的话都应当保密。Whoevermakesmistakesmustcorrectthem.凡犯了错误的人都必须改正。4)由连接代词或连接副词以及whether引起的主语从句。Whethertheywillsellthehouseisnotyetdecided.他们是否卖掉这所房子还没有决定。注意:上述例句中的主语从句都是放在句首,但有时为了使句子结构平衡,避免“头重脚轻”,常用it作形式主语,而把从句放在后面。例如:Itisapitythatshehasmadesuchamistake.她犯了这样一个错误,真是遗憾。这样就构成了下面一些常用句型:1)Itis+adj./n.+从句2)It+不及物动词+从句Itisapity/shamethat...遗憾的是……Itispossiblethat...很可能……Itisunlikelythat...不可能……Itseems/appearsthat...似乎……Ithappenedthat...碰巧……3)It+be+过去分词+从句Itissaidthat...据说……Itisknowntoallthat...众所周知……Itisreportedthat...据报道……Itisbelievedthat...据信……;人们相信……Itissuggestedthat...有人建议……如:Itisbelievedthatatleastascoreofbuildingsweredamagedordestroyed.据信,至少有二十座楼房遭到破坏或彻底毁掉。1._____youdon’tlikehimisnoneofmybusiness.2._____hesaidatthemeetingshockededeverybodypresent3.________the2020OlympicGameswillbeheldinBeijingisnotknownyet.4.________we’llgocampingtomorrowdependsontheweather.5.________leavestheroomlastoughttoturnoffthelights.ThatWhatWhetherWhetherWhoever6.___isafactthatEnglishisbeingacceptedasaninternationallanguage.7.Itworriedherabit____herhairwasturninggrey.8.TheForeignMinistersaid,“__isourhopethatthetwosideswillworktowardspeace.”9._______Iexpectedtodoistotravelaroundtheworld.ItthatItwhat1.Hesaidthetextwasveryimportantandweshouldlearnitbyheart.2.Myworryisthathecangetthereontime.3.Thereasonwhyhefailedwasbecausehehadn’tstudiedhard.4.Whatweneedaretime.5.Herearetwobooks.Youcantakewhateveryouwant.isthatwhetherthatwhichever
