that-引导的名词性从句

that引导的名词性从句一that引导主语从句1.that引导主语从句时，that在从句中不充当成分，但不可以省略。e.g.Thatshegetsonwellwithherclassmatesisknowntousall.Thathewaschosenmadeusveryhappy.2.为了句子结构匀称，有时it被用作主语，that引导的主语从句则被置于主句的后面。e.g.Itisknowntousallthatshegetsonwellwithherclassmates.Itishopedthatonedaytheywillhaveenoughanimalstosetthemfree.类似结构常见的有如下几种：⑴Itisclear/certain/likely/right/wrong/surprising/truethat…⑵Itisapity/shame/goodidea/nowonderthat...⑶Itissaid/told/known/reported/suggested/believed/hoped/thoughtthat...⑷Itseems/happensthat...二.that引导宾语从句1.that引导宾语从句时，that在从句中不充当成分，一般可以省略，但在以下几种情况下不能省略：⑴当that从句和主句谓语动词之间有插入语或者从句主语之间有插入语时,that不可省略。e.g.Heannounced,believeitornot,thathewouldneverforgiveme.Hejudgedthat,becauseshewasawoman,shedidnotunderstandwine.⑵当that从句与另一名词性从句并列作宾语时，that不可省略.e.g.Everyonecouldseewhatwashappeningandthatshewasreallyworried.⑶当that作介词宾语时，that不能省略.e.g.Thereasonliesinthatheworksharderthananyoneelsedoes.2.为了句子结构匀称，有时it被用作形式宾语，that引导的宾语从句被放在主句的后面.e.g.Theymadeitarulethattheyhadapartyattheendofeverymonth.Ithinkitnecessarythatyoumasteraforeignlanguage.三.that引导表语从句that引导表语从句时，that在从句中不充当成分，但不可以省略.e.g.Thereasonwhyhewasabsentwasthathewasbadlyill.Theproblemwiththeprojectisthatweareshortofmoney.四.that引导同位语从句1.that引导同位语从句时，that在从句中不充当成分，但不可以省略.e.g.Ijustgotwordthatheisnotcomingthisevening.Thereisnodoubtthatyouareindanger.2.为了句子结构匀称，有时同位语从句和它前面的名词会被谓语动词隔开：e.g.Thewholetruthcameoutatlastthathewasawolfinsheep'sclothing.Wordcamethatanothernewresearchcenterwouldsoonbesetup.3.that引导同位语从句和that引导定语从句的区别⑴that引导同位语从句时，只起连接作用，在从句中不担当任何成分；that引导的同位语从句和它前面的名词之间是同位语关系，是具体说明前面名词的内容或含义的（同位语从句前面的名词常见的有：news,fact,thought,suggestion,truth,plan,belief,doubt,information,possibility,word,idea,order,hope,result等。）⑵that引导定语从句时，that在从句中作主语或宾语；that引导的定语从句和它前面的先行词之间是修饰与被修饰，限制与被限制的关系：e.g.Weallheardthenewsthatourteamwonthegame.(同位语从句)Weallheardthenewsthatwasbroadcastontheradio.(定语从句)