专题四名词性从句名词性从句(主语从句、宾语从句、表语从句、同位语从句)中连接词的运用名词性从句中的连接词有从属连词that/whether/if，连接代词what/who/which/whose/whatever/whoever/whomever/whichever，连接副词where/when/why/how/wherever/whenever。1.that的用法。(1)主语从句、表语从句、同位语从句中用that但不能省略。ThattheyaregoodatEnglishisknowntousall.Theproblemisthatwedon’thaveenoughmoney.Thereportthattherewillbeaseverestorminthenorthernareaisfalse.(2)一般情况下，宾语从句中的引导词that可省略，但在以下几种情况中that一般不省略：(A)当that从句和主句谓语动词之间有插入语时；(B)有多个that引导的从句时，第一个that可以省略，而其他的that常不可省略；(C)介词except，but，besides，in等后跟that引导的宾语从句时；(D)当when，who，what，where，why，how等引导的从句与that引导的从句作主句谓语动词的并列宾语时。Hejudgedthat，becausehewasachild，hedidnotunderstandwine.Thereasonliesinthatsheworksharderthantheothersdo.Everyoneknewwhathappenedandthatshewasworried.(3)that和what的区别。that引导名词性从句时，在主从句中不担当任何句子成分，也没有任何含义；而what引导名词性从句时，在主从句中都要充当一定的句子成分，what可以分解成定语从句中的“先行词＋关系代词”，即常说的“先行词＋that/which/who”。It’sashamethathehasmadesuchamistake.IwilldowhatIcan(do)tohelphim.(4)同位语从句与定语从句中that的区别。同位语从句中的连接词that只起连接作用，在从句中不担当任何句子成分；而定语从句中的关系代词that在句中作宾语或主语，与先行词有修饰关系。如果句子是同位语从句，就应用连接词that而不能用which。同位语从句一般放在表具体含义的名词后解释说明名词的含义或内容，如以下名词：news，fact，suggestion，truth，plan，belief，doubt，possibility，idea等，而定语从句只是对先行词的限定和修饰。TheyexpressedthehopethattheywouldcometovisitChinaagain.(同位语从句)ThehopetheyexpressedisthattheywouldcometovisitChinaagain.(定语从句)2.whether和if的用法。(1)whether和if在宾语从句中可以互换，但是作介词宾语时连接词一般用whether。Italldependsonwhethertheywillcomeback.(2)后面直接跟ornot时用whether。Ididn’tknowwhetherornothehadarrivedinWuhan.(3)主语从句、表语从句中只能用whether。Whetherthemeetingwillbeputoffhasnotbeendecidedyet.Thequestioniswhethertheyhavesomuchmoney.(4)whether可以引导同位语从句，用以说明前面的名词的内容，if则不能。Weoughttodiscusscarefullythequestionwhetherwecandoitornot.(5)whether常与or连用表示一种选择，if不能这样用；whether也可与动词不定式连用但if不能。Thequestionofwhethertheyaremaleorfemaleisnotimportant.Ihavenotdecidedwhethertogoornot.(6)间接宾语位于句首时或者间接宾语提前时用whether不用if。Thankyou，butwhetherI’llbefreeI’mnotsureatthemoment.(7)whether可引导一个让步状语从句表示“不管”、“无论”，而if不能。Whetherhecomesornot，wewillbeginourpartyontime.3.疑问词＋-ever和nomatter＋疑问词的区别。(1)疑问词＋-ever可引导名词性从句，在主从句中要充当一定的成分。Whoeverbreakstherulemustbepunished.Youcanchoosewhateveryoulikeintheshop.(2)疑问词＋-ever还可引导让步状语从句。Whoeverbreakstherule，hemustbepunished.Whateveryoudo，youmustdoitwell.(3)nomatter＋疑问词只能引导让步状语从句。Nomatterwhatyoudo，youmustputyourheartintoit.Nomatterwhocomeslate，hemustbepunished.4.when和where引导的同位语从句与定语从句的区别。when和where前面的名词若是表示时间、地点的名词，则when和where引导的是定语从句，否则则为同位语从句。Theyputforwardthequestionwheretheycouldgetthemoney.(同位语从句)Thisistheplacewheretheaccidenthappened.(定语从句)主语从句的核心考点1.主语从句在复...
