[语法综合讲解与练习]名词性从句课件上课讲义.ppt

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1、名词性从句NOUNCLAUSESsnowingfox在复合句中充当主语、宾语、表语、同位语、介词宾语的句子叫做名词性从句。名词性从句主语从句表语从句宾语从句同位语从句连接副词how,why,when,wherehowever,wherever,whenever,how构成的短语，（howmany/much/Long/soon/often…)在名词性从句中一律用陈述句的语序，即使从句表达的是疑问含义。Theproblemiswhathehasdonetothelittleboy.Whathashedonetothelittleboy?Ca

2、nwedrinkwaterbeforemedicalexamination?Theproblemiswhathehasdonetothelittleboy.Idon’tknowwhetherifwecandrinkwaterbeforethemedicalexamination.WhyshouldwelearnEnglishwell?WhyweshouldlearnEnglishwelldoesn’tneedanyfurtherexplanation.1.主语从句在句中作主语的句子叫主语从句。主语从句通常由从属连词that，wheth

3、er和连接代词what,who,which,whatever,whoever以及连接副词how,when,where,why等词引导。1.that在从句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当成分。ThatwemustmasterEnglishwordsasmanyaspossibleisveryimportant.Whowillwinthematchisstillunknown.WheretheEnglisheveningwillbeheldhasnotyetbeenannoun

4、ced.Thathestoleabikewastrue.Whathewantstotellusisnotclear.单个的主语从句作主语时，谓语动词用单数形式。如果是两个或两个以上的主语从句作主语，谓语动词则用复数形式。Whereandwhenhewasbornhasnotbeenfound.Whenthepersonwasmurderedandwhyhewasmurderedarestillunknown.有时为避免句子头重脚轻，常用it代替主语从句作形式主语放于句首，而把主语从句置于句末。主句的谓语动词一般用单数形式。常用句型如下：

5、1）It+be+名词+that从句afact,agoodidea,anhonor,amystery,aquestion,apity,ashame,apleasure,awonder,challenge,commonknowledge,fun,progress.Itisacompletemysteryhowtheprisonerescaped.Itiscommonknowledgethatthewhaleisnotfish.2）It+be+形容词+that从句Amazing,appropriate,better,certain,clear

6、,evident,good,important,likely,lucky,unlikely,Probable,natural,necessary,plain,possible,true,wrong.Itiscertainthatyoursonwillwininhisexamination.Itisverydifficultwhatyouadoning.3）It+不及动词+that从句Appear,follow,happen,matter,occurtosb,seem.Itnowappearsthattheyareinurgentneed

7、ofhelp.IthappenedthatIwasnottherethatday.Itsuddenlyoccurredtohimthatthekeysmightbeleftinthecar.4）It+be+动词的过去分词+that从句accepted,admitted,announced,arranged,believed,decided,demanded,estimated,expected,found,hoped,known,noted,pointedout,proved,reported,rumored,said,seen,sho

8、wn,stressed,suggested,unknown.Itisknowntoushowhebecameawriter.Ithasnotbeendecidedwhowillperformtheopera