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1、语法专题二：名词性从句名词性从句常用关联词：连接词：that(无任何词意)whether,if(均表示“是否”表从句内容的不确定性)asif,asthough(均表示“好像”，“似乎”)以上在从句中均不充当任何成分连接代词：what,whatever,who,whoever,whom,whomever,which,whichever,whose连接副词：when,where,how,why1.名词性从句的基本概念：1)主语从句：在句中充当主语；亦可用it作形式主语，主语从句置于句末。2)宾语从句：在句中充当及物动词或介词的宾语；亦可用it作形式宾语，宾语从句置于句末。3)表语从
2、句：在句中充当系动词的表语。4)同位语从句：常置于fact,truth,idea,thought,news,promise,doubt,suggestion,advice,possibility,belief,problem,question,hope,order,information,message,evidence等抽象名词之后，用以说明其具体内容。判断下列句子中分别包含什么从句：Thattheearthgoesroundthesunisknowntousall.=Itisknowntousall______________________________________
3、_______.Whetherhe’scomingornotdoesn’tmattertoomuch.Whenandwherehewasbornisasecret.Theyrealizethatitisofgreatvaluetokeeptheiroriginallanguage.Canyouimaginewhatwillhappennext?ThatishowHenrysolvedtheproblem.Thefactisthatwehavelostthegame.Itlooksasifitisgoingtorain.Thenewsthathehadbeenkilledsurp
4、risedme.Youhavenoideahowworriedshewas!Weallknowthetruththattheearthgoesroundthesun.ThefactthatGreatBritainiscomposedofthreecountriesisstillunknowntomanypeople.Thesuggestionthatwecleantheroombyturnsisgood.Thesuggestionthatheputforwardatthemeetingisgood.Thenewsthathewillstudyabroadistrue.Thene
5、wsthathetoldmeistrue.思考：如何区分that引导的从句是定语从句还是同位语从句？2.注意：1)名词性从句要用陈述句语序。2)名词性从句中缺少主语、表语、宾语,且指代物或事，常用what引导（有范围限制时用which）。指人用who/whom/whoever/whomever。4缺少状语：用where（表地点）,when（表时间）,how（表方式）,why（表原因）。Shewillgive_________needshelpawarmsupport.Itisamatterof_______willtakechargeoftheproject.Iwanttokn
6、ow_______hehastoldyouabouthispresentjob.TherearesomanykindsofcellphonesonthemarketthatIdon'tknow_______Ishouldbuy.Idon'tunderstand_________theboyhassomanyquestions.Whentheshipwillarriveisstillunknown.Pleaseasktheguidehowwegettotheplace.Ican’tremember________IhaveputmyIphone.3)如不缺成份：主语从句、表语从句
7、、同位语从句用that引导，不能省略；单个动词后面的宾语从句可省略引导词that；介词宾从、第二个宾从，引导词that一般不省略；it作形式主语或宾语时，引导实际主从或宾从，一般that不省略；当宾语从句本身为复合句时，引导词that不省略。如：Hetoldussadlythatwhathehaddonesecretlywasdiscoveredbyhisparents.4)含宾从的复合句中，主句的谓语动词是现在时或将来时，从句的时态不受限制，根据实情，可用各种所需时态；如果主句的谓语动词是
