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1、全力直击英语语法第50讲主语从句（TrytowatchEnglishgrammarfiftieth）TrytowatchEnglishgrammarfiftieth1.wordorderofsubjectclausesAwordorder,ratherthanageneralinterrogativesentence,isrequired.Suchas:What,surprised,me,most,was,the,little,that,girl,could,play,,the,violin,so,well.Tomy
2、surprise,thelittlegirlplaystheviolinverywell.How,he,was,successful,is,still,a,puzzle.Howhesucceededisstillamystery.2.,thechoiceofconjunctions(1)selectionofthatandwhat;Boththatandwhatcanguidesubjectclauses.Inadditiontowhatconnection,assomecomponentsstillinnouncl
3、auses,canbeusedasthesubject,objectorpredicativeclause.Whilethatdoesnotactasacomponentinnounclauses,withoutmeaning,itonlyactsasconnectives.Suchas:Whathewantsisabook..Whathewantsisabook.That,light,travels,in,straight,all.,lines,is,known,to,andasweallknow,lighttra
4、velsinastraightline.(2)selectionofifandwhether;Youcan'tuseiftoguidesubjectclauses.Youcanonlyusewhether.Suchas:Whether,we,will,hold,a,in,the,party,open,air,tomorrow,,depends,on,the,weather.Whetherwe'llhaveapartyintheopentomorrowdependsontheweather.(3)thechoiceof
5、otherconjunctivepronounsandadverbsAccordingtothespecificmeaningofthesubjectclause,thecorrectchoiceofwho,which,when,where,why,howandotherconjunctions,theseconjunctionshavebothinterrogativemeaningandconnection,andatthesametimeintheclauseasavarietyofcomponents.Suc
6、has:When,we,shall,hold,our,sports,meet,is,not,decided..Whenwehavethesportsmeethasnotbeendecidedyet.Who,broke,the,glass,yesterday,is,not,clear.,it'snotclearwhobroketheglassyesterday.Which,car,you,will,choose,to,buy,difference.,makes,no,andyouwillnotmakeanydiffer
7、enceindecidingwhichcartobuy.(4)thefunctionofwhatever/whoeverWhateverandwhoeverdonotcontaininterrogativemeaningsinsubjectclauses.Itguidesthesubjectclause,andtheclauseassubject,object,predicative.Whatever=anythingthat;whoever=anyonewho.Noticethedifferencebetweent
8、headverbialclauseofconcessionthatwhateverandwhoeverlead.Suchas:Whoever,breaks,the,law,should,be,punished.(subjectclause)(=Anyone,who,breaks,the,,law,should,be,punished.)Whoe
