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1、TheSentenceEffectiveSentencesAccordingtotheusagesofthesentences:1)Declarativesentences2)Interrogativesentences3)Imperativesentences4)ExclamatorysentencesAccordingtothestructuresofthesentences:1)simplesentences2)Compoundsentences3)ComplexsentencesTypesofsentencesAccordingt
2、oRhetoric[‘retərik]（修辞学）Loose,PeriodicandBalancedsentencesLooseSentences松散句或散体句Aloosesentenceputsthemainideabeforeallsupplementaryinformation;Inotherwords,itputsfirstthingsfirst,Andletsthereaderknowwhatitismainlyaboutwhenhehasreadthefirstfewwords.Ex:Iamwillingtopayslightl
3、yhighertaxesfortheprivilegeoflivinginCanada,consideringthefreehealthcare,thecheaptuitionfees,thelowcrimerate,thecomprehensivesocialprograms,andthewonderfulwinters.ThemainpointofthissentenceisthatthewriterpreferstoliveinCanada,andthewritermakesthepointattheverybeginning:ev
4、erythingwhichfollowsissimplyextrainformation.LoosesentencesLoosesentenceistheonewhichthemainideaisplacedfirstNosuspenseisattempted.Itgoesstraighttothepointsothatthereadergetsitbeforehecomestotheendofthesentence.Loosesentencesareeasier,simpler,morenaturalanddirect.Periodic
5、Sentences掉尾句/圆周句/整体句Aperiodicsentence:Themainideaisexpressedatorneartheendofit,Anditisnotgrammaticallycompleteuntiltheendisreached.Thereaderdoesnotknowwhatitismainlyaboutuntilhefinishesreadingit.Itismorecomplex,emphatic,formalandliterary.PeriodicSentencesItisimportanttore
6、memberthatperiodicsentences:Usedonceortwiceinapieceofwriting,theycanbeveryeffective;Usedanymorethanthat,theycanmakeyousounddullandpompous（浮夸）.Examplesa.ShedecidedtostudyEnglishthoughshewasinterestedinmusic.b.Althoughshewasinterestedinmusic,shefinallydecidedtostudyEnglish.
7、ThemainideaofbothsentencesisthefactthatshedecidedtostudyEnglish.Thisideaisputatthebeginningofthefirstsentenceandattheendofthesecond,thusmakingonealoosesentenceandtheotheraperiodicone.Examplesa.ShedecidedtostudyEnglishthoughshewasinterestedinmusic.b.Althoughshewasintereste
8、dinmusic,shefinallydecidedtostudyEnglish.Besides,thefirstpartofthefirstsentenceiscompleteinstruc
