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1、语法精典讲解句法部分（从句）16从句的种类【从句的种类】（讲解1）一、名词性从句1.主要包括:主语从句、宾语从句、表语从句和同位语从句.一般由that引起,也可由who,whom,what,which,when,why,how,whether引起.Whatyouneedismorepractice.Thequestioniswhetheritisworthdoing.Wemustfindoutwhodidallthis.WeexpressedthehopethathewouldcometoChinaagain.2.主语从句很多情况下都可以放到句子后面,而用代词it作形式上的主语.Itis
2、n'tlikelythatIshouldacceptsuchanofferasthat.Itisstillaquestionwhenweshallhaveoursportsmeet.3.形式宾语.Ithinkitbestthatyoushouldstayhere.Shetookitforgrantedthathewouldreceiveitwithshame.16从句的种类【从句的种类】（讲解1）4.由名词性关系代词whatever,whoever,whichever等引起的宾语从句.Hewilldowhatevertheteacheraskshimtodo.I'lltakewhoeve
3、rwantstogowithmetothetheatre.Takewhicheveryoulikebest.5.whether,and,if都能引导从句,但用法有所不同.当主语从句直接位于句首时,应用whether,而不用if.Whether后能直接ornot,但if不能.Whetherhewillcomeornotisnotknown.6.在名词reason后的表语从句必须用that引导,不可误用because.Thereasonwhyheisoftenlateforclassisthathehasthebadhabitofgettinguplateinthemorning.16从句的
4、种类【从句的种类】（讲解2）二、定语从句1.引导定语从句的关系词有who,whom,whose,that,when,where,why,which.在非限制定语从句中,只可用which,who,whose,where,when.如果指代前面整个句子,多用which.Thedogthat/whichwaslosthasbeenfound.Thosewhoareinfavoroftheproposalareexpectedtodiscussitindetailafterthemeeting.Therearemanyorganizationswhosepurposeistohelpthehom
5、eless.Thedayswhenwehadtorelyonwool,cottonorsilkforourclotheshavenowpassed.Airmovesfromplaceswherethepressurewashightoplaceswherethepressureislow.Thisisthereasonwhyherefusedtohelpus.Hewasbornin1976,whenanearthquakestruckthecountry.Theyturnedablindeyetothesufferingofthepeople,whichenragedallofus.16
6、从句的种类【从句的种类】（讲解2）2.当引导定语从句的先行词前有all,any,no,little,much,veryfirst等词,或先行词前为形容词最高级所修饰时,或先行词为all,anything,nothing,something,everything时,从句的引导词只能用that.Theonlythingthatmatterstothechildrenishowsoontheycanhavetheirholiday.Thesearetheverypointsthatpuzzleme.Isthereanythingthatbothersyou?Thisisthebestfilmt
7、hatwaseverproducedbythecompany.3.as可做引导词引导定语从句,多和such,thesame连用.As引导的定语从句也可修饰整个句子,既可放在先行词后,也可放在句子开头.Suchpeopleasyoudescribearerarenowadays.Theboywasrunoverbyamotor-car,asoftenhappenedinpre-liberationShanghai.Asisoftent
