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.?Itisn'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'lltakewhoeverwantstogowithmetothetheatre.?Takewhicheveryoulikebest.5.whether和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.?Therearemanyorganizationswhosepurposeistohelpthehomeless.?Thedayswhenwehadtorelyonwool,cottonorsilkforourclotheshavenowpassed.?Airmovesfromplaceswherethepressurewashightoplaceswherethepressureislow.?Thisisthereasonwhyherefusedtohelpus.?Hewasbornin1976,whenanearthquakestruckthecountry.?Theyturnedablindeyetothesufferingofthepeople,whichenragedallofus.16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.onlythingthatmatterstothechildrenishowsoontheycanhavetheir?Theholiday.?Thesearetheverypointsthatpuzzleme.?Isthereanythingthatbothersyou??Thisisthebestfilmthatwaseverproducedbythecompany.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.?Theboywas