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1、英语主语和主语从句精简讲解01英语主语句子成分概述S十V主谓结构S十V十F主系表结构S十V十O主谓宾结构S十V十O1十O2主谓双宾结构S十V十O十C主谓宾补结构主语主语指句子主要说明的人或事物，一般由名词，代词，数词，不定式，动名词，从句等充当。(一)词类作主语1．名词作主语Tom,uncle,friend,horse,whale,insect,tree,flower,house,idea,light,honesty,British等Thehunterkilledthelion. (Thecityfamousforitsbeauty)isnotfar
2、away.2．代词作主语they,ours,both,everybody,that,some,who,which,few等 Iamhungry.Whichisthebest?3．数词作主语three,first,two-thirds,percent,quarter等(Two-thirdsofthestudents)areboysinourschool.4．the+形容词/v-ed/v-ing结构作主语。(1)Theyoungshouldrespecttheold.(2)Thedyingandthewoundedneededhelp.(3)Thewou
3、ndedhavebeensenttohospitalandthelostarebeingsearchedfor.(二)非谓语类作主语1．不定式作主语(通常用it作形式主语)(1)Toremembertoswitchofftheelectricityisimportant.(2)Itisapitynottogototheconcertwithyou.(3)Ittookusfivehourstogethere.疑问词+to复合结构Whattodonexthasn'tbeendecided2．V-ing（动名词）作主语(通常用it作形式主语)Smoking
4、isbadforyourhealth.Buyingclothescostheralotofmoney.(1)Itisnogoodcomplaining.(2)Itisnousearguingwithhim.注意：(1)Itisimportantlearningforeignlanguages.(误)(2)Itisimportanttolearnforeignlanguages.(正)V-ing作主语通常表示抽象动作，而不定式结构作主语通常表示具体动作。(1)It'snousecryingoverspiltmilk.(2)Herealizedthatt
5、ogoonlikethiswasnouse.(三)从句类作主语1．that从句作主语(通常用it作形式主语)(1)Thathewillsucceediscertain.Thathecamelatemadeusworried.(2)Itwasobviousthatthedrivercouldnotcontrolhiscar.[注意]that从句放于句首时，that不能省略。2．wh-从句作主语注意用陈述语序主语从句大多数情况下视为单三,但也有例外Whatweneedistime.Whatweneedaregooddoctors.Whatcausedth
6、eaccidentremainsunknown.Whowasresponsiblefortheaccidentisnotyetclear.Itisnotclearwhowasresponsiblefortheaccident.Itisnotknownwhenhedidit.Itisnotimportantwhetheryouareamaleorafemaleinthejob.3．注意连接代词whoever,whatever,whichever等引导主语从句的含义Whoevercomeswillbewelcome.(whoever=thepersonw
7、ho)Whateverhedidwasright.(whatever=thethingthat) (四)it用作形式主语接从句句型1. It+be+形容词+that从句。(obvious,true,natural,surprising,good,wonderful,funny,possible,likely,certain,probable,)Itiscertainthatshewilldowellinherexam.Itisprobablethathetoldhereverything.2. It+be+名词词组+that从句。(nowon
8、der,anhonour,agoodthing,apity,nosurprise,etc.)It’sapit
