名词性从句种类内容说 明例 句宾语从句：一个句子做动词（短语）或介词的宾语引导词由that引导，在宾语从句中不充当成分，可省略。Hesaid(that)hewantedtostayathome.Iamsure(that)youwillsucceed.if或whether引导的宾语从句Heaskedmewhether(if)Icouldhelphim.连接代词who,whom,whose,what,which引导，在宾语从句中充当主语、宾语等成分。Doyouknowwho(whom)theyarewaitingfor?Heaskedwhosehandwritingwasthebest.连接副词when,where,why,how引导，在从句中做时间、地点、原因、方式状语等。CanyoutellmewheretheNo.3busstopis？Idontknowwhythetrainislate.Pleasetellmewhenwellhavethemeeting.语序宾语从句用陈述句语序CanyoutellmehowIcangettozoo?时态如果主句的时态是一般现在时，宾语从句该用什么时态就用什么时态。Idontthink(that)youareright.Pleasetelluswhereheis.CanyoutellmehowIcangettothestation?如果主句时态是一般过去时，宾语从句只能用相应的过去时态（一般过去、过去进行、过去将来、过去完成时）Heaskedwhattimeitwas.Hetoldmethathewaspreparingfortheexam.HeaskedifyouhadwrittentoPeter.HesaidthathewouldgobacktotheU.S.soon.如果宾语从句是客观真理，其时态常用一般现在时。HesaidthatJanuaryisthefirstmonthoftheyearScientistshaveprovedthattheearthturnsaroundthesun.类型多数动词后都可跟宾语从句Hetoldusthattheywouldhelpusthoughthewholework.大部分“动词+副词”结构也可以带宾语从句Ihavefoundoutthatalltheticketshavebeensoldout.Canyouworkouthowmuchwewillspendduringthetrip？动词短语也可以带宾语从句：makesure，keepinmind，makeuponesmind，Makesurethattherearenomistakesinyourpapersbeforeyouturnthemin.We should keep in mind that theres usually more than one way to solve the same problem.作介词的宾语Oursuccessdependsonhowwellwecancooperatewithoneanother.形容词宾语sure,certain,glad,please,happy,sorry,afraid, satisfied,surprisedIamsureIwillpasstheexam.IamsorrythatIhavetroubledyousolong.HeisgladthatLiMingwenttoseehimwhenhewasill.形式宾语it动词find,feel,consider,make,believe等后面有宾语补足语的时候,则需要用it做形式宾语而将that从句后置.Ithinkitnecessarythatwetakeplentyofwatereveryday.IfeelitapitythatIhaventbeentotheget-together.IhavemadeitarulethatIkeepdiaries.Weallfinditimportantthatwe(should)makeaquickdecisionaboutthismater.有些动词带宾语从句时需要在宾语与从句前加it，这类动词主要有：hate,take,owe,have,seeto.Ihateitwhentheyeat withtheirmouthsfulloffood.Hewillhaveitthatourplanisreallypractical.Wetakeitthatyouwillagreewithus. See to it that the door is safely locked务必锁好门。We saw to it that the child was fed and bathed若宾语从句是wh-类,则不可用it代替Weallconsiderwhatyousaidtobeunbelievable.Wediscoveredwhatwehadlearnedtobevaluable.种类内容说 明例 句主语从句：一个句子做主语引导词由that引导，在主语从句中不充当成分，不可省略。Thatyouwillwinthemedalseemsunlikely.Thatshesurvivedtheaccidentisamiracle.whether引导的主语从句Whetherwewillholdapartyintheopenairtomorrowdependsontheweather.Whethersheiscomingornotdoesntmattertoomuch.连接代词who,whose,whom,which,what;whoever,whomever,whichever,whatever引导的主语从句，在从句中充当主语、宾语等成分。Whatyouneedismorepractice.WhatIwanttoknowisthis.Whateverwedoistoservethepeople.Whoeverbreaksthelawshouldbepunished.（主语从句）Anyonewhobreaksthelawshouldbepunished.）Whoeverbreaksthelaw,heshouldbepunished.（让步）Nomatterwhobreaksthelaw,heshouldbepunished.when,where,why,how引导，有意义，在从句中做状语。Whereweshouldleavemy dictionaryisaproblem.Whentheywillcomehasntbeenmadepubic.语序主语从句用陈述句语序见例句。it做形式主语it构成的主语从句Thatlighttravelsinstraightlinesisknowntoall.=Itisknowntoallthatlighttravelsinstraightlines.Whentheplaneistotakeoffhasnotbeenannounced.=Ithasnotbeenannouncedwhentheplaneistotakeoff.what引导主语从句表示“的东西”时，不用it作形式主语错：Itisabookwhathewants.对：Whathewantsisabook.Itis+名词+从句apity；awonder；agoodthing；nowonder；surprise等Itisamysterytomehowitallhappened.Itiscommonknowledgethatthewhaleisnotafish.ItisnosurprisethatBobshouldhavewonthegame.Itsapitythatyoumissedthefilm.Itis+形容词+从句sure,certain,glad, happy,sorry,afraid, satisfied,surprised,pleased,Itisdoubtfulwhethershewillbeabletocome.Itwasreallyastonishingthatherefusedtotalktoyou.Itisessentialthatheshouldbeherebytheweekend.Itseemsobviousthatwecannotgoonlikethis.Itisnecessarythatyou（should）masterthecomputer.ItisimportantthatastudentlearnEnglishwell.Itsclearthattheybadlyneedhelp.Itislikelythatahurricanewillarrivesoon.tis+过去分词+从句known;estimated;expected;believed;thought;hoped;noted;discussed;required;Itisthoughtthatheisthebestplayer.Itisestimatedthatthevaseis2000yearsold.Itisusedtobethoughtthatanewstarmustbeduetoacollisionbetweentwostars.Ithasnotbeenmadeclearwhenthene