名词性从句--主语从句

1、名词性从句（一）,主语从句,主语从句,把两句话合并成一句话1.Tomwillwinthetennisgame.Itseemsimpossible.ThatTomwillwinthetennisgameseemspossible.,主语,连系动词,表语,ThatTomwillwinthetennisgameseemspossible.,连系动词,表语,主语从句,主句,主语从句：在主句中担当主语的是一个从句，这个从句就叫主语从句。引导词：从属连词：that,whether关系代词：who,whom,whatwhich,whose关系副词：when,where,why,由that引导主语从句,例句：

2、把两句话合并成一句话Lighttravelsinstraightlines.Itisknowntoall.Thatlighttravelsinstraightlinesisknowntoall.2.Weshouldwashourhandsbeforemeals.Itisnecessary.Thatweshouldwashourhandsbeforemealsisnecessary.,由that引导主语从句,把两句话合并成一句话3.Everystudentshouldhaveastudyplan.Itisnecessary.Thateverystudentshouldhaveastudyplan

3、isnecessary.4.Studentssayhellototheirteachers.Itispolite.Thatstudentssayhellototheirteachers.ispolite.,由that引导主语从句,把两句话合并成一句话5.Yourmotherdidntattendthepartyyesterday.Itisapity.Thatyourmotherdidntattendthepartyyesterdayisapity.6.Tomstolehisclassmatesmoney.Itisafact.ThatTomstolehisclassmatesmoneyisafa

4、ct.,由that引导主语从句,把两句话合并成一句话7.Therewillberainytomorrow.Itispossible.Thattherewillberainytomorrowispossible.8.Teenagerssmoke.Itiswrong.Thatteenagerssmokeiswrong.,由whether（“是否”）引导的主语从句,Willhegoabroad?Itisnotknown.Whetherhewillgoabroadisnotknown.2.Willitraintomorrow?Itisnotknown.Whetheritwillraintomorrow

5、isnotknown.3.Isheapoliceman?Itisnotclear.Whetherheisapolicemanisnotclear.4.Isthefilmstarhappy?Itisnotclear.Whetherthefilmstarishappyisnotclear.,由whether（“是否”）引导的主语从句,在主语从句中只能用whether（是否），此意义时不能用if替换。,我是大王我说了算,形式主语It代替that主语从句,ThatwestudyEnglishwellisnecessary.ItisnecessarythatwestudyEnglishwell.,我是傀

6、儡,形式主语,真正主语,第一种：形式主语It代替that主语从句,Itis+名词+that从句ItisapitythatItisashamethatItisafactthat.Itisanhonorthat.等等,形式主语It代替that主语从句,1.ThatJohnwonagoldmedalisafact.ItisafactthatJohnwonagoldmedal.2.ThatImissedthebeginningofthefilmisapity.ItisapitythatImissedthebeginningofthefilm.3.Thatwewillgotravellingisgood

7、news.Itisgoodnewsthatwewillgotravelling.,4.Thatmymotherlosthernewwalletisapity.Itisapitythatmymotherlosthernewwallet.5.ThatMarrymarriedablindmanisapity.ItisapitythatMarrymarriedablindman.6.ThatMarrytoldalietoherhead-teacherisasurprise.ItisasurprisethatMarrytoldalietoherhead-teacher.,第二种：形式主语It代替that

8、主语从句,ItisimportantthatItisnecessarythatItispolitethat.Itiswrongthat等等,Itis+形容词+that,把两句话合并成一句话,例句ThatlighttravelsinstraightlinesisrightItisrightthatlighttravelsinstraightlines.Thathegotagoldmedalisreal.Itisrealthathegotagoldmedal.,把下列句子用it做形式主语,ThatTomwillwinthegameispossible.ItispossiblethatTomwill

9、winthegame.2.Thatweshouldwashourhandsbeforemealsisnecessary.Itisnecessarythatweshouldwashourhandsbeforemeals.3.Thatwemustcompletethisworkbefore5oclcockisnecessary.Itisnecessarythatwemustcompletethisworkbefore5oclcok.,第三种：形式主语It代替that主语从句,It+不及物动词+that1)ThatImetmyGeographyteacherinthestreethappened.I

10、thappenedthatImetmyGeographyteacherinthestreet.2)ThatIpickedaredwalletonthewaytoschoolhappened.IthappenedthatIpickedaredwalletonthewaytoschool.3)Thatthemanagerandthebosswenttravellinghappened.Ithappenedthatthemanagerandthebosswenttravelling.,第四种:形式主语It代替that主语从句,It+be+过去分词+thatItissaidthat据说.Itisrep

11、ortedthat据报道Itisknowntoallthat.众所周知.Itisbelievedthat.人们相信Itisthoughtthat.人们认为.,It+be+过去分词+that,ThathisfatherhasgonetoTianjinissaid.ItissaidthathisfatherhasgonetoTianjin.2.Thattenpersonsdiedintheaccidentisreported.Itisreportedthattenpersonsdiedintheaccident.3.Thattheearthwasnotroundwasbelievedinancie

12、nttimes.Itwasbelievedinancienttimesthattheearthwasnotround.,It+be+过去分词+that,4.ThatitwillraintomorrowisbelievedItisbelievedthatitwillraintomorrow.5.Thatthewaiterworkshardisthought.Itisthoughtthatthewaiterworkshard.6.ThattheAmericanpresidentwillvisitChinaisreported.ItisreportedthattheAmericanPresident

13、willvisitChina.,that省略问题,Thatitwillraintomorrowisbelievedthat放句首不能省略Itisbelievedthatitwillraintomorrow.that放在句尾不省略，但偶尔在口语中有省略的。,关系代词：whatwhichwhowhom等引导主语从句,例句Whomdidtheboyhelp?Sheisanoldwoman.Whomtheboyhelpedisanoldwoman.Wheredoeshelive?ItisBeijing.WherehelivesisBeijing.,关系代词：whatwhichwhowhom等引导主语从

14、句,把两句话合并成一句话1.Whatdotheirparentsneed?Itismoreexperience.Whattheirparentsneedismoreexperience.2.WhichdoctorswillbesenttoWenchuan?Ithasnotbeendecided.WhichdoctorswillbesenttoWenchuanhasntbeendecided.3.Whatcolordoesthegirllike?Itispink.Whatcolorthegirllikesispink.,关系代词：whatwhichwhowhom等引导主语从句,把两句话合并成一句

15、话4.Whatdidhelose?Itisabrownhandbag.Whathelostisabrownhandbag.5.WhichteacherwillteachthestudentsGeography.Ithasntbeendecided.WhichteacherwillteachthestudentsGeographyhasntbeendecided.,关系副词：wherewhywhen引导主语从句,Wheredidhego?Ithasntbeenknown.Wherehewenthasntbeenknown.2.Whyishelateforschool?Itisnotclear.Whyheislateforschoolisnotclear.3.Whendoestheplanetakeoff?Itisclear.Whentheplanetakesoffisclear.4.Wheredoesheoftengoforawalk?Itisinthepark.Whereheoftengoesforawalkisinthepark.,关系副词：wherewhywhen等引导主语从句,1.Whyisthebabycrying？Ithasnotbeenkn