Unit4第3課時

Grammar名詞性從句之主語從句標

展示目1.了解并掌握主語從句的相關概念2.完成與主語從句相關的練習3.重點：It做形式主語的各種句式及虛擬語氣的使用。4.難點：引導主語從句的連接詞的使用。

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找出下列各句的相似之處Whathedidissurprising.2.Thatwegoswimmingeverydaydoesusalotofgood.3.Whenwe'llfinishtranslatingthebookdependsonthetime.4.Whoevermakesmistakesmustcorrectthem.主學習自主Turntopage53inyourworkbookandseenote1，2.學習任務：1.了解主語從句的定義2.掌握引導主語從句的連接詞的用法。

定義：用作主語的從句叫主語從句，它是名詞性從句之一。引導主語從句的連接詞有：連詞that,whether；連接代詞who,what和which；連接副詞when,where,how和why.Continuetolookatnote3.1.連詞that，whether在主語從句中做成分嗎？2.連詞if能引導主語從句嗎？3.連接代詞who,what和which在主語從句中能做什么成分？4.連接副詞when,where,how和why在主語從句中能做什么成分？if可以引導主語從句,但不能用于句首,而應該放在句尾,用it做形式主語."whether"與"If"做“是否”講引導名詞從句,區(qū)別如下:If1.不能用在句首2.不能引導主,表,同從句3.可以引導賓語從句,但不用在介詞之后知識小結連接代詞，也稱疑問代詞。一共九個,包括：who,whom,whose,what,which,whoever,whomever,whatever，whichever,代詞相當于名詞，因此，連接代詞在主語從句中可做主賓表同。知識小結作探究合1.他們是否賣掉這所房子還沒有決定。________theywillsellthehouseisnotyetdecided.這里能用if代替whether嗎？為什么？if可以引導主語從句,但不能用于句首,而應放在句尾,用it做形式主語.漢譯英2.凡是這里說的話都應當保密。_______wassaidheremustbekeptsecret.3.凡犯了錯誤的人都必須改正。_______makesmistakesmustcorrectthem.問題：1.whenever/wherever能引導主語從句嗎？4.老師今天說的話是十分正確的。_______theteachersaidtodaywasquiteright.5.他們急需幫助，這是十分明顯的。_______theyarebadlyinneedofhelpisquiteclear.漢譯英引導主語從句時，什么情況下用that，什么情況下用what？小提示：由連詞that引起的主語從句,這類句子在大多數(shù)情況下會放到整個句子的后部去，而用代詞it作形式主語。主學習自主Continuetolookatnote41)Itis+adj./n.+從句

Itisapity/shamethat...遺憾的是……

Itispossiblethat...很可能……

Itisunlikelythat...不可能……

2)It+不及物動詞+從句Itseems/appearsthat...似乎……

Ithappenedthat...碰巧……3)It+be+過去分詞+從句Itissaidthat...據(jù)說……Itisknowntoallthat...眾所周知……Itisreportedthat...據(jù)報道……Itisbelievedthat...據(jù)信……;人們相信……

Itissuggestedthat...有人建議……Continuetolookat5特殊強調(diào):用于Itis+important/natural/necessary/impossible/或表示建議要求命令的詞的過去分詞+that...句型中,主語從句應使用虛擬語氣,謂語動詞用\“should+動詞原形”的形式。饋練習反1._____hesaidatthemeetingastonishedeverybodypresent.2.________the2000OlympicGameswillbeheldinBeijingisnotknownyet.3.________we’llgocampingtomorrowdependsontheweather.4.________leavestheroomlastoughttoturnoffthelights.WhatWhetherWhetherWhoever

6.___isafactthatEnglishisbeingacceptedasaninternationallanguage.7.Itworriedherabit____herhairwasturninggrey.8.TheForeignMinistersaid,“__isourhopethatthetwosideswillworktowardspeace.”

9.AfterYangLiweisucceededincirclingtheearth,____ourastronautsdesiretodoiswalkinginspace.ItthatItwhat擊高考直1.Theotherday,mybrotherdrovehiscardownthestreetat__Ithoughtwasadangerousspeed.(2004上海春38)A.asB.whichC.whatD.that解析:Ithought是插入語,可以把它去掉不考慮.what引導賓語從句,在從句中作主語.賓語從句作at的賓語.2.___intheregulationsthatyoushouldnottellotherpeoplethepasswordofyouremailaccount.（2005上海-38）A.WhatisrequiredB.WhatrequiresC.ItisrequiredD.Itrequires解析:“Itisrequiredthat…”是一個固定句式，it作形式主語,that引導的從句為真正的主語。3.___the2000OlympicGameswillbeheldinBeijingisnotknownyet.[高考真題]A.WheneverB.IfC.WhetherD.That答案是C?！?000年奧林匹克運動會是否在北京舉行還不知道?！?.___hesaidatthemeetingastonishedeverybodypresent.[高考真題]A.WhatB.ThatC.WhichD.Whether答案是A?！八跁系陌l(fā)言使到會的每一個人都感到驚訝”what表示“(所說的話)”,相當于Thewords(that+/which)hesaidatthemeeting…5.___hehasbecomearichmanisknowntoallinourtown.[高考真題]A.BecauseB.ThatC./D.What答案是B?！八兂闪烁晃?這是我們鎮(zhèn)上下班人人皆知的事。”根據(jù)句意,須用that引導的主語從句。that在從句中不擔任任何成分,只起連接作用.That引導主語從