Unit 1 Grammar and usage 课件

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1、Unit1Grammarandusage课件一.相关概念1.名词：表示人或事物的名称的词叫名词。2.名词的句法作用：名词在句中主要作主语、宾语、表语和同位语。另外还可以作定语、状语。3.名词性从句：在英语的句子结构中，本来该由名词充当的主语、宾语、表语和同位语，由一个句子来充当，这个句子就叫名词性从句。4.名词性从句的种类：根据名词性从句在句子中所充当的不同成分，名词性从句可以分为主语从句、宾语从句、表语从句和同位语从句。名词性从句nounclause主语从句subjectclause宾语从句objectcla

2、use表语从句predicativeclause同位语从句appositiveclause1.Whenwewillstartisnotclear.2.MrsBlackwon’tbelievethathersonhasbecomeathief.3.Myideaisthatweshoulddoitrightnow.4.Ihadnoideathatyouwereherfriend.主语从句宾语从句表语从句同位语从句名词性从句的种类1.主语从句：从句在句中充当主语成分1).Thathewillsucceediscert

3、ain.2)Whetherhewillgothereisnotknown.3)Whathesaidisnottrue.4)Wherehehidthemoneyistobefoundout.5)Whoevercomesiswelcome.6)It’scertainthathewillsucceed.7)Howwecanhelpthetwinswillbediscussedatthemeeting.8)Whenthey’llstarttheprojecthasnotbeendecidedyet.It的用法：（形式主

4、语）It’possible/important/necessary/clear…that……很可能/重要的是…/必要的是…/很清楚…It’said/reported…that..据说/据报道…It’sbeenannounced/declaredthat..已经通知/宣布…Itseems/appears/happens..that…显然、明显、碰巧..It’snowonderthat…并不奇怪/无疑…It’sapity/afact/acommonknowledge(众所周知）/acommonsaying….（俗话

5、说）1).whether可以引导主语从句,但if不能.2).为避免主语冗长,句子头重脚轻,经常用it作形式主语,主语从句放在后面作真正的主语.注意点2.用if或whether填空1.Idon’tknow_______I’llbefreetomorrow.2.Idon’tknow_______ornotI’llbefreetomorrow.3.Thequestionis______thisbookisworthwriting.whether/ifwhetherwhether4.Itdependson______w

6、ewillhaveenoughmoney.5.______theycandoitmatterslittletous.6._______youarenotfreetomorrow,I’llgowithoutyou.归纳:a.主语从句、表语从句、同位语从句、介词后面的宾语从句只能用whether，不能用if；b.后面紧跟ornot时,用whetherwhetherwhetherIfItiswellknown/reported/thought/said…that…Itisclear/necessary/certain

7、/true/doubtful…that…Itisapity/ashame/anhonour/that…Itdoesn’tmatterwhether…Itseemsthat…Ithappensthat…2.宾语从句：从句在句中充当宾语成分（可以作谓语动词、介词、不定式等非谓语动词的宾语）连词：that,whether，if（that常可省略）who,what,which,whoever,whatever,whenwherewhyhow1).Theyknowthatthehabitwillkillthem.2).I

8、talldependsonwhethertheywillsupportus.3)HeaskedhowmuchIpaidfortheviolin.4).Hemadeitcleartothepublicthathedidanimportantandnecessaryjob.5).Ifinditnecessarythatweshoulddothehomework.1).whether和if都