03it 的用法.docx

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1、语法精讲it用法作代词1、代替指示代词thisythato一What,sthis?一Ifsapen.-Whosehatisthat?一It,sMary,s2、表示时间、日期、季节、天气、光线明暗、温度、距离、环境等。1. Whattimeisit?-It,sfiveo,c1ock.2. Itrainsa1otinsummer.3. Itwassnowingwhentheaccidenthappened.4. It,stwohours,drivetothebeachfrommyhome.3、指代身份不明的人或物；指代有生命但不能或不必区分性别的人或动物。1. Whosthat?一It,sme.O

2、penthedoor,p1ease.2. Therewasaknockatthedoor.44Whoisit?”Mrs.Smithasked.3. Shehasababy,andshe1ovesit.4. Therobbertriedtorunawayfromthepo1ice,butitisimpossib1e.作引导词1、形式主语,代替由不定式,动名词或从句表示的真正主语。1）代替由不定式表示的真正主语使用Itis+adj./n.+forofsb.todosth.,翻译句子：在公共场所大声讲话是不礼貌的。Itisimportant(necessary,possib1e,impossib1e

3、,easy,hard,difficu1t.)forsb.todosth.Itisnice(crue1,kind,rude,wise,stupid,c1ever,foo1ish,po1ite.)ofsb.todosth.2）可代替动名词表示的真正主语。It,snousecryingoverspi1tmi1k.It,snogoodtakinginmuchfatandsugar.It,snofunwatchingthesamemovieforasecondtime.3）代替主语从句It,sapitythatIdidn,tthinkofitear1ier.Itisawe11-knownfactthat

4、smokingcancausecancer.Itiswe11knowntoa11thattheearthisround.注意以下各种固定句型：Itseems(ed)/appears(ed)seemedthat.It(so)happenedthat.Itturns(ed)outthat.Itoccurredtosb.that.Itissaid/reported/be1ieved/hoped/we11known/suggested.that.作形式宾语1）代替不定式作为形式宾语。主语+V.+it+宾补+todosth.常用动词：fee1,think,consider,regard,suppose,

5、find,be1ieve,count,dec1are,guess,imagine,take.forgranted等。1.Weconsideritourdutytosupportgood1eaders.2.1thinkitbesttogeta1ongwe11withpeop1earoundyou.3.Thenewmethodmakesitpossib1etocomp1etethetaskfaster.2）代替动名词或动名词短语成为句子的形式宾语。1. Idonotconsideritworthwhi1espendingtoomuchtimeonte1ephoneconversation.2. S

6、hefoundittroub1esomehavingtogothrougha11thepagesofthethickbook.3）代替从句1. Didn,tImakeitc1eartoyouthatIwasnotcoming?2. JoanhadoftenhearditsaidthatMar1eyhadnomoney.构成强调句Itis/was被强调部分（主语，宾语，状语）+that（who/whom）+句子的其余部分。使用强调句式，根据提示完成下面的句子：1. （在2003年）Igraduatedfromtheuniversity.2. （在天黑前）herea1izeditwastoo1at

7、etoreturnhome.3. （在那个村庄）weusedto1iveinthattheaccidenthappened?4. （在哪）theroadaccidenthappenedyesterday?5. Itishowyoubehaveindifficu1tiesthatshowwhatyouarerea11y1ike.It,one,that的区别one作代词1,替代由可数名词所表示的一类人或事,即泛指中的强调。1 ）Ihopethereareenoughg1assesforeachguesttohaveone.2 ）-Whocan1endmeaChinese-Eng1ishdictio

8、nary?-Ihaveone.2.替代特指的同一类人或事物的可数名词时,前面必须加上限定词（如a,the,this,that等）、物主代词或形容词加以修饰.1） Ifyoudon,t1ikethisb1uecoat,youcanbuyab1ackone.2） Idon,twantthebookontheShe1fIwantthisoneonthedesk.3） one的复数形式ones作替代词时,只可替代同一类人或事物的复数名词,前面必须有限定词。使用哦OiIe或OnCS,根据提示补全句子：1） Mr.Zhanggavethetextbookstothepupi1st（除了那些己经有了书的）2

9、） Idon,twanttobuythesesma11pears;.（我想要一些大点的）二（扔掉了一些旧3） Shewantstobuysomenewc1othesand.的)that作代词1、替代前面提到的事物,可数/不可数皆可。代替可数名词可以用theone替换.1) Thepopu1ationofChinais1argerthanthatofJapan.2) Theheadteacherinyourc1assisyoungerandmoreactivethanthatintheirs.2 .that在并列分句中,可以替代前面某一个名词或整个句子内容.可用it替换.1)Sheheardat

10、errib1enoise,andthatbroughtherheartintohermouth.3 )Theysaidtheyhaddiscussedtheprob1em,andthatwasimpossib1e.4 .that在定语从句中,可作关系代词,代替某个先行词(人或物)。1) The1adythatcametoourc1assisfromAustra1ia.2) Ac1ockisamachinethatte11speop1ethetime.4.that的复数形式为those,只可替代可数名词复数,在句中相当于theones1) Thenightsthereinsummeraresho

11、rterthanthoseinwinter.2) Thestudentswhodobestintheexamarenota1waysthosewiththebestbrains.另：注意下列句型用there,不用it!.Thereisevidencethat.显然2. Thereisnopointdoings1h.3. Thereisnosensedoingsth.4. Thereissomethingwrongwith.5. Thereisnodoubtthat.毋庸置疑6. Thereisnoneedfordoingsth./todosth.7. Thereisnodenying.无可否认

12、8. Thereisnohurryabout.无需慌张9. Thereisnodifficu1tyindoingsth.方面没困难。10. Thereisno1ackof.有很多的，不缺乏的11. Thereisnopossibi1ity/probabi1itythat/of.没可能12. Thereisnoroomfor.没有的余地13. Thereisnosensein.是无意义的14. Thereisnosignof.没有迹象15. Thereisnosayingthat.难以断言16. Thereisas1imhopeof.有微小的希望17. Thereissomedifficu1tyindoings1h.做某事有困难18. Thereissometroub1eindoingsth.做某事有麻烦19. Thereappearstobe似乎有20. Thereseemstobe.好像有21. Thereusedtobe.(过去)常常有；原来这儿有