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高考中的it及其它重要用法十二、It+be+adj.of/forsbtodosth句型中it为形式主语，真正的主语是后置的不定式。此句型重点是考查何时用of何时用for。如果句型中的形容词是用来描述sb的特征的（如kind/rude/cruel/polite/right/wrong/foolish/silly/stupid/wise等），则用of，此时句式可以换成sb+be+adj.+todosth；若句型中形容词是用来描述不定式性质的（如important/necessary/hard/difficult/easy/natural/common等），则用for。例如1,It’sverykindofyoutosayso=Youareverykindtosayso.2,It’simportantforonetolearnaforeignlanguage.十三、It’snouse/gooddoingsth此句型表示：做……是无用的/不好的。句型中it为形式主语。真正的主语是后置的doing。例如1,It’snousebuyingbookswithoutreadingthem.2,It’snogoodtryingtoopenthebox.八、It+be+adj./n./done+that…在此结构中，it为形式主语，不可以用其它词代替，真正的主语是后置的从句。值得注意的是：在此结构中，若表示某种语气（如惊奇、遗憾、理应如此等），从句应用should+动词原形，should可以省略；若done为required/suggested/demanded/recommend等时，从句必须用should+动词原形，should可以省略。高考真题1,(2004,北京)TheForeignMinistersaid,“__ourhopethatthetwosideswillworktowardspeace.A,ThisisB,ThereisC,ThatisD,Itis2,(2005,上海)__intheregulationsthatyoushouldnottellotherpeoplethepasswordofyoure-mailaccount.A,WhatisrequiredB,WhatrequiresC,ItisrequiredD,Itrequires3,Itwasobviousthatthemanwasnotonthespotatthetimethemurdertookplace.4,Itisnecessarythatadoctor(should)besentforatonce.5,IthasbeenprovedthatthecopperknivescamefromSpain.九、It’suptosbtodosth此句型意为：由某人决定做某事。在此句型中，口语中常用It’s(all)uptoyou或uptoyou表示“由你决定”。高考真题1,(2005,安徽)-Shallwegototheartexhibitionrightaway?-__.A,It’syouropinionB,Idon’tmindC,It’alluptoyouD,That’syourdecision2,It’suptoyoutochoosewhereweshouldgo六、sbthink/find/consider/makeit+adj./n.+todo/that….在此结构中，it为形式宾语，不可以用this或that替换。高考真题1,(2005,全国Ⅰ,Ⅱ)Thechairmanthought__necessarytoinviteProfessorSmithtospeakatthemeeting.A,thatB,itC,thisD,him2,ImakeitaruletogoshoppingonSundaymornings.3,Theywanttomakeitclearthattheydoanimportantandnecessaryjob.七、sblike/love/enjoy/hate/appreciateit+when/if…在这一结构中，应注意like/love/enjoy/hate/appreciate后不直接跟宾语从句，常用it代替后面句子所表示的意义高考真题1,(2004,全国Ⅰ)Ilike__intheautumnwhentheweatherisclearandbright.A,thisB,thatC,itD,one2,(2003,上海)Iwouldappreciateit__youcallbackthisafternoonforthedoctor’sappointment.A,untilB,ifC,whenD,that三、Itbe+时间+before…此句型表示：过了一段时,才……否定表示：没多久,就……高考真题1,(2005,山东)Itwassometime__werealizedthetruth.A,whenB,untilC,sinceD,before2,(2004,福建)Scientistssayitmaybefiveorsixyears__itispossibletotestthemedicineonhumanpatients.A,sinceB,afterC,beforeD,When3,Itwasnotlongbeforeheleft.没多久他就离开了。四、Itbe+时间+since…在此句型中若从句中谓语动词为短暂性动词，则句型意为：自从（短暂性动词表示的动作开始）以来，已经……时间了；若从句中谓语动词为延续性动词，则句意为：自从（延续性动词表示的动作结束）以来，已经……时间了。高考真题1,(2005,安徽)Thatwasreallyasplendidevening.It’syears__Ienjoyedmyselfsomuch.A,whenB,thatC,beforeD,since2,ItisfiveyearssinceIleftmyhometown.我离开家乡已经五年了。五、Itbe+时间+when…此句型表示：当……的时候,是……时间。高考真题(2002,北京)-Hewasnearlydrownedonce.-Whenwas_?-__wasin1998whenhewasinMiddleSchool.A,that,ItB,this,ThisC,this,ItD,that,This十、It做代词代替整个句子高考真题(2005,全国Ⅲ)ThedoctoradvisedVesastronglythatsheshouldtakeaholiday,but__didn’thelp.A,itB,sheC,whichD,he十一、在一些固定用法中考查高考真题1,(2004,全国Ⅰ)–I’dliketotakeaweek’sholiday.-__,we’retoobusy.A,Don’tworryB,Don’tmentionitC,ForgetitD,Pardonme2,(2004,江苏)–Howlongareyoustaying?-Idon’tknow.__.A,That’sOKB,NevermindC,ItdependsD,Itdoesn’tmatter其它重要用法除了以上高考已经涉及的这些考点以外，以下的一些句型结构我们也应予以高度重视。十四、Ithappens/appears/seemsthat…此句型意为：碰巧……好象……似乎……例如1,IthappenedthatIwaswatchingTVwhenhecametoseeme.2,Itappearedthatthelittlegirlwouldprobablyneverwalk.3,Itseemsthatheisalwaystrue.十五、Itlooks/seemsasif…此句型意为：看上去似乎……在此句型中如果表示与事实情况相反，则要用虚拟语气；如果表示事实情况，则用陈述语气。例如1,Whenapencilispartlyinaglassofwater,itlooksasifitwerebroken.2,It’ssocloudy;itseemsasifitisgoingtorain.十六、It’s(high)timethat…此句型表示：该是……的时候了。That可以省去。使用该句型时，That从句中的谓语动词用一般过去时或者用should+动词原形，但是should不可省略。例如1,It’stimethekidswenttobed.2,It’shightimethatIshouldgotopickupmyson.十七、It+be+时间+till/until…此句型表示：到某事发生还剩下……时间了。例如1,Itwillbeaweekuntilmybirthdaycomes.2,Itwasonlytenminutesuntilmyfathercamebackfromwork.十八、It+bethefirst/second…timethat…此句型表示：是某人第几次做……当主句be用is时，从句谓语动词用现在完成时；当主句be用was时，从句谓语动词用过去完成时。it也可以用this或that。例如1,It(This)isthesecondtimethathehascometovisitthecity.2,It(That)wasthefirsttimethatIhadvisitedtheGreatWall.一、Itbe+被强调部分+that/who…该句型为强调句型。被强调部分是除谓语动词以外的任何句子成分。只有强调部分为人时，才可以用who。在解题时如何判断是否为it强调句型呢？只需去掉Itbe…that/who…这个强调结构，若句子结构仍是完整的，就是强调句型。高考真题1,(2004,上海)Why!Ihavenothingtoconfess.__youwantmetosay?A,WhatisitthatB,WhatitisthatC,HowisitthatD,Howitisthat2,(2004,福建)Itwaswithgreatjoy__hereceivedthenewsthathislostdaughterhadbeenfound.A,becauseB,whichC,sinceD,that二、Itbe+notuntil+被强调部分+that…这是notuntil的强调形式。需要注意的是：在此句型中主句不再用部分倒装。高考真题1，(2005,全国Ⅰ,Ⅱ)Itwasn’tuntilnearlyamonthlater__Ireceivedthemanager’sreply.A,sinceB,whenC,asD,that2,(2004,湖北)Itwas__backhomeaftertheexperiment.A,notuntilmidnightB,untilmidnightthathedidn’tgoC,notuntilmidnightthathewentD,untilmidnightwhenhedidn’tgoThanksforYourListening!