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高考英语专题总复习it用法及强调句型一、it作指示代词【完成句子】用one，ones，it，that，those,theone填空(1)—Ican'tfindmywatch.—Youhaven'tfound___？Ifyouwanttobuyanew____，Isuggestyoubuy____madeinChina.(2)We'vegotabigcupandtwosmall______.(3)Theweightofanelephantismuchgreaterthan______ofatiger.(4)Thebooksonthefirstshelfareeasierthan______onthesecondshelf.(5)Theboytoldhisstoryand______ofthegirlupstairs.itoneoneonesthatthosetheone【结论1】①指代上文提过的事物时，it指的是同类同物，②one指的是同类异物，复数形式用ones；③that后面常有后置定语，有特指意义，代替不可数名词或单数可数名词④复数名词用those，相当于theones。【例句观察】—Someoneisknockingatthedoor.Whoisit?—ItmustbeLeo.Hesaidhe'dcometoseeme.【结论2】it指代人时，常指小孩或身份不明的人。【例句观察】It'stooquietintheroom.Everyonejustkeepssilent.【结论3】it可用以指代环境或情况。【完成例句】根据语境补全句子(6)—Whattimeisitnow?—halfpastseven.(7)—springnowandit'swarmthesedays.【结论4】it可用以指代时间、季节、天气或距离。It’sIt’s【注意】it指代时间时，有如下一些句型：(1)Itistimeforsth.(forsb.)todosth.that－从句(shoulddo/did）例：①It'stimeforlunch.②It'stimeforustocleanthehouse.③It'stimethatweshouldcleanthehouse.＝It'stimethatwecleanedthehouse.(2)Itis/hasbeen＋sometime＋since－从句(一般过去时)(3)It/Thisisthefirst/second…timethat－从句(现在完成时)It/Thatwasthefirst/second…timethat－从句(过去完成时)这是某人第……次做了某事例：①ItisthesecondtimethatshehasvisitedtheGreatWall.②ThatwasthefirsttimethatIhadcomelatetoschool.(4)Itwas＋时间点＋when－从句例：Itwaseveningwhenwegothome.(5)Itwas/willbe＋sometime＋before－从句例：①过了5年他们才从北大毕业。ItwasfiveyearsbeforetheyfinallygraduatedfromBeijingUniversity.②不久，我们就要从我们学校毕业了。Itwon'tbelongbeforewegraduatefromourschool.二、it作形式主语【完成例句】根据语境补全句子(8)ispossibleformetomakeatouraroundtheworld.【结论】代替由不定式、动名词或从句所表示的真正主语。为平衡句子，通常把不定式作主语改为it作形式主语。It三、it作形式宾语【例句观察】①Howdiditcomeaboutthatsomanypeoplewereattacked?②Shefeelsithardtogetintouchwithheroldfriend.③Mobilephonesmakeitpossibleforustokeepintouchanywhere.④Ihavemadeitaruletogetupearly.【结论1】①it可以用在某些固定句型中，例如：Howdiditcomeaboutthat－从句意为“……怎么发生的？”②it作形式宾语常用结构有：代替由不定式、动名词或从句所表示的真正宾语。常见结构有：主语＋think/consider/find/feel/make/believe/regard＋it＋adj./n.(forsb.)todo.【例句观察】IconsideritnogoodchattingwithstrangersthroughtheInternet.【结论2】主语＋think/consider/find/feel＋it＋nogood/usedoingsth.【例句观察】Ihateitwhenpeoplespeakwiththeirmouthsfull.【结论3】主语＋hate/dislike/love/like＋it＋when－从句，表示对某一情况的喜好或厌恶。【例句观察】Ireallyappreciateitifyoucouldhelpmewithmymath.【结论4】主语＋appreciate＋it＋if－从句【例句观察】①Youmustseetoitthatthedoorsarelockedbeforeyouleavethelab.②Youcandependuponitthatwewon'tgiveup.③Ianswerforitthatsheisanhonestgirl.【结论5】主语＋seeto/answerforit＋that－从句(确保……)主语＋dependonit＋that－从句(指望，确信……)四、带it的一些固定词组1．(You've/I've)gotit.2.Forgetit.3.takeiteasy4.makeit5.makeit＋时间6.It/That(all)depends.。7.Itcan'tbehelped.8.Itishardtosay.9.That'sit.10.Don'tmentionit.11.Believeitornot.12.Itdoesn'tmatter.13.Whenitcomesto…14.Keepitup.强调句型强调句结构：Itis/was＋被强调部分＋that＋句子的其余部分。验证强调句的方法：去掉Itis/was…that结构后，可以把被强调的部分与句子其余部分还原为一个完整的句子。【例句观察】(1)ItwasEdisonwhoinventedthelamp.(2)ItisEdisonwhoinventsthelamp.【结论1】注意时态的一致性。【例句观察】ItisIthatamyourEnglishteacher.【结论2】当被强调的部分是主语时，注意保持主谓一致。【例句观察】Hedidn'tgotobeduntilhefinishedhishomework.(对画线部分进行强调)→Itwasn'tuntilhefinishedhishomeworkthathewenttobed.【结论3】not…until…结构用于强调句中，即：Itwasn'tuntil…that＋句子的其余部分。【例句观察】Wasitnotuntilhefinishedhishomeworkthathewenttobed?【结论4】强调句的一般疑问句形式：Is/Wasit＋被强调部分＋that＋句子的其余部分。【完成句子】他究竟什么时候上床睡觉？Whenwasitthathewenttobed?【结论5】强调句的特殊疑问句形式：特殊疑问词＋is/wasit＋that＋句子的其余部分。【例句观察】Ireallydon'tknowwhenitwasthathewenttobed.【结论6】含有强调句型的特殊疑问句作宾语从句时，注意用陈述语序。【疑难】Itisinthecitywherehewasbornthatheworks.他工作的地方是他出生的那个城市。【疑难剖析】强调句中的被强调部分含有一个定语从句，要注意区别、分析。Itis/was＋被强调部分＋定语从句＋that(who)＋句子的其余部分1.Wefeelourdutytomakeourcountryabetterplace。A．itB．thisC．thatD．one2.Hedidn’tmake___clearwhenandwherethemeetingwouldbehold.A．thisB．itC．thatD．these3.Was__inthehotel___youlostyourbag?A．one,thatB．that,oneC．that,itD．it,that