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It的用法及强调句型性质功能例句代词用作人称代词，代替上文提到的人或事物。—Whoisit?—It’sme.You'vehelpedmealot;I'llneverforgetit.性质功能例句代词用以代替指示代词this或that。—What’sthis?—It’sacomputer．—Whosebookisthat?—It'shers．性质功能例句代词表示时间、天气、距离、价钱等。It’stimeforlunch．It’sraininghard．It’stwomilesfromtheschooltoourhome．引导词作形式主语,代替由不定式、动名词或从句等表示的真正主语。Itiseasytobuyanewradio.Itisnousetellinghimthat.Itdoesn'tmatterwhethershecomesornot.引导词作形式宾语,代替由不定式、动名词或从句等表示的真正宾语。Ifeelitmydutytohelphim.Wethoughtitnousedoingthat.I’vemadeitclearthatnobodyisallowedtosmokehere.引导词表示强调,其结构是:Itis/was+强调部分+that+原句剩余部分。此结构只限于强调状语、主语和宾语。注意：①如果强调的是人,其后用that或who均可;②如果强调的是物、时间或地点等状语,其后只能用that不用where、when、why。引导词IsawTomyesterdayhere.①ItwasIthat/whosawTomyesterdayhere．②ItwasTomthat/whoIsawyesterdayhere．③ItwasyesterdaythatIsawTomhere．④ItwasherethatIsawTomyesterday．引导词注意:若原句是not…until句型,在强调until部分时,要把否定形式放入被强调部分。例如:Hedidn’tleaveuntillreturned.=ItwasnotuntilIreturnedthatheleft．易与强调句型*若强调谓语,则用do/does/did+动词原形,常译为“的确”“一定”等,该结构只能用于陈述句或祈使句中。引导的强调句与其它从句的区别在于：Dobepatient!(一定要耐心点)HedoeswanttolearnEnglishwell.(他的确想学好英语。)ItwasintheplacethatIwasborn.(强调句)ItwastheplacewhereIwasborn.(定语从句)混淆的其它从句①强调句型中前后时态应一致;②被强调的部分为主语、宾语和状语,若把itis／was和that／who去掉,剩下的词语能重新组成正确的句子,而且不缺成分,否则就是其它从句。Itwasin1945thatWorldwarIIended.(强调句)Itwas1945whenworldwarIIended.(定语从句)③ItwasalongtimesinceImetyoulast.(时间状语)Itistimethatyouwenttobed.(定语从句)口诀：代词it本意它,既可指这又指那;时间天气均可指,谈到距离也用它;假主假宾均可做,强调句型跟that。1.Itwasthisvillage___Iwasbought.A.whereB.thatC.onwhichD.which2.Itwasinthisvillage___Iwasboughtup.A.whereB.thatC.onwhichD.which3.Canitbeinthedrawer___youputyourpassport?A.whereB.inwhichC.thereD.that4.ItwasJuly1,1997___sawthereturnofHongKongtothemotherland.A.thatB.whenC.whichD.inwhich5.Itistwoyears__Ijoinedthearmy.A.beforeB.sinceC.thatD.after6.Itwastwoyears___Ijoinedthearmy.A.beforeB.sinceC.thatD.after7.---Wasitunderthetree___youwereawaytalkingtoafriend?---Sure.ButwhenIgotbackthere,thebikewasgone.A.thatB.whereC.whichD.while8.---Whydon’twetakealittlebreak?---Didn’twejusthave____?A.itB.thatC.oneD.this9.Itwasnotuntil1920____regularradiobroadcastbegan.A.whileB.whichC.thatD.since10.___isthefactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It11.Itwasabout600yearsago___firstclockwithafaceandanhourhandwasmade.A.thatB.untilC.beforeD.when12.Ihate____whenpeopletalkwiththeirmouthsfull.A.itB.thatC.theseD.them13.ItwasonlywhenIrereadhispoemsrecently____Ibegantoappreciatetheirbeauty.A.untilB.thatC.thenD.so14.Itistheabilitytodothejob____mattersnotwhereyoucomefromorwhatyouare.A.oneB.thatC.whatD.it15.TheParkersboughtafewhousebut__willneedalotofworkbeforetheycanmovein.A.theyB.itC.oneD.which16.____noneedforustodiscusstheproblemagainsinceithasalreadybeensettled.A.IthasB.TherehasC.ItisD.Thereis17.Wasitin1969__theAmericanastronautsucceeded___landingonthemoon.A.when;onB.that;onC.when;inD.that;in18.Was___thatIsawlastnightattheconcert?A.ityouB.notyouC.youD.thatyourself19.____wasin1979___Igraduatedfromtheuniversity.A.That;thatB.It;thatC.That;whenD.It;when20.Whatapitymynewcomputerdoesn’twork!____mustbesomethingwrongwithit.A.ItB.ThereC.ThisD.That21.Ilike____intheautumnwhentheweatherisclearandbright.A.thisB.thatC.itD.one22.Someoneisknockingatthedoor,butwhocan___be?A.oneB.heC.sheD.it23.Aknockonthedoormadehimlookup.But___wasonlythemanager.A.thisB.thatC.sheD.it24.Someoneisringingthedoorbell.Goandsee____.A.whoisheB.whoheisC.whoisitD.whoitis25.Is___necessarytocompletethedesignbeforeNationalDay?A.thisB.thatC.itD.he26.Does___matterifhecan’tfinishthejobontime?A.thisB.thatC.heD.it27.Itworriedherabit___herhairwasturninggrey.A.whileB.thatC.ifD.for28.Theyhavemade__arule__intheroom.A.this;nottosmokeB.it;smokingC.it;tonotsmokeD.it;nottosmoke