Unit3Ahealthylife同步練習It的用法在高考中也是重現率較高的語言點，尤其是it用于強調句。其考查方式多通過“單項填空”進行，偶爾也出現在“短文改錯”和“完形填空”中。1．(NMET98)ItwasonlywhenIrereadhispoemsrecently___Ibegantoappreciatetheirbeauty．A．untilB．thatC．thenD．so正確答案：B此題考查強調句，所以用that。2．(NMET98)Ihate____whenpeopletalkwiththeirmouthsfull．A．itB．thatC．theseD．them正確答案：A此題考查it作形式賓語的用法，所以選A。3．(MET91，短文改錯)DavidandIdidnotagreeandDavidpointedtoapathwhichhethoughtitbablyleadtoavillage．正確答案：去掉it，因為定語從句中已有賓語which。一、要點點拔1．代替上文中提到過的人或事物。指代人時，一般用于小孩或身份不十分明朗的人。1)－Whoisthebaby?－It‘smyteacher’sson．2)－Whoisthatgentleman?－It'smyfriendTom．He(不可用It)wantstoseeyou．2．用于表達天氣、環(huán)境、時間、距離、季節(jié)等。例如：1)It’shalfanhour’swalkfromheretoourschool．2)It‘sniceandwarmhere．3)Butit'stwoo'clocknow,andit'stimeforustogotoschool．3．用作形式主語.it沒有具體意義，而只是幫助把真正的主語移至句子后尾，使句子顯得平穩(wěn)一些，能借it給移至句子后尾的主語有三種：一種由不定式表示，一種由動名詞表示，一種由從句表示。

1).It替代真正的主語——動詞不定式短語.

Itiseasiertosaythantodo.

Itisagoodacttohelptheothers.2).it替代真正的主語——動名詞短語,以動名詞短語做主語的句子，主要在以nogood,nouse,noharm,dangerous,foolish等詞作表語的句中.It’snoharmdrinkingrunningwaterinthatarea。It’sfoolishtalkinglikethat.3).it替代從句作主語，用從句做主語的帶it的句子很多,常見的有下面幾類：

①Itisapity(ashame,afact,awonder,agoodthing,etc.)that…

Itisashamethathedidn’tpasstheexam.

②Itisstrange(surprising,obvious

,true,good,possible,clear,etc.

)that…。

Itwasclearthattheyhadnodesireforpeace.

③Itseems(happened,turnedout,etc.)that…

Itseemedthatthingswerenotastheyexpected.④Itissaid

(decided,expected,etc)that…

Itissaidthattheticketshavebeensoldout.4.用作形式賓語。當復合賓語中的賓語是不定式,－ing短語或從句往往用it作形式賓語,而將真正的賓語移至句末,句子重心后移。1)WefinditdifficulttolearnEnglishwellinsuchashorttime．2)Wethinkitnousecryingoverspiltmilk．3)Wemadeitclearwhenandwhereweweregoingtohavethemeeting．5．用于強調句型，即“Itis/was＋被強調部分＋that/who/whom+其它”句型之中。使用該句型有以下幾點請注意：①強調句的謂語is或was永遠用單數.ItwasyesterdaythatImetyourfatherinthestreet．②不管被強調部分是哪種狀語，只能用that連接，不得使用where、when等連詞.ItwasinthestreetthatImetyourfatheryesterday．③被強調部分為人時，可用who(主格或賓格)和whom(賓格)代替that，用that也行。Itwasyourfatherthat/whom/whoImetinthestreetyesterday．2)ItwasIthat/whometyourfatherinthestreetyesterday．④強調句中也要注意主謂一致、人稱一致和否定轉移的問題。Itistheywhoareourfriends．2)Itwasnotuntilteno'clockthatwegothomelastnight．⑤注意不要混淆強調句和其他從句。Itiswas…that…為強調句標志，去掉后仍可組成一個完整的句子，只是沒被強調,而其他從句一般不具備這一特征。比較：1)Itwasteno'clockwhenwegothomelastnight．我們昨晚到家時已十點了。2)Itwasatteno'clockthatwegothomelastnight．我們昨晚是在十點到家的。第一句不是強調句，when不可改為that,因為去掉itwas和that后，只能組成“Wegothometeno'clocklastnight．”這樣一個不完整的句子；第二句是強調句，that不可改為when．二、常用句型及考點I.形式主語型1.Itisclear(obvious，true，possible，certain…)that…2.Itisimportant(necessary，right，strange，natural…)that…掌握本句型，應該記住所列舉的形容詞，并且記住that后的從句應用虛擬語氣(should+動詞原形)，should可以省去。3.Itisnogood(use)doingsth．4.Itisapity(ashame…)that…本句型中，that后的從句一般用虛擬語氣(should十動詞原形)，should可以省去。表示出乎意料，常譯為“竟然”。沒有這種意義時，則不用虛擬語氣。5.Itistime(abouttime，hightime)that…本句型中that后的從句應該用虛擬語氣。6.Itisthefirst(second…)timethat…7.Itissaid(reported，learned…．)that…8.Itissuggested(ordered…)that…本句型中的過去分詞應該是表示請求、建議、命令等的詞，that后的從句要用虛擬語氣(should十動詞原形)，should可以省略。常譯為“據建議；有命令……”。9.Ithappens(seems，appears)that…10.Ittakessb…todosth．11.Itdoesn’tmatterwhether…12.Itiskind(ofsb)todosth．本句型中的不定式如果需要邏輯主語，則須要前置介詞of，而句型中的形容詞必須是能表示邏輯主語特征的形容詞，常見的有bad，brave，careless，clever，cruel，foolish，honest，horrible，kind，lazy，modest，naughty,polite，rude，silly,stupid，wise，wrong等。13.Itisnecessary(forsb)todosth．14.Itis(just)likesbtodosth．本句型為“某人(恰恰)是……樣子”。用來表示贊揚或不滿，若用否定式，則表示懷疑。例：It'slikehimtoleavetheworktoothers．他就是這樣的一個人，把工作推給別人。15.Itisuptosbtodosth．本句型表示“誼由某人做……”。II．強調句型Itis+被強調部分+that/who…本句型中被強調部分可以是主語、賓語或狀語。強調的主語如果是人，that可以由who換用。III．其他句型1.Itis…since…本句型主句中用時間作表語，一般用現在時或完成時，since引導的從句常用瞬間動詞的一般過去時態(tài)。主句如用一般過去時，則從句用過去完成時。2.Itis…when…本句型中的when引導的是一個時間狀語從句，主句中的it指時間，表語由具體的時間充當。3.Itlooks(seems)asif．．．本句型中的asif引導一個狀語從句，常譯為“看起來好像……”。如果與事實不相符合，則用虛擬語氣．例1Itlooksasifheisill(真的病了).例2Itlooksasifhewereill(沒有生病).一．單項選擇wasatthegate____hetoldmethenews.A.thatB.whatC.whichD.when____necessarytotellhisfathereverythingA.itB.thatC.whatD.heitinthispalace____thelastemperordied?A.thatB.inwhichC.inwhereD.which____possibletoflytothemooninaspaceship?A.nowB.manC.thatD.ititduringtheSecondWorldWar____hedied?A.thatB.whileC.inwhichD.then____necessarytocompletethedesignbeforeNationalDay?A.thisB.thatC.itD.hedon'tthink____possibletomasteraforeignlanguagewithoutmuchmemorywork.A.thisB.thatC.itsD.it ____matterifhecan'tfinishthejobontime?A.thisB.thatC.heD.itwasnot____shetookoffherdarkglasses____,Irealizedshewasafamousfilmstar.A.when;thatB.until;thatC.until;whenD.when;then‘smotherkepttellinghimthatheshouldworkharder,but____didn’thelp.A.heB.whichC.sheD.itafactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It12.Is________possibletoflytothemooninaspaceship?A．nowB．manC．thatD．it13．Ourfoodandservicearebetterthan________usedtobe.A．itB．weC．theyD．them14．________appearstome________thereportmustbetruth.A．That;itB．It;thatC．It;itD．That;that15．Hefeels________dutytohelpothers.A．thatheB．thathisC．itheD．ithis16．Take________easy.Theroadsareicy.A．itB．themC．usD．you17．TheTVsetsmadeinChinaaremuchbetterthan________inJapan.A．thatB．thoseC．themD．It18．——Haveyoufoundthebikeyoulostyesterday?——Yes,I'vefound________already.A．itB．thatC．theoneD．thatone19.——I'mlookingforaflat.——Wouldyoulike____with____garden?A．it;theB．it;aC．one;aD．one;the20．________was________whoImetinthemuseumthismorning.A．It;himB．It;heC．That;heD.That;him21．Itwasinthericefields________wehadourLeaguemeeting.A．whereB．thatC．inwhichD．onwhich22．________youcometothepartysolate?A．WhyisitB．WhyitisC．WhyitisthatD．Whyisitthat23．——Wereallthreepeopleinthecarinjuredintheaccident——No,___onlythetwopassengers___gothurt．A．theywere;thatB．therewas;thatC．itwas;whoD．thereare;who24．Idon'tthink________possibletomasteraforeignlanguagewithoutmuchmemorywork.A．thisB．thatC．itsD．it25．Itwasnot________shetookoffherglasses________Irealizedshewasafamousfilmstar．A.when;thatB.until;thatC.until;whenD.when;thenwasnotuntil1920____regularradiobroadcastsbegan.A．whileB．whichC．thatD．since27．________isafactthatEnglishisbeingacceptedasaninternationallanguage.A．ThereB．ThisC．ThatD．It28．Itwasabout600yearsago________thefirstclockwithafaceandanhourhandwasmade.A．thatB．untilC．beforeD．when29．ItwasonlywhenIrereadhispoemsrecently____Ibegantoappreciatetheirbeauty.A．untilB．thatC．thenD．So30．Ihate______whenpeopletalkwiththeirmouthsfull.A．itB．thatC．theseD．them31．——Whydon'twetakealittlebreak?——Didn'twejusthave________?A．itB．thatC．oneD．thisitduringtheSecondWorldWar____hedied？(MET88)A．thatB．WhileC．inwhichD．Then____possibletoflytothemooninaspaceship？(MET88)A．nowB．thatC．itD．Mandon'tthink___possibletomasteraforeignlanguagewithoutmuchmomorywork．(MET90)A．ThisB．thatC．itsD．ItisafactthatEnglishisbeingacceptedasaninternationallanguage．(NMET95)A．ThereB．ThisC．ThatD．Itwasabout600yearsago___thefirstclockwithfaceandanhourhandwasmade．(NMET97)A．thatB．untilC．beforeD．whenplaysuchanimportantpartinourdailylife?A．WhyitisthatB．WhyisitthatC．WhywasitthatD．Whyisit38.WasitduringtheSecondWorldWar_____hedied?A.thatB.whileC.inwhich39.Is____necessarytotakeoffourshoeswhenweenterthelab?A.everyone40.Is____possibletoflytothemooninaspaceship?41.Idon’tthink___possibletomasteraforeignlanguagewithoutmuchmemorywork.42.Sheheardofaterriblenoise,___broughtherheartintohermouth.43.Alicereceivedaninvitationfromherboss,____cameasasurprise.44.Does____matterifhecan’tfinishthejobontime?’smotherkepttellinghimthatheshouldworkharder,but____didn’thelp.weatherturnedouttobeverygood,___wasmorethanwecouldexpect.afactthatEnglishisbeingacceptedasaninternationallanguage.hopethereareenoughglassesforeachguesttohave_____.wasabout600yearsago___thefirstclockwithafaceandanhourhandwasmade.hate____whenpeopletalkwiththeirmouthsfull.wasonlywhenIrereadhispoemsrecently____Ibegantoappreciatetheirbeauty.istheabilitytodothejob____mattersnotwhereyoucomefromorwhatyouare.____youthat____toblame.;is;are;are;isIsawlastnightattheconcert?youyouyouelectricityplayssuchanimportantpartinourlife?isitthatisititisthatisthatwas____hesaid_____disappointedme.;what;that ;that;whatwasinthelab___wastakenchargeofbyProfessorHarris___theydidtheexperiment.;that;what;that;wherepeoplenowmakearuletobuycardsfortheirfriendsbeforeChristmas.isatthedoor,whois?60.—Itisrainingcatsanddogs.—.itisisititisisit二.分析it成分，辨清相似句型。1.①_____iswellknow