it用法總結(jié)(高三總復(fù)習(xí))課件

It的用法it用法總結(jié)(高三總復(fù)習(xí))一、it作人稱代詞的用法1.

指事物作為人稱代詞，it可以除人以外的一切事物或動(dòng)物。如：Idroppedmywatchanditbroke.我把手表掉在地上摔壞了。It’shardwork,butIenjoyit.工作很辛苦，可是我樂(lè)意干?！癢hereisthedog?”

“It’sinthebedroom.

”

“狗在哪?”“在臥室里”。it用法總結(jié)(高三總復(fù)習(xí))2.

指人it指人主要用于指不性別不明的嬰兒或用于確認(rèn)某人的身份。如：Isitaboyoragirl?是男孩還是女孩?Thereisaknockonthedoor.Itmustbethepostman.有人在敲門，一定是郵遞員?！菊f(shuō)明】在答語(yǔ)中，常用來(lái)指本人，如說(shuō)

It’sme。it用法總結(jié)(高三總復(fù)習(xí))3.

代替某些代詞代詞

it

還可用于代替指示代詞this,that

以及復(fù)合不定代詞

something,anything,nothing等。如：“What’sthis?”

“It’sanewmachine.

”

“這是什么?”“是一種新機(jī)器”。Nothingiswrong,isit?沒(méi)出什么問(wèn)題，是嗎?it用法總結(jié)(高三總復(fù)習(xí))二、it作非人稱代詞的用法1.

基本用法it

作非人稱代詞的用法，主要用于指時(shí)間、距離、價(jià)值、天氣、氣候及溫度等自然現(xiàn)象。

1.ItisFridaytoday.2.It

wasverycoldlastMonday.3.Itisabout8:30now.4.Itisabout25kmfromLinquantoFuyang.5.ItliesinthesouthofAnhui.6.Itis40°C!Yougotahighfever!dateweathertimedistanceplacetemperature

it用法總結(jié)(高三總復(fù)習(xí))2.

用于某些句型It’stimeforsth.該做某事了。It’stimetodosth.該做某事的時(shí)候了。It’stimeforsbtodosth.某人該干某事了。It’s(about/high)time+that-從句.某人該做某事了。(從句謂語(yǔ)用過(guò)去式，有時(shí)也用“should+動(dòng)詞原形”)It’sfirst(second)time+that-從句.某人第幾次干某事。(從句謂語(yǔ)用現(xiàn)在完成時(shí))It’s+時(shí)間段+since.自從……有一段時(shí)間了。It’s+時(shí)間段+before.過(guò)多長(zhǎng)的時(shí)間才…it’s=itwasIt‘s+時(shí)間段+that.…多久了It's+時(shí)間段+when...是在某個(gè)時(shí)刻Itistimeforbreakfast.Itistimetohavebreakfast.Itistimeforustohavebreakfast.ItisthefirsttimeI’vebeenhere.ItistwoweekssinceIsawhimIt'stenyearsbeforeIgraduated.It'stenyearsthatI'velivedhereforItwastenyearsagowhenIgraduatedit用法總結(jié)(高三總復(fù)習(xí))三、it用作形式主語(yǔ)1.

基本用法當(dāng)不定式、動(dòng)名詞、從句等復(fù)雜成分用作句子主語(yǔ)時(shí)，為保持句子平衡，通常把真正的主語(yǔ)放在句末，而在句首使用形式主語(yǔ)it。如：It’sveryimportanttorememberthis.記住這一點(diǎn)很重要。It’shardworkclimbingmountains.爬山是費(fèi)勁的事。It’sunknownwhenhewillcome.他什么時(shí)候來(lái)還不知道。it用法總結(jié)(高三總復(fù)習(xí))2.

用作形式主語(yǔ)的的重要句型(1)

it作形式主語(yǔ)替代不定式

構(gòu)成”It+be+adj.for(of)sbtodosth“

某人做某事……Itishardforhimtomakeuphismind.他很難下定決心。Itwasfoolishofhertosaysuchathing.她說(shuō)那樣的話，真是太蠢了。【Tip】介詞

of與for的區(qū)別是：of用于指某人的性格、屬性、特征等，介詞for表示對(duì)象，意為“對(duì)……來(lái)說(shuō)”it用法總結(jié)(高三總復(fù)習(xí))2)ItisV-ed+that①Itissaid(reported,learned)+that…ItissaidthathehascometoBeijing.②Itissuggested(ordered,demanded,insisted,commanded)+that…從句中的過(guò)去分詞是表示請(qǐng)求，建議，命令等詞時(shí)，that后的從句要用虛擬語(yǔ)氣(should+V原形).Should可以省略。譯為“據(jù)建議；有命令…”Itissuggestedthatthemeeting(should)beputoff.it用法總結(jié)(高三總復(fù)習(xí))3)Itisapity(ashame)that…That后的從句一般用虛擬語(yǔ)氣(should+V原形),should可以省略.表示出乎意料，譯為”竟然“。沒(méi)有這種意義時(shí)，則不用虛擬語(yǔ)氣。Itisapitythatsuchathing(should)happeninyourclass.it用法總結(jié)(高三總復(fù)習(xí))(4)

Ittakessb.+時(shí)間段+todosth.某人做某事花了……時(shí)間Ittakesyearstomasteranewlanguage.要花多年的時(shí)間才能掌握一門新的語(yǔ)言。【Tip】此句型可以有以下多變種變體：

Ittookmeanhourtowritetheletter.=Thelettertookmeanhour(towrite).=Itookanhourtowritetheletter.it用法總結(jié)(高三總復(fù)習(xí))(5)

Itisuptosbtodosth.該由某人做某事It’suptoyoutotomakethechoice.得由你來(lái)作選擇。(6)

itlook(seem,appear,happen,occur)that[asif]…

似乎……Itseemedasthoughhedidn’trecognizeme.他似乎沒(méi)認(rèn)出我來(lái)。IthappenedthatIwasoutwhenhecalled.他打電話時(shí)我碰巧不在家。(7)

Ifitwerenotfor…

/Ifithadn’tbeenfor…

若不是因?yàn)椤璉fitwerenotfortheirhelp,wecouldn’thavegotoverthedifficulties.要不是他們幫助，這些困難我們不克服不了的。it用法總結(jié)(高三總復(fù)習(xí))四、it用作形式賓語(yǔ)1.

基本用法當(dāng)不定式、動(dòng)名詞、從句等復(fù)雜成分用作賓語(yǔ)且其后跟有賓語(yǔ)補(bǔ)足語(yǔ)時(shí)，通常會(huì)在賓語(yǔ)補(bǔ)足語(yǔ)前使用形式賓語(yǔ)，而將真正的賓語(yǔ)移至句末。其基本結(jié)構(gòu)為“動(dòng)詞+it+賓語(yǔ)補(bǔ)足語(yǔ)+不定式(動(dòng)名詞或從句)”。如：Ifinditdifficulttodothejobwell.我發(fā)現(xiàn)做好這件事不容易。Ithinkitbestthatyoushouldstayhere.我認(rèn)為你最好住這兒。Wethinkitnousecomplaining.我們認(rèn)為抱怨是沒(méi)有用的。it用法總結(jié)(高三總復(fù)習(xí))2.用作形式賓語(yǔ)的幾個(gè)特殊結(jié)構(gòu)(1)

動(dòng)詞+it+that-從句。如：Ilikeitthatyoucame.你來(lái)了，我很高興。Itakeit(that)hewillcomeontime.我認(rèn)為他會(huì)準(zhǔn)時(shí)來(lái)的。Youcanputitthatitwasarrangedbefore.你可以說(shuō)這是以前安排的。Rumorhasitthatthedefenceministerwillsoonresign.據(jù)傳聞，國(guó)防部長(zhǎng)不久就要辭職?！菊f(shuō)明】能用于此結(jié)構(gòu)的動(dòng)詞不多，常見(jiàn)的有

have,take,put,like等。it用法總結(jié)(高三總復(fù)習(xí))(2)

動(dòng)詞+it+when(if)-從句。如：Idislikeitwhenyouwhistle.我不愛(ài)聽(tīng)你吹口哨。Wereallyappreciateitwhensheofferedtohelp.她來(lái)幫忙了，我們十分感激。I’dpreferitifIdidn’thavetodosomuchwork.要是我不必做那么多工作，好就太好了。【說(shuō)明】能用于此結(jié)構(gòu)的動(dòng)詞不多，常見(jiàn)的有

enjoy,hate,love,like,dislike,appreciate,prefer等。it用法總結(jié)(高三總復(fù)習(xí))(3)

動(dòng)詞+prep+it+that-從句。如：Seetoitthatyou’renotlateagain.注意千萬(wàn)不要再遲到。Looktoitthatthisdoesn’thappenagain.注意不要再發(fā)生這種事。Youmayrelyonitthathe’llcometomeetyou.你放心，他會(huì)來(lái)接你的。Ican’tanswerforitthathewillcome.我不能保證他會(huì)來(lái)。【說(shuō)明】能用于此結(jié)構(gòu)的動(dòng)詞不多，常見(jiàn)的有seeto,lookto,insiston,stickto,dependon,answerfor等。it用法總結(jié)(高三總復(fù)習(xí))(4)

動(dòng)詞+it+介詞短語(yǔ)+that-從句。如：IoweittoyouthatIamstillalive.多虧有你我才仍然活著。Itookitforgrantedthathewouldhelpus.我認(rèn)為他會(huì)幫助我們的?！菊f(shuō)明】能用于此結(jié)構(gòu)的動(dòng)詞不多，常見(jiàn)的有takeitforgranted,bringittosb’sattention,oweittosb等。it用法總結(jié)(高三總復(fù)習(xí))五、用于強(qiáng)調(diào)句型中1)It+be+被強(qiáng)調(diào)部分+that/who(aperson)從句I

metTom

in

the

parkyesterday.1)Itwas

I

who

metTomintheparkyesterday.2)It

was

Tom

whoImetintheparkyesterday.3)It

was

inthepark

that

ImetTomyesterday.4)It

was

yesterday

thatImetTominthepark.it用法總結(jié)(高三總復(fù)習(xí))2)Itisnotuntil+被強(qiáng)調(diào)的部分+that…該句型也是強(qiáng)調(diào)句型，主要用于強(qiáng)調(diào)時(shí)間狀語(yǔ)，譯成“直到…才…”，可以說(shuō)是not…until…

的強(qiáng)調(diào)形式。ItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousfilmstar.=NotuntilshetookoffherdarkclassesdidIrealizeshewasafamousfilmstar.=Ididn’trealizeshewasafamousfilmstaruntilshetookoffherdarkglasses.it用法總結(jié)(高三總復(fù)習(xí))六、it常用的固定搭配1.

makeit1)在口語(yǔ)當(dāng)中相當(dāng)于succeed,表示:成功、做到、說(shuō)定、趕上、及時(shí)到達(dá)如:It'shardtomakeittothetopinshowbusiness.2)在口語(yǔ)中相當(dāng)于fixthedatefor,表示“約定好時(shí)間”如:

—Shallwemeetnextweek?—OK.WejustmakeitnextSaturday.it用法總結(jié)(高三總復(fù)習(xí))2.takeit/thingseasy相當(dāng)于Don’tworry.用來(lái)勸告別人,表示“不要慌,別擔(dān)心,”Takeiteasy！Hewilldoitwell.3.Italldepends/thatalldepends

在口語(yǔ)中,相當(dāng)于ithasn‘tbeendecidedyet,表示“那得看情況,還沒(méi)有定下來(lái)”—Areyougoingtothecountrysideforholiday?—It/Thatalldepends.it用法總結(jié)(高三總復(fù)習(xí))4.It'suptosb.在口語(yǔ)中,相當(dāng)于it'sdecidedbysb.表示“由……決定,由……負(fù)責(zé),取決于……”

—Shallwegooutfordinner？

—It'suptoyou.it用法總結(jié)(高三總復(fù)習(xí))It’stime后的從句用虛擬語(yǔ)氣一、基本用法從句謂語(yǔ)通常用過(guò)去式表示現(xiàn)在或?qū)?lái)，有時(shí)也用過(guò)去進(jìn)行時(shí)或“should+動(dòng)詞原形”(should不能省略)，其意為“(早)該干某事了”：Ithink

It’stime

youwenttobed.

我想你該睡覺(jué)了。It’stime

wewent[weregoing,shouldgo].

我們?cè)撟吡?。I’mgettingtired.It’stimewewenthome.

我累了，我們?cè)摶丶伊?。Ithinkit’stimetheyweretaughtalesson.

我想現(xiàn)在