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1、it的用法用作人稱(chēng)代詞:1、指代事物:—What’sthis?—It’sacat.2、指代人:常用于不知對(duì)方性別時(shí),比如:詢(xún)問(wèn)敲門(mén)人或打電話時(shí)詢(xún)問(wèn)對(duì)方是誰(shuí),或者用來(lái)指代嬰兒。(1)—Who’sit?—It’sSam.(2)—Who’sthebabyinthepicture?—It’smyyoungerbrother.二、用作非人稱(chēng)代詞:指代天氣、時(shí)間、季節(jié)或距離等,此時(shí)的it無(wú)意義。(1)It’stwoo’clocknow.(2)It’sverycoldinspringinthenorthernChina.(3)It’
2、sabout100kilometersfromourtowntothebigcity.三、用作替代詞:it可作形式主語(yǔ)、形式賓語(yǔ),可代替不定式、動(dòng)名詞或從句。(1)Itisnotknownwhereshehasgone.(2)It’sbadforyoureyesreadinginbed.(3)Itiscleverofhimtoworkoutthemathproblem.四、用于強(qiáng)調(diào)句,構(gòu)成“It+be+被強(qiáng)調(diào)部分that…”結(jié)構(gòu)。如:It’sinthesmallshopthatIboughttheimportantbo
3、ok.五、在初中英語(yǔ)教材中,出現(xiàn)了許多由it引導(dǎo)的固定句式,現(xiàn)歸納如下: (一)It'stimeforsb.todosth./It'stimeforsth.意為"是(某人)該干……的時(shí)間了"、"到……的時(shí)候了"。例如:1.It'stimeforsupper/tohavesupper.該吃晚飯了。2.It'stimeformetostudy.我該學(xué)習(xí)了。(二)Ittakes(sb.)sometimetodosth.意為"(某人)花……時(shí)間做某事"。例如:1.Ittakestwentyminutestogotoschool
4、bybike.騎自行車(chē)上學(xué)要花二十分鐘的時(shí)間。2.Ittookmeaweektofinishreadingthebook.我花了一周時(shí)間讀完這本書(shū)。(三)Itisone'sturntodosth.意為"輪到某人做某事了"。例如:It'syourturntobeondutytomorrow.明天輪到你值日了。(四)Itis/hasbeen+時(shí)間段+since+一般過(guò)去時(shí),意為"自從……以來(lái)已過(guò)了……(時(shí)間)。"例如:1.Itis/hasbeenfourdayssinceIcaughtacold.我感冒已四天了。2.Iti
5、s/hasbeentwoweekssincewemetlast.自從我們上次見(jiàn)面以來(lái)已過(guò)了兩周。(五)Itseems/seemed+that從句,意為"看起來(lái)好像……"。例如:Itseemedthatourteamwasgoingtowin.我們隊(duì)看起來(lái)好像要贏了。(六)It's+表語(yǔ)+todosth.。例如:It'sagoodideatogooutforawalk.出去散步是個(gè)好主意。(七)It's+adj.+that從句。例如:It'struethatImayfallbehindtheotherstudents.我
6、真可能落在別的學(xué)生后面。(八)It's+adj.+of(for)sb.+todosth.。對(duì)于這個(gè)句型究竟用of還是用for,主要取決于前面的形容詞。如果形容詞是描述不定式行為者的性格、品質(zhì)等的,如kind,good,nice,clever等用of;如果形容詞僅僅是描述行為的則用for,這類(lèi)形容詞常見(jiàn)的有difficult,easy,hard,important,dangerous等。例如:1.Itisniceofyoutocometoseeme.你能來(lái)看我真好。2.Itisdangerousforchildrento
7、playwithfire.對(duì)小孩兒來(lái)說(shuō)玩火是危險(xiǎn)的。典例()1.—Who’sknockingatthedoor?—Idon’tknow.Maybe___ismyuncle.A.heB.thatmanC.itD.She()2.—Ihaveonlytwodollarswithme.—Oh,____enoughtobuythisbook.A.it’sB.that’sC.you’reD.they’re()3.—Who’sthatbabyinthephoto?—_____me.Iwasonlytwoyearsoldthatyea
8、r.A.That’sB.It’sC.I’mD.Thebaby’s()4.______fiveyearssinceIleftthattown.A.That’sB.They’reC.Thetime’sD.It’s()5.___abouttenminutes’walkfrommyhometothefactory.A.ThewayisB.