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当前位置:首页 > 中学教育 > 代词一:it指示代词及其用法
it的用法用作人称代词:1、指代事物:—What’sthis?—It’sacat.2、指代人:常用于不知对方性别时,比如:询问敲门人或打电话时询问对方是谁,或者用来指代婴儿。(1)—Who’sit?—It’sSam.(2)—Who’sthebabyinthepicture?—It’smyyoungerbrother.二、用作非人称代词:指代天气、时间、季节或距离等,此时的it无意义。(1)It’stwoo’clocknow.(2)It’sverycoldinspringinthenorthernChina.(3)It’sabout100kilometersfromourtowntothebigcity.三、用作替代词:it可作形式主语、形式宾语,可代替不定式、动名词或从句。(1)Itisnotknownwhereshehasgone.(2)It’sbadforyoureyesreadinginbed.(3)Itiscleverofhimtoworkoutthemathproblem.四、用于强调句,构成“It+be+被强调部分that…”结构。如:It’sinthesmallshopthatIboughttheimportantbook.五、在初中英语教材中,出现了许多由it引导的固定句式,现归纳如下:(一)It'stimeforsb.todosth./It'stimeforsth.意为是(某人)该干……的时间了、到……的时候了。例如:1.It'stimeforsupper/tohavesupper.该吃晚饭了。2.It'stimeformetostudy.我该学习了。(二)Ittakes(sb.)sometimetodosth.意为(某人)花……时间做某事。例如:1.Ittakestwentyminutestogotoschoolbybike.骑自行车上学要花二十分钟的时间。2.Ittookmeaweektofinishreadingthebook.我花了一周时间读完这本书。(三)Itisone'sturntodosth.意为轮到某人做某事了。例如:It'syourturntobeondutytomorrow.明天轮到你值日了。(四)Itis/hasbeen+时间段+since+一般过去时,意为自从……以来已过了……(时间)。例如:1.Itis/hasbeenfourdayssinceIcaughtacold.我感冒已四天了。2.Itis/hasbeentwoweekssincewemetlast.自从我们上次见面以来已过了两周。(五)Itseems/seemed+that从句,意为看起来好像……。例如:Itseemedthatourteamwasgoingtowin.我们队看起来好像要赢了。(六)It's+表语+todosth.。例如:It'sagoodideatogooutforawalk.出去散步是个好主意。(七)It's+adj.+that从句。例如:It'struethatImayfallbehindtheotherstudents.我真可能落在别的学生后面。(八)It's+adj.+of(for)sb.+todosth.。对于这个句型究竟用of还是用for,主要取决于前面的形容词。如果形容词是描述不定式行为者的性格、品质等的,如kind,good,nice,clever等用of;如果形容词仅仅是描述行为的则用for,这类形容词常见的有difficult,easy,hard,important,dangerous等。例如:1.Itisniceofyoutocometoseeme.你能来看我真好。2.Itisdangerousforchildrentoplaywithfire.对小孩儿来说玩火是危险的。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.Iwasonlytwoyearsoldthatyear.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.It’sC.TheroadD.That’s()6.Somethingisinthebox,_______?A.aretheyB.aren’ttheyC.isn’titD.isn’tsomething()7.____saidthatthestrangemanlivesinthedeepforest.A.It’sB.IC.HeD.Someone()8.______takememuchtimetowritethatpaper.A,It’sB.It’llC.That’llD.I’ll()9.Ifound______easytoswimacrossthatriver.A.itB.thatC.meD.it’sIt放在found动词后面做宾语---形式宾语,代替todo这个不定式结构()10.—Who’sthatspeaking?—______me,Tom.A.I’mB.That’sC.It’sD.Its提高训练:完成句子1.从学校到工厂需要步行20分钟。______20minutes’walk_______theschool_______thefactory.2.这个婴儿才两岁,需要人照顾。Thebabyisonly2yearsold.________needs________________________after.3.快点!要下雨了。_______________!_______isgoingtorain.4.桌上有些面包,吃起来挺香的。deliciousThereissomebreadonthetable._______tastes__________.5.要完成这项工作至少需要20天时间。Finishatleast_____willtake___________20days____________thework.
本文标题:代词一:it指示代词及其用法
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