it用法歌诀.ppt

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1、it的用法㈠1.it作人称代词1.1.it的最基本用法是作人称代词，主要指刚提到的事物，以避免重复:Zhengzhouisabeautifulcity,isn’tit?1.2.也可以指动物或婴儿(未知性别的婴儿或孩子):Isthisyourdog？No,itisn’t.1.3.也可指抽象事物:Itwasagreatsurprisetomewhenhedidathinglikethat．2.非人称代词itit有时并不指具体的东西，而泛指天气、时间、环境等，称为非人称的it：2.1.指天气：Itisal

2、ovelyday,isn’tit?Itisabitwindy.Itisblowingonthemountain2.2.指时间:Itwasnearlymidnightwhenshecameback.2.3.指环境:Itwasveryquietinthecafé.2.4.指距离：Itishalfanhour’swalktothecitycentre.(1)Itisadj.＋for/ofsb.＋todosth.表示“某人做某事是……/对某人来说，做某事是Itisdifficulttotranslatet

3、hisarticle.ItisimportantforustolearnEnglish.(2)It(形式主语)be+n.+todo/that从句。常见的名词有：apleasure/agreathonor/apity/afact/aproblem/aquestion/goodnews等(3)It’ssaid/reported/announced/believed/thought/considered/well-known/suggested/hopedthat…表示“据说/报道/宣布……/人们说”(4

4、)It(形式主语)isnouse/nogood/uselessdoingsth.表示“做某事是没用的/没好处的……”㈡用It作形式主语的句型：(5)Itisadj.＋that-clauseItisimportantthatweshouldpaycloseattentiontograin.(6)Itisworthwhile＋doingsth./todosth.Itisworthwhilespending/tospendmuchtimeonit.(7)Ithappens＋that-clauseIthap

5、penedthatJohnwastheonlywitness.碰巧约翰是唯一的证人。(8)Itoccursto/strikessb.＋that-clause某人突然想到……Itsuddenlyoccurredto/struckmethatIhadn’tseenPeterallday.(9)Ittakessb.sometimetodosth.Ittookusonemonthtocompletethisproject.我们花了一个月完成这项工程。（三）It作形式宾语的句型:(1)主语＋vt.(think

6、/consider/feel/suppose/believeetc.)＋it＋adj＋todosth..Ifounditdifficulttoexplaintohimwhathappened.我觉得向他解释清发生了什么事很困难。(2)主语＋vt.＋it＋useful/useless/nogood/nouse＋doingsth.Hethoughtitnousegoingoverthesubjectagain.他认为再讨论这个问题没有用了。(3)主语＋vt.＋it＋adj.＋thatclauseHedi

7、dn’tmakeitclearwhenandwherethemeetingwouldbeheld.他没有明确说明会议在什么时间、什么地点举行。(5)表示喜欢，恨等心理方面的动词如:like,love,hate,appreciate,dislike等后加上it作形式宾语，再加上that/if/wh-从句等作真正宾语。I’dappreciateitifyouwouldliketoteachmehowtousethecomputer.如果你愿意教我如何用电脑我将不胜感激。Ihateitwhenpeople

8、talkwiththeirmouthsfull.Wethinkitourdutytocleanourclassroomeveryday.HefeltitimportantlearningEnglishwell.Theyfounditdifficultthattheywouldfinishtheirworkintwodays.（四）.It的一些习惯用法Howisitwithyourstudy?学习好吗？That’sit.这就对了。Itwenthardwithhim.他身