高中英语语法-it的用法.ppt

《高中英语语法-it的用法.ppt》由会员分享，可在线阅读，更多相关《高中英语语法-it的用法.ppt（42页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、The use of “it”Teaching aims:Help the students to master the use of “it”Teaching import points:The usage of “it” used in the subjects position to stand for the infinitive or a clause.The usage of “it” used to talk about time, date, distance or weather.The structure: It is/was + n/adj. + infinitive/c

2、lause. It is that .Teaching difficulties:How to use the sentence pattern:” It is that .” When we emphasized the noun which mean places or time.观察并思考：观察并思考：it it 在下列句中的意义和作用。在下列句中的意义和作用。p292p2921. It was very quiet at the moment .2. It is eight oclock .3. It is five kilometers from the office to my h

3、ome.4. It was rainy in spring in China.5.-Where is my book ?-Its on the table.6.-Whose exercise-book is that? Its hers.7.-Who is making such a noise? - It must be the children.8. Its kind of you to help me with the problem.9. I think it hard for you to do the task on your own.10. It was because he w

4、as ill that he didnt come to school yesterday. 11.It is high time (that ) she wrote a letter to her boyfriend . It作代词作代词1. 代替指示代词代替指示代词this，that；What is this? Its a pen.2表示时间，日期，季节，天气，光线明暗，温度，距表示时间，日期，季节，天气，光线明暗，温度，距离，环境等；离，环境等；It was very noisy (quiet) at the moment.What time is it? Its eight ocloc

5、k.It often rains in summer here.It is a long way to the school.3指代人时，一般用于小孩或身份指代人时，一般用于小孩或身份 不十分明朗的人。不十分明朗的人。1)Who is the baby? Its my teachers son 2)Who is that gentleman?Its my friend,Tom3) Who is knocking at the door? Its me.4.代替上文中提到过的人或事物。代替上文中提到过的人或事物。 John hates cats, and it is difficult to s

6、ay why. I tried to run away from the police, but it is impossible. The train has arrived. It arrived half an hour ago. it作引导词作引导词1形式主语形式主语a)代替由不定式表示的真正主语代替由不定式表示的真正主语b)代替由动名词表示的真正主语代替由动名词表示的真正主语c)代替由从句表示的真正主语代替由从句表示的真正主语2.it做形式宾语做形式宾语a)代替由不定式表示的真正宾语代替由不定式表示的真正宾语b)代替由动名词或名词短语表示代替由动名词或名词短语表示的真正宾语的真正宾语

7、c)代替由从句表示的真正宾语代替由从句表示的真正宾语3.强调结构强调结构 4.补充：有关补充：有关it的常用句型的常用句型It作代词作代词it作引导词作引导词1).代替由不定式表示的真正主语It is + adj. / n. + for/of sb.+ to doa)用用for形容词通常是表示事物的特形容词通常是表示事物的特点或特征点或特征,如：如：important (necessary, possible, impossible, easy, hard, difficult) eg: Its difficult for me to learn cooking.Its very import

8、ant for us to learn English well.b)用用 of表示人的性格特征或表示人的性格特征或特点特点,如：如：nice (cruel, kind, rude, wise, stupid, clever, foolish, polite) eg: It is silly of him to say that.2）可代替动名词表示的真正主语。常用以下结构: It+be+fun/awasteoftime/nogood/nousedoingsth Its no use going there so early. Its no good taking in much fat an

9、d sugar. Its no fun watching the same movie for a second time. 3）代替从句 It is surprising that she should have married a farmer. It is a well-known fact that smoking can cause cancer. It is well known to all that the earth is round. 2.形式宾语形式宾语1）代替不定式作为形式宾语： 主语 + v. + it+ 宾补 + to do sth. 如：I think it be

10、st to get along well with people around you. I consider it wrong to cheat in an examination. 用于此结构的动词有：consider, think, make, feel, find, believe, count, declare, deem(认为,相信), fancy, feel, guess, imagine, judge, prove, regard, see, show, suppose, think, understand, take等。2）代替动名词或动名词短语成为句 子的形式宾语。Dont

11、 you find it a waste of time watching television too much? She found it troublesome having to go through all the pages of the thick book. 3）代替从句：Didnt I make it clear to you that I was not coming?I found it very interesting to study English. I thought it strange that Jack should have had so much mon

12、ey to spend these days.3.强调结构强调结构It is / was + 被强调部分（主语，宾语，状语）+ that (被强调为人时用who / whom) + 句子的其余部分. I saw John in the street this morning It was I who / that saw John in the street this morning.（强调主语） It was John that / whom I saw in the street this morning.（强调宾语） It was in the street that I saw Joh

13、n this morning. （强调地点状语） It was this morning that I saw John in the street. （强调时间状语）-He didnt go to bed until his father came back last night.-_his father came back _he went to bed last night.unitl引导的时间状语短语或从句用于否定句引导的时间状语短语或从句用于否定句时，也可强调，不过要把时，也可强调，不过要把not与与until放在一起。放在一起。It was not untilthatWas _ t

14、hat I saw last night at the concert? A. it you B. not you C. you D. that yourself Who was it that you met in the street yesterday? 昨昨天你在街上遇到的是谁？天你在街上遇到的是谁？Where was it that you met Jack yesterday? 你昨天是你昨天是在哪里遇到杰克的？在哪里遇到杰克的？强调句型的两种变形形式：强调句型的两种变形形式：一般疑问句形式：一般疑问句形式：Is/ Was it that? 特殊疑问句形式：特殊疑问句形式：Who/

15、 Whom /When/ When 等等 + is/ was it that ? it用于下列常见的句型中用于下列常见的句型中: It seems/happens/appears (to sb)+ that clause如：好象如：好象 例：It happened that I was there then. （碰巧当时我也在场。） 例：It appears that hell be elected. （他像是会当选的样子。） 例：It occurred to me then that I had an appointment with her that evening. （当时我突然想起来我

16、本来和她在当天晚上有约会。）It is reported/said/thought/hoped/believed/ + that-clause. 据报道/据说/人们认为/人们希望/人们相信 如： It is said that the news had reached every part of the world. 据说这个消息传到世界的各个角落。 Does it matter if + clause? 要要紧吗？紧吗？ It doesnt matter (much) whether/if-clause 没有（多大）没有（多大）关系关系/都一样都一样 Does it matter if an

17、 engineer is a man or a woman?工程师是男人还是女人有关工程师是男人还是女人有关系吗？系吗？ It looks/seems as if + clause 看上去好象 It seems as if they had never seen each other before.看上去他们好象从没看上去他们好象从没见过。见过。 It looks as if its going to rain.看上去看上去天要下雨。天要下雨。 It is time (for sb.) to do sth. It is (high) time that sb. did sth.(虚拟语气) 是

18、某人该做的时候了 It is high time that Rober went to school. It is /was/will be the first/second/third time that 这是某人第几次做 It is the first time that I have been here. It was the second time that he had seen the film.注意：注意：it表示时间常用于句型：表示时间常用于句型： 1、It is/has been一段时间一段时间since 从句。意为从句。意为“自自以来已有多长时间了以来已有多长时间了”或或“

19、自不自不以来已有以来已有多长时间了多长时间了”。例如：。例如： It has been many years since I was last in London It is five months since I arrived in New York.我到我到纽约已经五个月了。纽约已经五个月了。st. 2. It is/ was/ will be + 一段时间一段时间 + before 从句。表从句。表示示“在（做某事）前过了多长时间在（做某事）前过了多长时间”，或，或“过了多长时过了多长时间才间才”。如：。如：It will be several years before we meet

20、 again. 我们要过好几年才能再见面我们要过好几年才能再见面 一、单句填空一、单句填空1.Tomsmotherkepttellinghimthatheshouldworkharder,but_didnthelp.2._isafactthatEnglishisbeingacceptedasaninternationallanguage.itIt3.Was_youthatIsawlastnightattheconcert?4.Idontthink_possibletomasteraforeignlanguagewithoutmuchmemorywork.itit5._isveryimporta

21、ntforyoutogotocollege.6.Ilikethishousewithabeautifulgardeninfront,butIdonthaveenoughmoneytobuy_.(2009四川卷四川卷)itIt7.Thefactthatshewasforeignmade_difficultforhertogetajobinthatcountry.8.Thedoctorthought_wouldbegoodforyoutohaveaholiday.itit二、写作运用二、写作运用 1._wasverysurprisingthatLucydidntpassheroralEnglish

22、test,andshecouldntbelieve_.However,_isreallyapitythatsheshouldfailinthetest.Infact,_washerlazinessthatledtoherfailureinthetest.ItitititThus,sherealizedthat_wasimportantforhertoworkhardandpracticemore,soshehasbeenworkinghardeversince.Nowshefinds_interestingandhelpfultopracticespeakingEnglishandshelik

23、es_whenshespeaksfluentEnglish. ititit2.Itwason14thApril,2010thata7.1-magnitudeearthquakehitnorthwestChinasYushuQinghaiProvince.Morethan5,000rescuersweredispatchedtoYushu,butitwastentsandmedicalequipmentthattheylackedmost.Thesoldierssaiditwasstudentsthat/whobecametheirfirstmemberstobesaved.Fortunately,itwasbecausetherescuersarrivedatthequake-hitregionintimethattheareasufferedfromlessloss.Anditwasthepowerofunityandlovethatmadethesurvivorslivewithbravery.Thank you for your attention.