《高中英语it的用法课件ppt.ppt》由会员分享，可在线阅读，更多相关《高中英语it的用法课件ppt.ppt（64页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分The Usage of “it”基本用法基本用法常见用法常见用法特殊用法特殊用法三个考点三个考点三个句型三个句型四个句型四个句型三个替代词三个替代词三个三个it 后接后接时间段时间段的句型的句型it is the first time thatIt is when易误辨析易误辨析强调句型强调句型形式宾语形式宾语形式主语形式主
2、语变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分Its 10:08Its lovely It weighs only 3 kilosIts a large sum of money变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分指时间指时间:It was nearly midnight when she came back.So you are going to be married this time？When is
3、 it？指环境指环境:It was very quiet in the caf.指距离指距离：It is half an hours walk to the city centre. 不知性别的人不知性别的人：Who is it? -Its me.Her face lighted when she saw who it was. 指某件事：指某件事：It doesnt matter. /It is a shame, isnt it?变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分it可用来指代前文提到的人可
4、用来指代前文提到的人,物或事情物或事情,也可以用来也可以用来指时间指时间,金钱金钱,距离距离,天气等自然现象天气等自然现象基本用法基本用法: :变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 _ was a sunny day. Peter decided to go for a walk to the park, though _ was two miles away. _ was so comfortable to walk on the street. itItIt变电站电气主接线是指变电站的变压器
5、、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 Suddenly _began to rain. He found _ hard to walk there. Then he took a bus home. Unfortunately _ went wrong. When he got home, he was wet through. Thus _ was a day that he would never forget.itititit变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接
6、线是电力系统接线组成中一个重要组成部分 The Parkers bought a new house but _ will need a lot of work before they can move in. A. they B. it C. one D. which2. Weve been looking at houses but havent found _ we like yet. A. one B. ones C. it D. them3. Im moving to the countryside because the air there is much fresher than
7、 _ in the city. A. ones B. one C. that D. those易误辨析易误辨析: :it / one / thatBACthe house that the Parkers boughta housethe air变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 possible/clear/obvious/certain1.It is / was + necessary/important/natural + ( for sb. ) to do sth. / clause
8、ones duty/a pity/ a shame/an honour 2.It +is /was + n. ones hope + that /( for sb. ) to do sth. said/known/believed/thought that-clause3.It is / was p.p. suggested ( ordered /insisted/commanded （虚拟语气）（虚拟语气）形式主语形式主语4. It happens (seems， appears) that. It takes /took/will take + to do 变电站电气主接线是指变电站的变压
9、器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分1. It is necessary to be prepared for a job interview. Having the answers ready will be of great help.2. The Foreign Minister said, “It is our hope that the two sides will work towards peace.”3. It is known to everybody that the moon travels round
10、the earth once every month.形式主语形式主语高考真题高考真题变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 find possible S+ think + it + necessary +( for sb. ) to do sth. /that feel important Sentence patterns:Sentence patterns:形式宾语形式宾语 a rule2. S+ V + it + ones duty + ( for sb. ) to do sth. /t
11、hat an honour 3. S + V + it + no good + doing sth. no use/useless/a waste of time 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分I like _ in the autumn when the weather is clear and bright.(04全国)A. this B. that C. it D. one点拨点拨: :这是这是it it作形式宾语的一种特殊用法作形式宾语的一种特殊用法. .少数动词少数动词( (如如
12、like, like, love, enjoy, dislike, hate, appreciatelove, enjoy, dislike, hate, appreciate等等) )或包含介词的或包含介词的动词短语动词短语( (如如see to, depend onsee to, depend on等等) )后接宾语从句后接宾语从句, ,必须先由必须先由it it担任形式宾语担任形式宾语, ,再接从句再接从句. . I like (enjoy, hate) it when I would appreciate it if see to (depend on) it thatSentence
13、 patterns:C形式宾语形式宾语变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 Please see to it that the door is locked. See to it that you are here on time tomorrow morning. You may depend on it that it is true. You may depend on it that we support you You may depend on it that he will tur
14、n up in time. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 It was _ back home after the experiment. A. not until midnight did he go B. until midnight that he didnt go C. not until midnight that he went D. until midnight when he didnt go In which play is _ your brother appears
15、? A. that where B. this when C. it that D. it where It was in the lab _ was taken charge of by Professor Zhang _ they did the experiment. A. where; that B. which ; where C. that ; where D. which; that强调句型强调句型被强调的部被强调的部分是分是not until引导的时间引导的时间 状语状语?强调句型用于疑强调句型用于疑问句问句, , 被强调的被强调的部分是特殊疑问部分是特殊疑问词或从句引导词词或
16、从句引导词?In which play is it that?It is thatIs it that?I dont know in which play it is that强调句型和强调句型和各种从句各种从句高考热点高考热点?变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分1.It was not until 1920 _ regular radio broadcasts began. A. while B .which C .that D. since2.I just wonder _ that ma
17、kes him so excited. A. why it does B. what he does C. what is it D. what it is3.Do you have enough glasses for each guest to have _? A. it B. them C. that D. one 4.-Why dont we take a little break? -Didnt we just have _? A. it B. that C. one D. this 5. Is _student _was caught smoking in the classroo
18、m? A. it that, that B. that it, it C. it it, that D. it which, that变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分1. (2007,浙江浙江) It _ we had stayed together for a couple of weeks _ I found we had a lot in common. A. was; when B. was that; that C. wasnt until; when D. wasnt until
19、; that 正确答案：正确答案：D。易判断这是考查。易判断这是考查not until的强调形式。的强调形式。 2. (2008，重庆，重庆) It was not until midnight _ they reached the camp site. A. that B. when C. while D. as 正确答案：正确答案：A。 3. (2007,山东山东)Where did you get to know her?It was on the farm _we worked. A. that B. there C. which D. where正确答案：正确答案：D。答句完整形式应
20、为：。答句完整形式应为：It was on the farm where we worked that I got to know her.变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分1.Its years _(since, before, after, that) I painted this beautiful picture.2.It will be years _(since, before, after, that) I paint this beautiful picture.3.It wa
21、s years _(since, before, after,that) I painted this beautiful picture.4.Its for years _(since, before, after, that) I have painted this beautiful picture.易误辨析易误辨析: :It is +时间段时间段+since(过去时过去时).It + was + 时间段时间段 + before(过去时过去时)It + will be +时间段时间段 +before(一般现在时一般现在时)since before beforethat变电站电气主接线是指
22、变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分Translate the following: 过了很久他才回来. 2. 我们很久后才会见面的.3. 我离开这所学校已经很久了.It was long before he came back.It will be long before we meet again.It is long since I left this school.1.It is +时间段时间段+since(过去时过去时).2.It + will be +时间段时间段 +before(一般现在时一般现在时)
23、3.It + was + 时间段时间段 + before(过去时过去时)易误辨析易误辨析: :变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分4. It is the first ( second . ) time that sb has/have done sthIt was the first time that sb had done sthIt is the first time I have been here. = This is the first time I have been here.
24、 5. It is . when .。 该句型中的该句型中的 when 引导的是一个引导的是一个时间状语从句时间状语从句，主句中的主句中的 it 指时间，表语由指时间，表语由具体的时间具体的时间充当，常充当，常译为当的时候，是译为当的时候，是 It was 5 oclock when he came here 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分1、(2008, 北京北京) Im sorry youve been waiting so long, but itll still be some t
25、ime _ Brian gets back. A. before B. since C. till D. after2. (2006,福建福建) How long do you think it will be _ China sends a manned spaceship to the moon?-Perhaps two or three years. A. when B. until C. that D. before3、(2005,安徽安徽) That was really a splendid evening. Its years _ I enjoyed myself so much
26、. A. when B. that C. before D. since4. (2006,辽宁辽宁) It was after he got what he had desired _ he realized it was not so important. A. that B. when C. since D. as 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分在一些固定用法中考查在一些固定用法中考查常见的固定用法有常见的固定用法有: make it 成功，安排在或定在某时间成功，安排在或定在某时间f
27、orget it 别提了，忘了它吧别提了，忘了它吧Dont mention it 别提了，表示不用谢别提了，表示不用谢It doesnt matter 没关系没关系It(That) depends 视情况而定视情况而定You guessed it 你猜着了你猜着了Its hard to say 很难说很难说 Its up to you to do sth.由你来决定做某事由你来决定做某事变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 S+ think + it + necessary +( for sb.
28、 ) to do sth. The chairman thought _ necessary to invite Professor Smith to speak at the meeting.(05全国)A. that B. it C. this D. himSentence patterns:B find possiblefeelimportant /that形式宾语形式宾语变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 2. S+ V + it + ones duty + ( for sb. ) t
29、o do sth. /that 3. S + V + it + no good + doing sth. no use 形式宾语形式宾语I think it his duty to clean the blackboard.Sentence patterns: a rulean honour变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 It is clear ( obvious， true， possible， certain.) that . 该句型中该句型中it 是形式主语，真正的主语是是形式主语，
30、真正的主语是that 引导引导的主语从句，常译为的主语从句，常译为“清楚（显然，真的，肯清楚（显然，真的，肯定）定）”是主语从句最常见的一种结构。是主语从句最常见的一种结构。 It is very clear that hes round and tall like a tree. = That hes round and tall like a tree is very clear. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分4. It is important ( necessary， stran
31、ge， natural.) that . 该句型和上一个同属一个句型；由于主句中的形该句型和上一个同属一个句型；由于主句中的形容词不同，容词不同，that 后的从句中要用虚拟语气后的从句中要用虚拟语气.It is important that we (should) learn English well. It is necessary that he (should) remember these words. 5. It is said (reported,thought,believed.) that . It is said that he has come to Beijing. I
32、t is reported that another earth satellite has been put into orbit. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分6. It is suggested ( ordered /demanded/insisted/commanded. ) that . 该句型和上一个同属一个句型，主句中的过去分该句型和上一个同属一个句型，主句中的过去分词是表示请求，建议，命令等词时，词是表示请求，建议，命令等词时，that后的从后的从句要用虚拟语气（句要用虚
33、拟语气（should + 动词原形），动词原形），should 可以省；常译为可以省；常译为“据建议；有命令）据建议；有命令） It is suggested that the meeting ( should ) be put off. It was ordered that we ( should ) arrive there in two hours. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分7. It is a pity ( a shame . ) that . 该句型中，该句型中，that
34、后的从句一般用虚拟语气（后的从句一般用虚拟语气（should + 动动词原形），词原形），should可省去表示出乎意料，常译为竟可省去表示出乎意料，常译为竟然。没有这种意义时，则不用虚拟语气。然。没有这种意义时，则不用虚拟语气。 It is a pity that such a thing ( should ) happen in your class. It is a pity that he is ill. 他生病了，真遗憾！他生病了，真遗憾！ 8. It is time ( about time ，high time ) that . 该句型中该句型中that 后的从句应该用虚拟语气，
35、值得注意的是后的从句应该用虚拟语气，值得注意的是 常用过去时态表示虚拟常用过去时态表示虚拟 有时也用有时也用should + 动词动词原形，原形，should 不能省，常译为是（正是）的时不能省，常译为是（正是）的时侯侯 It is time that children should go to bed. = It is time that children went to bed. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分13. It happens (seems， appears) that.
36、该句型中该句型中it是形式主语，是形式主语，that 引导的是主语从句，引导的是主语从句，主句中的主句中的happen ， seem等词是不及物动词。等词是不及物动词。 It happened ( so happened ) that he met his teacher in the street. 碰巧碰巧. It seems that he will be back in a few days. 看看来来 14. It takes sb. . to do sth. It took thousands of people many years to build the Great Wall
37、. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分15. It is no good (use ) doing sth. 该句型中的真正主语是动名词短语，主句中的表该句型中的真正主语是动名词短语，主句中的表语可以是语可以是no good ， ( not any good ) ， no use ， ( not any use )。 It is no good learning English without speaking English. 16. It doesnt matter whether ( i
38、f ) . 该句型中该句型中whether(if) 引导的从句是真正主语，该引导的从句是真正主语，该句型常译为不论（是否）没关句型常译为不论（是否）没关系。系。It doesnt matter if they are old. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分17. It is kind ( of sb. ) to do sth. 该句型中的不定式短语是真正主语，如果不定该句型中的不定式短语是真正主语，如果不定式的逻辑主语是由式的逻辑主语是由 of引起，主句中的形容词必引起，主句中的形容词必
39、须是能表示逻辑主语特征的形容词。须是能表示逻辑主语特征的形容词。 常见的有：常见的有： bad ， brave ， careless， clever ， cruel ， foolish ， good （好心（好心的），的）， honest ， horrible ， kind ， lazy ， modest ， naughty ， nice（有教养的），（有教养的）， polite， rude ， silly ， stupid ， wise ， wrong（错误的）等。（错误的）等。 这个句型可以改写为：这个句型可以改写为：sb. is kind to do sth. 。 It is kind
40、of you to say so. = You are kind to say so. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分18. It is necessary ( for sb. ) to do sth. 该句型与上一个同属一个句型，如果不定式的逻该句型与上一个同属一个句型，如果不定式的逻辑主语是由辑主语是由for引起，主句中的形容词通常是表示引起，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况重要性，紧迫性，频繁程度，难易，安全等情况的形容词。的形容词。 常见的形容词有
41、：常见的形容词有： important， necessary， natural easy ， safe ， common ， normal ， hard ， difficult ， dangerous ， unusual， rare ， impossible ， pleasant等。等。 =在中的形容词作表语可以用从句改写，在中的形容词作表语可以用从句改写， 如：如： It is important for her to come to the party. = It is important that she (should ) come to the party. 变电站电气主接线是指变电
42、站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分It is the ability to do the job_ matters not where you come from or what you are. A. one B. that C. what D. itIt is / was + 被强调的部分被强调的部分 +that / who+句子其他句子其他成分成分强调句型强调句型高考真题高考真题变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部
43、分.it的重要句型的重要句型1. It is + 被强调部分被强调部分 + that . 该句型是强调句型。将被强调的部分放在前该句型是强调句型。将被强调的部分放在前面，其它部分置于面，其它部分置于that之后，被强调部分可以之后，被强调部分可以是主语，宾语，表语或状语，强调的主语如果是主语，宾语，表语或状语，强调的主语如果是人，是人，that可以由可以由who换用。如果把这种句型换用。如果把这种句型结构划掉后，应该是一个完整无缺的句子；这结构划掉后，应该是一个完整无缺的句子；这也是判断强调句型与其它从句的方法。也是判断强调句型与其它从句的方法。 It was about 600 years
44、ago that the first clock with a face and an hour hand was made. It was they that (who ) cleaned the classroom yesterday. It was in the street that I met her father. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分2. It is not until + 被强调部分被强调部分 + that . 该句型也是强调句型。主要用于强凋时间状语，该句型也是
45、强调句型。主要用于强凋时间状语，译成汉语直到才，可以说是译成汉语直到才，可以说是 not . until . 的强调形式。的强调形式。 It was not until she took off her dark glasses that I realized she was a famous film star. = Not until she took off her dark glasses did I realize she was a famous film star. = I didnt realize she was a famous film star until she to
46、ok off her dark glasses. 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分 The Parkers bought a new house but _ will need a lot of work before they can move in. A. they B. it C. one D. which2. Weve been looking at houses but havent found _ we like yet. A. one B. ones C. it D. them
47、3. Im moving to the countryside because the air there is much fresher than _ in the city. A. ones B. one C. that D. those易误辨析易误辨析: :it / one / thatBACthe house that the Parkers boughta housethe air变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分在一些固定用法中考查在一些固定用法中考查常见的固定用法有常见的固定用法
48、有: make it 成功，安排在或定在某时间成功，安排在或定在某时间forget it 别提了，忘了它吧别提了，忘了它吧Dont mention it 别提了，表示不用谢别提了，表示不用谢It doesnt matter 没关系没关系It(That) depends 视情况而定视情况而定You guessed it 你猜着了你猜着了Its hard to say 很难说很难说 Its up to you to do sth.由你来决定做某事由你来决定做某事变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分
49、Do you want to live another 100 years or more? Some experts say that scientific advances will one day enable humans to last tens of years beyond what is now seen as the natural limit of the human life span There is a great push so that people can live from 120 to 180 years,” he said. “Some have sugg
50、ested that there is no limit and that people could live to 200 or 300 or 500 years.” However, many scientists who specialize in ageing are doubtful about it.(04全国全国D) The underlined “it”refers to _ A. a great push B. the idea of living beyond the present life span C. the idea of living from 200 to 3