高二英语课件 It的用法 人教版

课件34张PPT。It的用法It’s 10:08It’s lovely It weighs only 3 kilosIt’s a large sum of money
2.2.指时间:It was nearly midnight when she came back.2.3.指环境:It was very quiet in the café.2.4.指距离：
It is half an hour’s walk to the city centre. 3.it的其他用法
3.1.表示谁在做某事的句子：Who is it? ---It’s me.Her face lighted when she saw who it was. 3.2.用来泛泛的指某件事：So you are going to be married this time？When is it？It doesn’t matter.It is a shame, isn’t it?it可用来指代前文提到的人,物或事情,也可以用来指时间,金钱,距离,天气等自然现象基本用法:

1. S+ think + it + necessary +( for sb. ) 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 …
possiblefeel
…important
…/clause形式宾语

2. S+ V + it + one’s duty + ( for sb. ) to do sth. /clause
3. S + V + it + no good + doing sth.
no use 形式宾语I think it his duty to clean the blackboard.Sentence patterns: …
a rulean honour
… … …
find possible
S+ think + it + necessary +( for sb. ) to do sth. /clause
feel important
… …Sentence patterns:形式宾语 …
a rule
2. S+ V + it + one’s duty + ( for sb. ) to do sth. /clause
an honour
…
3. S + V + it + no good + doing sth.
no use 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:这是it作形式宾语的一种特殊用法.少数动词(如like, love, enjoy, dislike, hate, appreciate等)或包含介词的动词短语(如see to, depend on等)后接宾语从句,必须先由it担任形式宾语,再接从句.I like (enjoy, hate…) it when….
I would appreciate it if…
…see to (depend on…) it that…Sentence patterns:C形式宾语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 the earth once every month.形式主语高考真题 It is clear ( obvious， true， possible， certain....) that ..... 该句型中it 是形式主语，真正的主语是that 引导的主语从句，常译为＂清楚（显然，真的，肯定．．．）＂　是主语从句最常见的一种结构。 　　 It is very clear that he’s round and tall like a tree. 　　 = That he’s round and tall like a tree is very clear. 4. It is important ( necessary， strange， natural...) that ... 该句型和上一个同属一个句型；由于主句中的形容词不同，that 后的从句中要用虚拟语气（should + 动词原形），should 可以省去，建议记住该句型中的形容词。 It is important that we (should) learn English well. 　　 It is necessary that he (should) remember these words.
5. It is said (reported， learned....) that ... 该句型中的it 仍是形式主语，真正主语是that 引导的主语从句；该结构常译为＂据说（据报道，据悉．．．）＂。 　　 It is said that he has come to Beijing. 　　 It is reported that another earth satellite has been put into orbit. 6. It is suggested ( ordered /demanded/insisted/commanded... ) that ... 该句型和上一个同属一个句型，主句中的过去分词是表示请求，建议，命令等词时，that　后的从句要用虚拟语气（should + 动词原形），should 可以省；常译为＂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. 7. It is a pity ( a shame ... ) that ... 该句型中，that后的从句一般用虚拟语气（should + 动词原形），should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。 It is a pity that such a thing ( should ) happen in your class. 这种事竟然发生在你们班上，真是遗憾！ 　 It is a pity that he is ill. 他生病了，真遗憾！
8. It is time ( about time ，high time ) that ... 该句型中that 后的从句应该用虚拟语气，值得注意的是① 常用过去时态表示虚拟．② 有时也用should + 动词原形，should 不能省，常译为＂是（正是）．．．的时侯．．．＂ 　　 It is time that children should go to bed. 　　 = It is time that children went to bed. 9. It is the first ( second ... ) time that ... 该句型要和上一个句型区别开来，该句型中的 that 从句不用虚拟语气，而用完成时态，。至于用什么完成时态，由主句的谓语动词的时态决定。如果是一般现在时，后面从句用现在完成时态；如果是一般过去时，后面从句则用过去完成时态，该结构中 that 可以省去；it有时用 this 替换．常译为＂是第一（二）．．．次．．．＂。 It is the first time I have been here. = This is the first time I have been here.
10. It is .... since ...。 该句型主要用作处理瞬间动词的完成时，又要和表示一段时间的时间状语连用的问题，主句中是时间作表语，其时态是现在时或完成时，since 引导的从句通常是一般过去时态，而且是瞬间动词。如果主句是一般过去时，从句则用过去完成时。 　　 It is ( has been ) 5 years since his father died. 11. It is ... when ...。 该句型中的 when 引导的是一个时间状语从句，主句中的 it 指时间，表语由具体的时间充当，常译为＂当．．．的时候，是．．．＂ 　　 It was 5 o’clock when he came here.
12. It be ... before ... 该句型主句中的 it 指时间， 主句中的时态常是将来一般时或过去时两种时态．主句中的表语多是long， not long ， 3 days ， 2 weeks 等表示时间段的词或短语，常译为＂．．．之后．．．＂。 It was 3 days before he went to Beijing. It will be not long before he finishes his job.
13. It happens (seems， appears) that... 该句型中it是形式主语，that 引导的是主语从句，主句中的happen ， seem等词是不及物动词。 It happened ( so happened ) that he met his teacher in the street. 碰巧．．. It seems that he will be back in a few days. 看来．．． 14. It takes sb. ... to do sth. 该句型中的不定式是真正的主语，it是形式主语，句型中的直接宾语是时间，常译为＂做．．．要花费某人．．．＂。 　　 It took thousands of people many years to build the Great Wall.
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 doesn’t matter whether ( if ) ... 该句型中whether(if) 引导的从句是真正主语，该句型常译为　＂不论（是否）．．．没关系．．．。　It doesn’t matter if they are old. 17. It is kind ( of sb. ) to do sth. 该句型中的不定式短语是真正主语，如果不定式的逻辑主语是由 of引起，主句中的形容词必须是能表示逻辑主语特征的形容词。 常见的有： bad ， brave ， careless， clever ， cruel ， foolish ， good （好心的）， honest ， horrible ， kind ， lazy ， modest ， naughty ， nice（有教养的）， polite， rude ， silly ， stupid ， wise ， wrong（错误的）等。 这个句型可以改写为：sb. is kind to do sth. 。　 It is kind of you to say so. = You are kind to say so. 18. It is necessary ( for sb. ) to do sth. 该句型与上一个同属一个句型，如果不定式的逻辑主语是由for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，安全等情况的形容词。 常见的形容词有：① important， necessary， natural ② easy ， safe ， common ， normal ， hard ， difficult ， dangerous ， unusual， rare ， impossible ， pleasant等。 =在①中的形容词作表语可以用从句改写， 如： It is important for her to come to the party. = It is important that she (should ) come to the party. …
possible
It is / was + adj. necessary + ( for sb. ) to do sth. / clause
important
… …
one’s duty
It +is /was + n. one’s hope + clause /( for sb. ) to do sth.
an honour
… …
said
It is / was p.p. known + that-clause
believed
…形式主语PracticeIt is the ability to do the job__ matters not where you come from or what you are.
A. one B. that C. what D. it
It is / was + 被强调的部分 +that / who+句子其他成分强调句型高考真题 It was ___ back home after the experiment.
A. not until midnight did he go
B. until midnight that he didn’t go
C. not until midnight that he went
D. until midnight when he didn’t go

In which play is ___ your brother appears?
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强调句型被强调的部分是not until引导的时间 状语?强调句型用于疑问句, 被强调的部分是特殊疑问词或从句引导词
?In which play is it that…?It is …that…Is it …that…?I don’t know in which play it is that…强调句型和各种从句高考热点?
Exercise BarThe Parkers bought a new house but ___ will need a lot of work before they can move in.
A. they B. it C. one D. which
2. We’ve been looking at houses but haven’t found ___ we like yet.
A. one B. ones C. it D. them
3. I’m 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:it / one / thatBACthe house that the Parkers boughta housethe air1.It’s 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 was years ___(since, before, after,that) I painted this beautiful picture.
4.It’s for years ___(since, before, after, that) I have painted this beautiful picture.易误辨析: 表示从since 从句谓语动作发生以后到现在所经过的一段时间，译为“自从......以来已多久了” It is +时间段+since(过去时)...表示从过去某一时间到before从句谓语动作发生所经过的一段时间,译为“多长时间后才/就做了…”It + was + 时间段 + before(过去时)…表示从现在起到before从句谓语动作发生所经过的一段时间,译为“多长时间后才会/就会做…”It + will be +时间段 +before(一般现在时)…______________________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.It is +时间段+since(过去时)...It + will be +时间段 +before(一般现在时)…It + was + 时间段 + before(过去时)…易误辨析: 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 suggested 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 300 years
D. the conservative estimateReading comprehension走进2014年高考1. If I can help ___, I don’t like working late into the night.
A. so B. that C. it D. them
2.As the busiest woman in Norton, she made ___ her duty to look after all the other people’s affairs in that town.
A. this B. that C. one D. it
3. I’d appreciate ___ if you would like to teach me how to use the computer.
A. that B. it C. this D. you
4. ____ is our belief that improvements in health care will lead to a stronger, more prosperous economy.
A. As B. That C. This D. It5. I just wonder ___ that makes him so excited.
A. why it does B. what he does
C. how it is D. what it is
6. Catherine bought a postcard of the place she was visiting, addressed ___ to ___ and then posted it at the nearby post office.
A. it; her B. it; herself
C. herself; her D. herself; herself
7. It’s already 10 o’clock I wonder how it ___ that she was two hours late on such a short trip.
A. came over B. came out
C. came about D. came upThe
Usage
of
“it”基本用法常见用法
特殊用法三个考点三个句型三个句型三个替代词
三个it 后接时间段的句型易误辨析强调句型形式主语形式宾语SummaryHomework1.Collect as many phrases and the sentence patterns including “it” as you can .
2.Finish the exercises on your
piece of paper.Thank you