the usage of it
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| 名称 | the usage of it |  | |
| 格式 | rar | ||
| 文件大小 | 24.5KB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（新课程标准） | ||
| 科目 | 英语 | ||
| 更新时间 | 2009-09-02 19:55:00 | ||
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课件9张PPT。the usage of itIt 作为人称代词，用来表示动物或无生命的物体等；; It 在句中可表示“时间”、“距离”、“自然现象”等；It 还可引导一些固定句型； It 在句子中可充当形式主语、宾语等。一、it 作为人称代词。
It 可以指代前面提到的事物(动物、植物及无生命的东西)： 1) Look at the bird, it always comes to my window. 2) I planted a tree last year and it is about two meters high. 3) He is weak at grammar and he realized it.
It 可以指上文提到的整个事情： Well, you mustn’t play on the road. It’s very dangerous.3.可以指代人： 1）指代心目中不太清楚的人，常在打电话或敲门时用； --- Who is knocking at the door? --- It’s me. 2）指代心目中指的人； --- Look! Someone is coming. Who can it be? 3）指代性别不详的婴幼儿； Look at the little baby. It’s so small. 4）在问句中有指示代词作主语时，回答常用it指人. --- Who’s that? Is it Helen? --- Yes, you’re right. It’s Helen.
二、it 作为无人称代词指时间、距离、自然现象及环境、形势等： 1） It’s eight o’clock in the morning. It’s winter now. The weather is cold . 2）It’s only five minutes’ walk from here. 3）It is going to rain. 4）If it’s convenient, I can see you tomorrow.
1. It is time for sth It’s time for harvest.(for sb) to do sth It’s time for us to go to bed.that 从句 It’s time that we went to bed.2. It is /was the first (second---) time that 从句 1) It is the fourth time that he has attempted to escape. 2) It was the second time that I had visited Beijing last year.
3. It +be (is/was/has been) + 时间段+ since 从句 1) It is/has been five years since I began to study English. 2) It was two years since she left school.
4. It +be (was/will be) + 时间段 +before 从句 (过多久后才---) 1) It’ll be half a year before I see you again. 2) It was two months before I returned school.
It 指时间的其他用法三、it可以用作形式主语，常见的句型有：
It is/was + 形容词 + (for sb) to do sth. It isn’t easy for some smoker to quit smoking.
It is/was + 形容词 + of sb to do sth. It’s kind of you to help me to do it.
It + 系动词 + 形容词 + to do sth. It seemed impossible for her to finish the work before six.
It is/was + 形容词/名词 + doing sth. 1) It’s a waste of time waiting here. 2) It’s no use/good waiting here.
It is/was + 形容词 + 从句
It is clear( plain true certain sure obvious---) +that 从句(陈述语气)It is important (necessary---) + that 从句(虚拟语气)1) It is amazing that at my age I am still fit enough to cycle 20 kilometres in an afternoon. 2) It is important that we (should) learn a special skill.6. It is/was + 名词词组 + to do sth It’s a pity to miss the early bus that 从句 It’s a wonder that you could work out the hard problem on your own.one’s turn/duty, pleasure, a pity, great fun, a habit, time, a ruler, a shame, no/a wonder，a suggestion/my wish(虚拟语气)7. It is/was/has been + 过去分词+ that从句 1) It has been found that some people have to try several times before they finally stop smoking. 2) It is suggested that some measures (should) be taken to stop pollution.
8. It took/takes sb some time to do sth. It takes him fifteen minutes to go to school every day.
9. It cost/costs sb some money to do sth. It cost me 100 yuan to buy this coat.
10. It + 动词 + 主语从句 It doesn’t matter whether he comes or not.四、It作形式宾语，代替后面的真正宾语(不定式，动名词和从句). 常见的句型结构：主语+谓语+ it + adj./n + to do/doing/从句。 常用于此句型的动词有：make, think, feel, find, consider等。 1). Your mother told me that you have started smoking and that you are finding it difficult to give up. 2). They make it clear to the public that they are doing an important and necessary job. 3). He feels it his duty to take care of her.
五、it可用来引导强调句型。 强调句型：It is/was + 被强调部分 + that/who + 其它成分 1. It was I that/who sent the boy to the hospital. 2. Was it during the war that the boy’s father died? 3. Why was it that the young man was put into the prison?-六、在短语ask for(请求), depend on(依靠), answer for(负责，担保), insist on(坚持), see to(确保，负责) 等后接that 从句时，必须用形式宾语it. 1). She will answer for it that he passes the exam. 2). Would you see to it that the children get good rest after the exercises?
七、某些及物动词如：like, love, enjoy, prefer, hate, appreciate 等之后若没有宾语，而直接跟上if/when 的从句时，要在从句前加上it. 1). I would appreciate it if you help me with the problem. 2). I like it where the river is clear and the sky is blue. 3). I hate it when someone is laughing and speaking with food in her/his mouth.
I don’t mind her criticizing me, but _____ is how she does it that I object to. A. it B. that C. this D. which
____ worries me the way he keeps changing his mind. A. This B. That C. What D. It
If I can help_____, I don’t like working late into the night. A. so B. that C. it D. them
It remains______ whether Jim’ll be fit enough to plat in the finals. A. see B. to be seen C. seeing D. to see
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. it ExercisesADCBB
It 可以指代前面提到的事物(动物、植物及无生命的东西)： 1) Look at the bird, it always comes to my window. 2) I planted a tree last year and it is about two meters high. 3) He is weak at grammar and he realized it.
It 可以指上文提到的整个事情： Well, you mustn’t play on the road. It’s very dangerous.3.可以指代人： 1）指代心目中不太清楚的人，常在打电话或敲门时用； --- Who is knocking at the door? --- It’s me. 2）指代心目中指的人； --- Look! Someone is coming. Who can it be? 3）指代性别不详的婴幼儿； Look at the little baby. It’s so small. 4）在问句中有指示代词作主语时，回答常用it指人. --- Who’s that? Is it Helen? --- Yes, you’re right. It’s Helen.
二、it 作为无人称代词指时间、距离、自然现象及环境、形势等： 1） It’s eight o’clock in the morning. It’s winter now. The weather is cold . 2）It’s only five minutes’ walk from here. 3）It is going to rain. 4）If it’s convenient, I can see you tomorrow.
1. It is time for sth It’s time for harvest.(for sb) to do sth It’s time for us to go to bed.that 从句 It’s time that we went to bed.2. It is /was the first (second---) time that 从句 1) It is the fourth time that he has attempted to escape. 2) It was the second time that I had visited Beijing last year.
3. It +be (is/was/has been) + 时间段+ since 从句 1) It is/has been five years since I began to study English. 2) It was two years since she left school.
4. It +be (was/will be) + 时间段 +before 从句 (过多久后才---) 1) It’ll be half a year before I see you again. 2) It was two months before I returned school.
It 指时间的其他用法三、it可以用作形式主语，常见的句型有：
It is/was + 形容词 + (for sb) to do sth. It isn’t easy for some smoker to quit smoking.
It is/was + 形容词 + of sb to do sth. It’s kind of you to help me to do it.
It + 系动词 + 形容词 + to do sth. It seemed impossible for her to finish the work before six.
It is/was + 形容词/名词 + doing sth. 1) It’s a waste of time waiting here. 2) It’s no use/good waiting here.
It is/was + 形容词 + 从句
It is clear( plain true certain sure obvious---) +that 从句(陈述语气)It is important (necessary---) + that 从句(虚拟语气)1) It is amazing that at my age I am still fit enough to cycle 20 kilometres in an afternoon. 2) It is important that we (should) learn a special skill.6. It is/was + 名词词组 + to do sth It’s a pity to miss the early bus that 从句 It’s a wonder that you could work out the hard problem on your own.one’s turn/duty, pleasure, a pity, great fun, a habit, time, a ruler, a shame, no/a wonder，a suggestion/my wish(虚拟语气)7. It is/was/has been + 过去分词+ that从句 1) It has been found that some people have to try several times before they finally stop smoking. 2) It is suggested that some measures (should) be taken to stop pollution.
8. It took/takes sb some time to do sth. It takes him fifteen minutes to go to school every day.
9. It cost/costs sb some money to do sth. It cost me 100 yuan to buy this coat.
10. It + 动词 + 主语从句 It doesn’t matter whether he comes or not.四、It作形式宾语，代替后面的真正宾语(不定式，动名词和从句). 常见的句型结构：主语+谓语+ it + adj./n + to do/doing/从句。 常用于此句型的动词有：make, think, feel, find, consider等。 1). Your mother told me that you have started smoking and that you are finding it difficult to give up. 2). They make it clear to the public that they are doing an important and necessary job. 3). He feels it his duty to take care of her.
五、it可用来引导强调句型。 强调句型：It is/was + 被强调部分 + that/who + 其它成分 1. It was I that/who sent the boy to the hospital. 2. Was it during the war that the boy’s father died? 3. Why was it that the young man was put into the prison?-六、在短语ask for(请求), depend on(依靠), answer for(负责，担保), insist on(坚持), see to(确保，负责) 等后接that 从句时，必须用形式宾语it. 1). She will answer for it that he passes the exam. 2). Would you see to it that the children get good rest after the exercises?
七、某些及物动词如：like, love, enjoy, prefer, hate, appreciate 等之后若没有宾语，而直接跟上if/when 的从句时，要在从句前加上it. 1). I would appreciate it if you help me with the problem. 2). I like it where the river is clear and the sky is blue. 3). I hate it when someone is laughing and speaking with food in her/his mouth.
I don’t mind her criticizing me, but _____ is how she does it that I object to. A. it B. that C. this D. which
____ worries me the way he keeps changing his mind. A. This B. That C. What D. It
If I can help_____, I don’t like working late into the night. A. so B. that C. it D. them
It remains______ whether Jim’ll be fit enough to plat in the finals. A. see B. to be seen C. seeing D. to see
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. it ExercisesADCBB