特殊句式---It用法看过来.doc

It 用法看过来it 是中性的第三人称单数代词，其主格和宾格形式相同，在句中可充当主语、宾语和表 语还可做形式主语和宾语，来替代不定式、动词的 ing 和从句★ 人称代词 it 的用法：1) .It 一般指人以外的一切生物或事物有时也指婴儿、小孩或不知性别的人 Where is your car?你的车呢？- It 'sin the garage.在车库里Look! It 's going up that tree.瞧！它正往树上爬呢Her baby is due next month. She hopes it will be a boy.她的孩子该下个月出生她希望会是个男孩Someone is ringing. Who might it be?有人在按门铃，会是谁呢？2) .指已知或正在发生的事实或情况Yes, I was at home on Sunday. What about it? 是的，我星期天就在家，怎么了？Stop it. You are hurting me.住手你弄疼我了If I can help it, I don ' t like working late tion the night. ( 06 全国卷) 如果能行的话，我就不会熬到深夜了。

3) . 指上下文内容Professor Lee gave us a lecture yesterday. It was of great interest.Professor Lee gave us a lecture yesterday, which was of great interest. 昨天李教授给我们做了一个报告，很有趣Yang Liwei was the first Chinese to be sent up into space. It made the Chinese proud. Yang Liwei was the first Chinese to be sent up into space, which made the Chinese proud. 杨利伟是第一个被送入太空的中国人，这使得中国人非常自豪She runs the store very well and I know it.She runs the store very well, which I know.她把这家商店经营的很好，这我清楚★ 非人称代词 it 的用法it 用作无人称的主语，不指物，而表示天气、季节、时间或事物的状态。

1) .指时间It 's early spring, but it 's already very hot. 虽然是初春，但已经很热了What time is it by your watch?你表上几点了？2) . -What 's the weather like today?- It 's very cold today.3) .指距离It's about 15 minutes ' lwk afrom here to the bar. 从这儿到酒吧步行需 15 分钟How far is it from your company to your home ? 从你家到公司有多远？★ 当指示代词用1）用以明确身份 It 's your mother on the phone.是你母亲来的Hello, Peter, it 's Mike here. 喂，彼得，我是迈克Hi, it 'sme.嗨，是我2）指代 this、 thatThis is your plan, isn 'tit?-What's this?-It 's a book.★it 当作形式代词的用法：1） .it 当作形式主语的用法 在英语当中，常用 it 来替代做主语的不定式、 ing 和从句，以保持句子的平衡。

A. 替代不定式It took me three hours to finish the work. 完成这项工作花了我三个小时的时间It 's kind of you to help me. 你能帮我真是太好了It 's hard for us to learn English. 对我们来说学英语有点难 注意： It 's adj for/of sb to do sth. 中 for 和 of 的确定一般是由前面的形容词来定的即前面 的形容词是表示人的性格、品质等特征的词，用 of;其他情况下用forB. 替代 ingIt 'sno use crying over spilt milk. 覆水难收It 'sno good doing it. 做这件事没有好处It 's well worth reading the book. 这本书很值得一读It 's great fun climbing mountains on rainy days. 雨天爬山真有趣注意： ing 一般都是亲自做主语，在下列句式中才用 it 做形式主语It 'sno good/use/well worth doing sth.It 'snot any good/use doing sth.It 'sfun doing sth.C. 替代从句It 'sa fact that the population is still increasing. 人口仍在增长是个事实。

It 's certain that they will come here to see us. 他们要来看我们这是一定的It 's said that he is going abroad with his parents. 据说他要随他的父母去国外It seems that it is going to rain. 天看起来好像要下雨了 常用 it 代替从句的句式有：It 's adj/n that-clause.It 's said/believed/known/reported/supposed/ordered that-clause. 据说/认为/知 /报道/认为/命令…..It seems/appears that-clause. 看起来好像 … ..It turns out that-clause. 结果是 ……It happens that-clause.碰巧 ……It occurs to sb that-clause.It flashes on/upon sb that-clause. 某人想到 ……It strikes sb that-clause. 使某人觉得 ……★ it 用作形式宾语A. find/make/feel/consider/think+ it +adj/n +to do/ving/that-clause. I find it difficult to learn English.我发现学英语很难。

I think it no good doing too many things for children. 我认为过多的包揽孩子的没有好处We make it a rule that everyone shall come to school before 7:30. 我们把每个人在 7：30 之前到校作为一项规章制度B. like/dislike/prefer/hate/love/appreciate +it +when/if-clause.I don 't like it when people speak with their mouths full. 我不喜欢人们嘴里含得满满的说话We would appreciate it if you can come here. 如果你能来这我们讲非常感激★ it 的其他句式A. It 's + 时间段 + since-clause. 时态 主句：一般现在时或现在完成时 从句：一般过去时It's ten years since I worked in No.2 Middle School.It 's several years since Gao Xiumin died.B. It's+ 时间段 + before-clause. 时态 主句：一般将来时 从句：一般现在时主句：一般过去时 从句：一般过去时It will be several years before my son go to college.It wasn 't long before he told me the news.C. It's +时间点 + when-clause. 意义：当做 …… 的时候是几点钟。

It 's about noon when we arrived at the foot of the mountain. 当我们到达山脚下的时候时间大约是正午stIt 's October 1 , 1949 when the People's Republic of China was founded. 中华人民共和国是在 1949 年十月一日成立的D. It 's +时间点 + before-clause. 意义：做 之前是几点钟It 's evening before we got to the village. 我们还没到村子之前就已经是傍晚了E. It 's +被强调的部分 +that/who-clause. 被强调的部分：除谓语之外的其他部分 对谓语动词的强调：do/did/does+动词原形意为“的确…” 注意：被强调的部分为人时， that、 who 都可用，其他均要用 thatIt 'sI that/who saw him in the street yesterday.It 'shim that/who I saw in the street yesterday.It 'sin the street that I saw him yesterday.It 's yesterday that I saw him in the street.It 's not until all the fish died in the river that the villagers began to realize how serious the pollution.试比较一下句子：It 's about noon when we arrived at the foot of the mountain.It 'sat about noon that we arrived at the foot of the mountain.stIt 's October 1 , 1949 when the People's Republic of China was founded.stIt 'son October 1 , 1949 that the People's Republic of China was founded.E. It ' s high/about time that-clause. 该是做某事的时候了。

注意：从句中常用动词的过去式来表虚拟语气It 's time that we had a rest now. 该是我们休息的时候了F. It '/Tshis is the first time that-clau。