关于it作人称代词的用法.doc

关于it作人称代词的用法:1. 用于指事物it用作人称代词最基本的用法就是代替前面已提到过的事物，以避免重复：This is my watch, its a Swiss one. 这是我的手表，它是瑞士制的。I cannot find my watch; I must have lost it. 我找不到手表，我一定把它给丢了。2. 用于指动物或婴儿除用于指代事物外，还可指动物或性别不详的婴儿：“Where is the cat?” “Its under the bed.” “猫在哪儿?”“在床下。”They got a baby and it was very lovely. 他们生了个孩子，很可爱。3. 用于上文提到的情况He smokes in bed and I dont like it. 他在床上抽烟，我不喜欢他这样。Her mother kept telling her not to go out at night, but it didnt help. 她母亲老叫她晚上不要出去，但是没用。4. 用于指人it用于指人主要用确定未知人的身份：“Who is it?” “Its me.” “是谁啊?”“是我。”“Listen. Someone is crying.” “Oh, it must be Mary.” “听，有人在哭。”“噢，一定是玛丽。”Someone must have been here. But we have no idea who it was. 一定有人来过，但我们不知道是谁。5. 指人时与he和she的区别当it用于指人时，主要用于确定未知的或者是身份不明的人，若是指已知的或身份明确的人，则应根据情况使用he或she。比较：I hear a knock at the door. It must be the postman. 我听见有人在敲门，一定是邮递员来了。Jim is at the door. He wants to see you. 吉姆在门口，他想见你。A tall man stood up and shook hands with her. It was the general manager. 一个高个子站起来同她握了手，他是总经理。The general manager just called. He told us to wait for him at the gate. 总经理刚来过电话，他叫我们在门口等他。6. 指物时与one的区别两者均可代替前面提到的事物，区别是：it指的是与前面已提到的事物为同一物，此时的it等于“the (this, that, my.)+名词”；而one 指的是与前面已提到的事物为同一类物，此时的one等于“a+名词”。比较：I have a dictionary but Ive lent it to Mary. 我有一本词典，但把它借给玛丽了。I havent a dictionary; can you lend me one? 我没有词典，你能借我一本吗?it用作形式宾语的四个特殊句式:当不定式、动名词、从句等复杂成分用作宾语且其后跟有宾语补足语时，通常会在宾语补足语前使用形式宾语it，而将真正的宾语移至句末，其基本结构为“动词+it+宾语补足语+不定式(动名词或从句)”。如：I find it difficult to do the job well. 我发现做好这件事不容易。I think it best that you should stay here. 我认为你最好住这儿。We think it no use complaining. 我们认为抱怨是没有用的。但是，以下几种形式宾语比较特殊，同学们需引起注意（同时它们也是高考的常考考点）：1. 动词+ it + that-从句。如：I like it that you came. 你来了，我很高兴。I take it (that) he will come on time. 我认为他会准时来的。You can put it that it was arranged before. 你可以说这是以前安排的。Rumor has it that the defence minister will soon resign. 据传闻，国防部长不久就要辞职。说明：能用于此结构的动词不多，常见的有 have, take, put, like 等。2. 动词 + it + when (if)-从句。如：I dislike it when you whistle. 我不爱听你吹口哨。We really appreciate it when she offered to help. 她来帮忙了，我们十分感激。Id prefer it if I didnt have to do so much work. 要是我不必做那么多工作，好就太好了。说明：能用于此结构的动词不多，常见的有 enjoy, hate, love, like, dislike, appreciate, prefer 等。3. 动词 + prep + it + that-从句。如：See to it that youre not late again. 注意千万不要再迟到。Look to it that this doesnt happen again. 注意不要再发生这种事。I cant answer for it that he will come. 我不能保证他会来。You may rely on it that hell come to meet you. 你放心，他会来接你的。说明：能用于此结构的动词不多，常见的有see to, look to, insist on, stick to, depend on, answer for 等。4. 动词 + it + 介词短语+ that-从句。如：I owe it to you that I am still alive. 多亏有你我才仍然活着。I took it for granted that he would help us. 我认为他会帮助我们的。说明：能用于此结构的动词不多，常见的有take it for granted, bring it to sbs attention, owe it to sb 等。it用法完全归纳一、it 作人称代词的用法1. 指事物作为人称代词，it 可以除人以外的一切事物或动物。如：I dropped my watch and it broke. 我把手表掉在地上摔坏了。Its hard work, but I enjoy it. 工作很辛苦，可是我乐意干。“Where is the dog?” “Its in the bedroom. ” “狗在哪?”“在卧室里”。2. 指人it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。如：Is it a boy or a girl? 是男孩还是女孩?There is a knock on the door. It must be the postman. 有人在敲门，一定是邮递员。【说明】在答语中，常用来指本人，如说 Its me。3. 代替某些代词代词 it 还可用于代替指示代词this, that 以及复合不定代词 something, anything, nothing等。如：“Whats this?” “Its a new machine. ” “这是什么?”“是一种新机器”。Nothing is wrong, is it? 没出什么问题，是吗?二、it 作非人称代词的用法1. 基本用法it 作非人称代词的用法，主要用于指时间、距离、价值、天气、气候及温度等自然现象。如：Its too late to go there now. 现在去那儿已经太迟了。It rained all day yesterday. 昨天下了一天的雨。It can get very hot here. 这里有时会很热。2. 用于某些句型Its time for sth. 该做某事了。Its time to do sth. 该做某事的时候了。Its time for sb to do sth. 某人该干某事了。Its (about / high) time + that-从句. 某人该做某事了。(从句谓语用过去式，有时也用“should+动词原形”)Its first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)Its + 时间段 + since-从句. 自从有一段时间了。Its + 时间段 + before-从句. 过多长的时间才三、it用作形式主语1. 基本用法当不定式、动名词、从句等复杂成分用作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it。如：Its very important to remember this. 记住这一点很重要。Its hard work climbing mountains. 爬山是费劲的事。Its unknown when he will come. 他什么时候来还不知道。2. 用作形式主语的的重要句型(1) It + be + adj. for (of) sb to do sth 某人做某事It is hard for him to make up his mind. 他很难下定决心。It was foolish of her to say such a thing. 她说那样的话，真是太蠢了。【说明】介词 of 与 for 的区别是：of 用于指某人的性格、属性、特征等，介词for表示对象，意为“对来说” (from )。(2) It takes sb + 时间段 + to do sth. 某人做某事花了时间It takes years to master a new language. 要花多年的时间才能掌握一门新的语言。【说明】此句型可以有以下多变种变体：It took me an hour to write the letter. =The letter took me an hour (to write). =I took an hour to write the letter. 我写这封信花了一个小时。(3) It is up to sb to do sth. 该由某人做某事Its up to you to to make the choice. 得由你来作选择。(4) it look (seem, appear, happen, occur) that as if 似乎It seemed as though he didnt recognize me. 他似乎没认出我来。It happened that I was out when he called. 他打电话时我碰巧不在家。(5) If it were not for / If it hadnt been for 若不是因为If it were not for their help, we couldnt have got over the difficulties. 要不是他们帮助，这些困难我们不克服不了的。四、it用作形式宾语1. 基本用法当不定式、动名词、从句等复杂成分用作宾语且其后跟有宾语补足语时，通常会在宾语补足语前使用形式宾语，而将真正的宾语移至句末。其基本结构为“动词+it+宾语补足语+不定式(动名词或从句)”。如：I find it difficult to do the job well. 我发现做好这件事不容易。I think it best that you should stay here. 我认为你最好住这儿。We think it no use complaining. 我们认为抱怨是没有用的。2. 用作形式宾语的几个特殊结构(1) 动词+ it + that-从句。如：I like it that you came. 你来了，我很高兴。I take it (that) he will come on time. 我认为他会准时来的。You can put it that it was arranged before. 你可以说这是以前安排的。Rumor has it that the defence minister will soon resign. 据传闻，国防部长不久就要辞职。【说明】能用于此结构的动词不多，常见的有 have, take, put, like 等。(2) 动词 + it + when (if)-从句。如：I dislike it when you whistle. 我不爱听你吹口哨。(from )We really appreciate it when she offered to help. 她来帮忙了，我们十分感激。Id prefer it if I didnt have to do so much work. 要是我不必做那么多工作，好就太好了。【说明】能用于此结构的动词不多，常见的有 e