it用法总结(高三总复习)

1、TWrrrt- e*w.-u-、此的用法>W r .如、心> 7一、it作人称代词的用法 1.指事物作为人称代词，汁可以除人以外的一切事 物或动物。如： I dropped my watch and it broke.我 把手表鼻在地上摔坏了。 Its hard work, but I enjoy 汁.工作很 辛苦，可是我乐意干。 aWhere is the dog?" ''Its in the bedroom."'喻在哪?""在卧室重”。 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

2、 It a boy or a girl?是男孩还是女孩？ There is a knock on the door. It must bethe postman.有人在敲门，一定是邮递员。7【说明】在答语中，常用来指本人，如 说 It's me o 3.代替某些代词代词计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： “ What's this?11 uIt*s a new machine.""这是什么？"是一种新机器”。 Nothing is wrong, is it?没

3、出什么问题, 是吗？二、it作非人称代词的用法1基本用法汁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。1. It is Friday today. date2. Zf was very cold last Monday, weather3. It is about 8:30 now. time4. It is about 25km from Linquan to Fuyang 5. It lies in the south of Anhui. plQCe6. It is 40° C I You got a high fever!temperature

4、2.用于某些句型It is time for breakfast.It is time to have breakfast.It is time for us to have breakfast. Its (about / high) time + that从句某人该做某事了。以旬谓语用迸去式，有日寸也甬“should+茹词療三、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 百末，而隹句首使庙形式主语it。如I： Itfs very important to remember this i己住这 _点很重要。 Its ha

5、rd work climbing mountains.爬山是费劲的事。5、'' 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)汁作形式主语替代不定式箱成” It + be + adj. for (of) sb to do sthM 某人做某v I I w * - < *; * * .“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.女也说另B 样的话，真是太蠢了。/Tip介词of

6、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”*2)1t is V-< . 4Asd + thort It is said (reported, learned) + that.It is said that he has come to Beijing. It is suggested ( ordered, demanded, insisted, commanded) + that .从句中的过去分词是表示请求，建议，命令等词 时，十ha十后的从句要用虚拟语气(should + V原 形).Should可以省略。译为“据捷议；有命令1+

7、is suggested that the meeting (should) be put off.3) If is a pity (a shame) that.IIThat后的从句一般用虚拟语气(should+V原形)， should可以省略.表示出乎意料，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. (4) 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 l

8、anguage要 花多年的时间才能掌握一门新的语言。【Tip】此句型可以有以下多变种变体：It took me an hour to write the letter. ' f * *二The letter took me an hour （to wr论）. =1 took an hour to write the letter.(5) It is up to sb to do sth.该由某人做某事 Ifs up to you to to make the choice得由你来 作选疼。(6) it look (seem, appear, happen, occur) that as

9、 if.似乎. It seemed as though he didnft recognize me. 他似乎没认岀我来。' It happened that I was out when he called他 打电奋时我碰巧不在家。(7) If it were not for. / If it hadn't beenfor.若木是曲为. If it were not for their help, we couldnft have got over the difficulties.製木是他们帮If，这 迤困难我们不克服不了的。1. 基本用法当不定式、动名词、从句等复杂成分用

10、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）"o女口： I find 汁 chfficult 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： I like it that you came

11、.你来了，我很高兴。 I take it (that) he will come on time.我认为他会准时来商。 You can put it 十ha十 it was arranged before你 可以说彘以前安排的。 Rumor has it iiicrt the defence minister willsoon resign.据传闻，国防部k不头就曩咅辛职。【说明】能用于此结构的动词不多，常见的有have, take, put, like(务 动词+汁+ when (if)-从句。如： I aislike it when you whistle.我不爱听你吹口哨o We rea

12、lly appreciate it when she offered to help.她乗帮it了,我们十分感激。 I'd prefer it if I didn't have to do so much work.要是我不必做那么多工作，好就太好了。【觇明】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I： . 严,- *： :q .»* y < See to it that youre not late ag

13、ain.注意千万 不要再迟到。 Look to it that this doesn't happen again注意 不要再发生这种事。 You may rely on it that he'll come to meet you. 你放心，他会来接你的。 I can't oxsNzr for it that he will come.我不能 保证他会来。说明】能用于此结构的动词不多，常见的有see Ipok to, insist on, stick to, depend on, answer for 等。-(4)动词+汁+介词短语+ that-从句。如： I owe

14、 it to you that I am still alive多亏有你我才仍然活着。、一 I took it for granted that he would help us.我认为他会帮助我们的。 .机 、 st *，.八.|!上.lr 1 .甲【说明】能用于此结构的动词不多，常见衍Wtake 计 for granted, bring it <o sb's attention, owe it to sb 等。五、用于强调句型中1) It + be+被强调部分 + that/who (a person)从句I met Tom in the park yesterday.1)

15、It was I who met Tom in the park yesterday.2) It was Tom who I met in the park yesterday.X 眉/3) It was in the park that I met Tom yesterday4) It was yesterday that I met Tom in the park2) It is not until + 被强调的部分 + that.该句型也是强调句型，主要用于强调时间状语， 译成“直到.才"，可以说是not., until.的强 调形式。It was not until she

16、took off her dark glasses that I realized she was a famous film star.=Not until she took off her dark classes did I realize she was a famous film star.=I didn t realize she was a famous film star until she took off her dark glasses.六、it常用的固定搭配1. make if |Wflllil '1）在口语当中相当于succeed.表示：成功、做到、 说定、赶

17、上、及时到达如： Ifs hard to make it to the top in show business.、2）在口语中相当于fix the date for,表示"约定 好时间” 如：Shall we meet next week?/OK. We just make 计 next Saturday.2. tpke|it/十hings. easy|B|l-i，相当于Don't worry.用来劝告别人，表示"不要慌, 别短心，” Take 汁 easy! He will do it well.3. It all depends/that all depend

18、s 在口语中， 相当于汁hasn什been decided yet,表示"那 得看情况.还没有定下来”/Are you going to the countryside for holiday?It/That all depends.4. It's up to sb.在口语中，相当于it's decided by sb.表示“由决定，由.负责,取决于.”Shall we go out for dinner?/It up to you.Its time后的从句用虚拟语气一、基本用法 省略），其意为“（早）该干某事了”:I think It's time you

19、went to bed.我想你该睡觉了。 It's time we went were going, should go.我彳门该走 T7I'm getting tired It's time we went home 我累 了 ， 我们该回家了。L think its time thev were taught a less on.我想现在 该给他们二点教训了。It's time you looked ahead and made plans for your retirement.是你为以后想一想并对退徐后的生洛 做由安排P勺时候了 O二、同义表达该是孩子们

20、上床的时间了。 It's time the kids were in bed.I=Itfs time for the kids to be in bed.工十 is time that the children went to bed. =It is high time that the children should gQ to bed. IM & 、卩一J 1 二* 命 . 4 « it*4 i lit、两点说明 It's high time you bought a new car.你该买辆新车 To I think its high time that

21、 she made up her mind.我 想她该拿定主意了。 It's high time they began to take you seriously.现在 他们应该开始认真对待你了。、(2)与其他的虚拟结构不同,该结构不能在该 = 、用was时而用were：0 It's time I was in bed.我该上床睡了。(不用were)型剋中I M4 I . J A >丄“ ，曲 £十:尸7自豪等谿絵駅空左柱:能存剤居立曲划玮;划:烹- X"'噺 A*K> S»<*w * .f K二F辽7工丈;屮 '

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