高中英语课件-it的用法
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高中英语语法总结——强调句、It的用法、省略和插入语一、强调句(一)强调句句型1、陈述句的强调句型:It is/ was + 被强调部分(通常是主语、宾语或状语)+ that/ who(当强调主语且主语指人)+ 其它部分。
e.g. It was yesterday that he met Li Ping.2、一般疑问句的强调句型:同上,只是把is/ was提到it前面。
e.g. Was it yesterday that he met Li Ping?3、特殊疑问句的强调句型:被强调部分(通常是疑问代词或疑问副词)+ is/ was + it + that/ who + 其它部分?e.g. When and where was it that you were born?4、强调句例句:针对I met Li Ming at the railway station yesterday.句子进行强调。
强调主语:It was I that (who) met Li Ming at the railway station yesterday.强调宾语:It was Li Ming that I met at the railway station yesterday.强调地点状语:It was at the railway station that I met Li Ming yesterday.强调时间状语:It was yesterday that I met Li Ming at the railway station.5、注意:构成强调句的it本身没有词义;强调句中的连接词一般只用that, who,即使在强调时间状语和地点状语时也如此,that, who不可省略;强调句中的时态只用两种,一般现在时和一般过去时。
原句谓语动词是一般过去时、过去完成时和过去进行时,用It was …,其余的时态用It is …。
“It”用法及其句型和固定搭配讲解"It" 用法及其句型和固定搭配,是高中英语语法的重点、难点,又是近几年高考的热点,因此应给予充分的重视,现将it用法归纳如下:一、It用作实词表达以下概念:指代前文提到的事物,前文中的this, that;替代前文中的内容;指代一位性别不明的小孩或未知的人;指代未指明但谈话双方都知道的那件事;指代时间、天气、气候、距离等自然现象……二、It用作形式主语替代作主语的从句、动词不定式、动名词,而把真正作主语的从句、动词不定式、动名词置于句尾。
It 作形式主语的常见句型:1. 代作主语的动词不定式,其句型为(1) It be adj. (for sb.) to do sth.此处adj. 通常为描述事件的形容词:easy, difficult, hard, necessary, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impolite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous…例It is illegal (for a teenager) to drive a car without a license.(2) It be adj. of sb. to do sth.此处adj. 通常为描述人的形容词:kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, foolish, stupid, clever, wise, crazy.例It's kind of you to help me with the problem.(3) It替代作主语的动名词的常见句型It's no good/use doing…It's (well)worth doing…It's (well)worth one's while doing/to do…It's (well)worth while doing/ to do例It's no use crying over spilt milk.2. It替代作主语的从句常见句型(1) It is + noun +从句例It is no secret that the president wants to have a second term at office.(2) It is adj. +clauseIt's surprising that… (should)………竟然……It's a pity/shame that…(should)………竟然……例It's important that you should apologize to her for your rudeness.(=It's of much importance that you should apologize to her for your rudeness.)(3) It verb sb. + clause= It is v-ing + clauseIt+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze/bother/concern/frighten/please/anger sb. that…例It worried me that she drove so fast.(= It was worrying that she drove so fast.)(4) It verb (to sb.) that…= sb/sth verb to do(verb = appear, seem, come about, emerge, follow, chance, happen, occur, transpire, turn out , work out)例It (so) happened/chanced that they were out.(= They happened/chanced to be out.)(5) It is v-ed that…=sb/sth is to do(verb=say, report, think, believe, hope, expect, agree, accept, decide, determine, intend, plan, understand, know)例It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.)(6) It is v-ed that … (should)…(verb=demand, request, require, order, suggest, advise, recommend例It is suggested that they should begin with the third question.三、It作主语的句型1. It takes sb. … to do…(=sb takes…to do…)某人用多长时间做某事例It took the men a week to mend our roof.(= The men took a week to mend our roof.)2. It's (just)(un)like sb. to do…(不)像某人做某事的风格例It was (just) like him to think of helping us.3. It's (about/high) time that… should /v-ed…是该做某事的时候了例It's(about/high) time that we should take action.4. It's the x-th time (that) … have v-ed…第几次做某事了例It's the third time that he has failed the driving test.5. It is/has been… since …continuous v-ed(延续性动词) 某动作已有多长时间不发生了例It's 10 years that he lived here6. It was(not)… before…过(不)了多长时间某动作发生了例It was not long before they arrived.四、It 作形式宾语用来替代作宾语的从句、动词不定式、动名词,而把真正作宾语的从句、动词不定式、动名词置于句尾。
高考英语It的用法It是高考英语中一个极其重要的词,其用法多样,在不同的语境中具有不同的意义。
下面我们将从it的用法、句型和固定搭配三个方面进行讲解。
一、it用作实词1、表示时间、天气、距离、温度等自然现象。
例如:It is Monday today.今天是星期一。
It is raining outside.外面正在下雨。
It is 5 kilometers away from here.距离这儿有5公里远。
2、表示观点、看法、态度等主观想法。
例如:I think it is a good idea.我认为这是一个好主意。
We think it is important to learn English well.我们认为学好英语很重要。
二、it用作形式主语当不定式、动名词或从句作主语时,为了保持句子结构平衡,避免头重脚轻,常用it作形式主语,代替不定式、动名词或从句,而把真正的主语放在句尾。
例如:It is important to learn English well.学好英语很重要。
It took me an hour to finish the homework.我花了一个小时完成作业。
三、it用作形式宾语当不定式、动名词或从句作宾语时,为了保持句子结构平衡,避免头重脚轻,常用it作形式宾语,代替不定式、动名词或从句,而把真正的宾语放在句尾。
例如:I think it is important to learn English well.我认为学好英语很重要。
He found it hard to learn English well.他发现学好英语很难。
四、it用于强调句型中强调句型是英语中一个重要的句型,用于突出强调某个成分,特别是主语、宾语和状语等。
在强调句型中,it没有实际意义,只是起到引导作用。
例如:It is I who am the best student in my class.我是班里最好的学生。
高考英语中it用法浅析“it”用法及其句型和固定搭配是高中英语语法的重点和难点,也是近几年高考的热点。
它的用法极其广泛、灵活,既可以作人称代词,也可以作非人称代词;既可以充当形式主语和形式宾语,也可以用于强调结构中,构成强调句;它还常常用在某些动词或特殊词类之后,构成习惯用语。
下面就其在高中英语中的使用重点及难点通过例句加以总结:1.作人称代词1)指人,主要用来确定未知人的身份,也可以指性别不详的婴儿。
---Who is it? ---It’s me.---谁呀?---是我。
It’s a lovely baby. Is it a boy or a girl?是个可爱的婴儿,男孩还是女孩?2)指除了人以外的一切动物和事物,是第三人称单数(中性)。
It’s a pet dog. 它是只宠物狗。
I love swimming. It keeps me fit.我喜欢游泳,它让我保持健康。
3)表示推断(不管个数有多少)--- Who is making such a noise? --- It must be children.---谁这么吵?---一定是孩子们。
4)代替指示代词和不定代词Nothing is wrong, isn’t it? 没出什么问题,是吗?1.用作非人称代词,表示时间、天气、气候、距离、温度、地点、金钱等,在句中做主语。
It is six miles to the nearest hospital from here. 从这儿到最近的医院有6英里。
3.充当形式主语,本身无意义,只起一种先行引导的作用,后面的真正主语通常是不定式结构、-ing分词结构、或名词性从句。
1)典型句型:It be(is\was\will be )+ n.\adj.\participle + doingsth\ to do sth\that-clauseIt is difficult to translate this article.翻译这篇文章很难。