it的用法.ppt
It的用法
“It” 的用法1.“it”作代词。
“it”可替代物、动物、抽象事物，还可以代天气、时间、距离、环境、温度等。
也可指代上下文提到的事物或某种情况，以及不明身份、性别的人和小婴儿，也可用于电话用语中替代this或that。
E.g. ① It's fine today.(weather)② It's hot today. (temperature)③ It's four o'clock now. (time)④ It's only 200 metres from my home to our school.(distance)⑤ It's noisy outside.(circumstance)⑥ --Who is knocking at the door?--It must be John.(an unknown person)⑦ --Who is it speaking?--It's Mary.(making a phone call)2.“it”作形式主语。
（1）It be +adj. +(for sb.)+ to do sth.此处的adj.为描述事物的形容词。
如：easy, hard, difficult, necessary, possible, impossible, likely, right, wrong, important, etc.E.g. ① It's easy for us to climb the hill.② It's difficult for me to work out the maths problem.(2) It be +adj.+(of sb.)+to do sth.此处的adj.为描述人的形容词。
如：kind, nice, rude, cruel, careful, careless, silly, foolish, stupid, wise, crazy, etc.E.g. ① It's kind of you to help me with this problem.② It's foolish of you to believe in such a person.③ It's wise of you to choose to study abroad.(3). It be + adj.+ doing sth.It's no good/use doing sth.It's (well) worth doing.E.g. ① It's no good arguing with him.② It's no use crying over spilt milk.③ It's no good drinking too much wine.(4) It be +adj./n. +Clause.It's a pity that…It's a fact that…(It's) no wonder that…It's obvious that…It's certain that…It's strange/important/necessary that…(要用虚拟语气）(用should+动词原形)It worries/surprises sb. that…It seems/appears that…It turned out that…It (suddenly) occurred to sb. that…It strikes/struck sb. that…It's said/reported/believed… that…It doesn't matter whether…It makes no di fference whether…(5)其它句型。
it用法
三 it作形式宾语
1.动词+ it + 形容词/名词+（ for sb +）to do
think, believe, suppose, consider, feel, make, Keep … + that 从句
The two girls are so alike that strangers find_____ difficult to tell one from the other. A. it B. them C, her D. that
It 用法归纳
一， 指代it
二， 形式it 三，含有it的句型 四，强调it
一，it作代词
1.用来指代上文提到的事物。
The train has arrived.It arrived half an hour ago.
2. 表示时间，天气， 距离，温度等。
1.It was cold yesterday.
•`9.It替代作主语的动名词 It‘s no good/use doing… It's (well)worth doing…
例 It's no use crying over spilt milk.
`10. It takes sb. ... to do sth. “做．．．要花费某人．．．”。
that 后的从句中要用虚拟语气（should + 动词原形。
It is important that we (should) have enough rice. It is necessary that he (should) remember these words.
形式主语
3. It's surprising that… (should)…… …竟然……
It 的 用法(共16张PPT)
Not until I graduated from the university did I see him.
robbed me of near the school last Don’t take it for granted
It was near the school that the man in black robbed me of my mobile phone last year because of my carelessness.
children in poor areas have access Don’t take it for granted
the school last year because of my carelessness.
Who was it that robbed me of my mobile phone near the school last year because of my carelessness.
强调句的特殊疑问句
school because of my carelessness.
When was it that the man in black robbed me of my mobile phone near the school because of my carelessness.
强调句的特殊疑问句
学校规定，考试中作弊的学生将受到严惩。 The school makes it a rule that those
who cheat in the exams will be seriously punished.
it、one、that的用法与区别ppt课件
weather) The quality of iron produced in your factory is better than that in their
• Cook was a strict but good captain, one who took good care of his sailors.
• The water in the well is cleaner than that in the river.
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• VI. it可以替代句中的不定式或从句等, 充当形式主语或形 式宾语。one与that均无此用法。
• The umbrella you bought is cheaper than that I bought. （替代词that在该句中特指“the umbrella I bought”, 以区别“the umbrella you bought”）
.
• II. one与that虽可用来指代同名异物, 但 one为泛指, 相当于a／an＋名词; that为特 指, 相当于the ＋名词。所以one所指代的 名词的修饰语一般为 a／an ／some ／any; that所指代的名词的修饰语往往是the ／ this ／that。
.
区别
• I. it／one ／that三者均可用作代词, 指代前面提 到的名词。一般说来, it指代同名同物; one与that 则指代同名异物。
• I have lost my umbrella; I'm looking for it. （该句中it就是指前面的my umbrella）
it用法总结ppt课件
It was 3 days before he went to Beijing. It will be not long before he finishes his job.
8
2）.It is +v-ed +that 从句 ① It is said (reported， learned....) that ...
据说（据报道，据悉．．．）“。 It is said that he has come to Beijing.
②. It is suggested ( ordered /demanded/insisted/commanded... ) that ...
②. It is important ( necessary， right， strange， natural...) that ... that 后的从句中要用虚拟语气（should + 动词原形）， should 可以省去，建议记住该句型中的形容词。 It is important that we (should) learn English well.
It is time that children went to bed.
② It is the first ( second ... ) time that ... “是第一（二）．．．次．．．”。
It is the first time I have been here. = This is the first time I have been here.
It的用法和强调
It is a pity that he is ill. 他生病了，真遗憾！
5. It happens (seems， looks， appears ) that... 该句型中it是 形式主语，that 引导的是主语从句，主句中的happen ， seem等词是不及物动词。
It took thousands of people many years to build the Great Wall.
3. 作形式主语替代ing形式 It is no good (use ) doing sth. 该句型中的真正主语是动名词 短语，主句中的表语可以是no good ， ( not any good ) ， no use ， ( not any use )。
在①中的形容词作表语可以用从句改写， 如：
It is important for her to come to the party. = It is important that she (should ) come to the party.
2.It takes sb. ... to do sth. 该句型中的不定式是真正的主语， it是形式主语，句型中的直接宾语是时间，常译为＂做…… 要花费某人……＂。
②It is suggested ( ordered /demanded/insisted/commanded... ) that ... 该句型和上一个同属一个句型，主句中的过去分词是表 示请求，建议，命令等词时，that 后的从句要用虚拟语气 （should + 动词原形），should 可以省；常译为＂据建议；有 命令．．．） It is suggested that the meeting ( should ) be put off. It was ordered that we ( should ) arrive there in two hours.
it的用法
it的用法(1)it作无人称代词：it作无人称代词表示自然现象、气候、时间、距离等。
it是形式主语没有词汇意义。
如：1)It is very cold today．(气候)2)It is three o'clock．(时间)3)It is along way from here．(距离)(2)it作人称代词：it作人称代词时，用来代替上下文中提到的事或物，有时可代替整个句子的内容。
(3)his(was)+形容词十不定式(to do)，it为形式主语，不定式短语为真正主语。
(过去分词)(4)his+{形容词}+that(what，how，whether．．．)，it为形式主语，that 引导的为主语从句。
(名词)(5)It+不及物谓语动词+that引导的主语从句。
这些动词有：seem，appear，turn out，follow，happen等。
(6)It may well be that引导的主语从句。
(7)it作形式宾语：1)某些及物动词+it+形容词十不定式；2)某些及物动词+it+形容词+that...在上述两种句型中，it是形式宾语，真正的宾语是不定式短语，或that 引导的宾语从句。
(8)it用于强调句型：It is(was)十被强调的成分+that(which，who)强调句型是简单句，可以用来强调句中主语、宾语和状语，但不能强调定语和谓语。
在这种句型中把his．．．that去掉，句子仍成立。
代词在句中分析与翻译的实例1．All the various transitions from one form of motion into another are governed by one ofthe fundamental laws of nature，that of the eternity of matter and its motion．运动可以由一种形式变为另一种形式，所有运动形式的变换都取决于一个基本的自然规律，即物质及其运动永恒性的规律。
高考英语二轮复习之必备语法it的用法、常用句型(共28张PPT)
【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。
四、it用在一些固定表达中 As someone puts it, ... 像某人所说的那样 Please see to it that ... 请务必…… When it comes to ... 当提到……时 It looks / seems as if ... 看起来好像…… It’s time for sth. 该做某事了 It’s time (for sb.) to do sth. (某人)该干某事了 It is (high) time that ... (早就)该……
Mary. I haven’t a dictionary; can you lend me one?
1. how would you like ___D__ if you were watching your favorite tv program and someone came into the room and just shut it off without as you? a. them b. one c. those d. it
五、it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 +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”。 e.g. I have a dictionary but I’ve lent it to
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5. It is said (reported， learned....) that ... ， 该句型中的it 仍是形式主语，真正主语是that 该句型中的 仍是形式主语，真正主语是 引导的主语从句；该结构常译为＂据说（ 引导的主语从句；该结构常译为＂据说（据报 据悉．．．）＂。 道，据悉．．．）＂。 It is said that he has come to Beijing. It is reported that another earth satellite has been put into orbit.
2.2.指时间 指时间: 指时间 It was nearly midnight when she came back. 2.3.指环境 指环境: 指环境 It was very quiet in the café. 2.4.指距离： 指距离： 指距离 It is half an hour’s walk to the city centre. 3.it的其他用法 的其他用法 3.1.表示谁在做某事的句子： 表示谁在做某事的句子： 表示谁在做某事的句子 Who is it? ---It’s me. 3.2.用来泛指某件事： 用来泛指某件事： 用来泛指某件事 It is a shame, isn’t it?
11. It be ... when ... 引导的是一个时间状语从句， 该句型中的 when 引导的是一个时间状语从句，主句 指时间，表语由具体的时间充当，常译为＂ 中的 it 指时间，表语由具体的时间充当，常译为＂ ．．．的时候 的时候， 当．．．的时候，是．．．＂ It was 5 o’clock when he came here. 12. It be ... before ... 指时间， 该句型主句中的 it 指时间， 主句中的时态常是将来一 般时或过去时两种时态．主句中的表语多是long， 般时或过去时两种时态．主句中的表语多是 ， not long ， 3 days ， 2 weeks 等表示时间段的词或 短语，常译为＂．．．之后．．．＂。 ＂．．．之后 短语，常译为＂．．．之后．．．＂。 It was 3 days before he went to Beijing. It will be not long before he finishes his job.
2. It is not until + 被强调部分 + that ... 该句型也是强调句型。 该句型也是强调句型。主要用于强凋时间状 译成汉语＂直到．．． ．．．＂，可 ．．．才 语，译成汉语＂直到．．．才．．．＂，可 的强调形式。 以说是 not ... until ... 的强调形式。 It was not until she took off her dark glasses that I realized she was a famous film star. = Not until she took off her dark glasses 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.
10. It is .... since ...。 。 该句型主要用作处理瞬间动词的完成时， 该句型主要用作处理瞬间动词的完成时，又 要和表示一段时间的时间状语连用的问题， 要和表示一段时间的时间状语连用的问题， 主句中是时间作表语， 主句中是时间作表语，其时态是现在时或完 成时， 成时，since 引导的从句通常是一般过去时 而且是瞬间动词。 态，而且是瞬间动词。如果主句是一般过去 从句则用过去完成时。 时，从句则用过去完成时。 It is ( has been ) 5 years since his father died. It is three years since I came to live here.
3. It is clear ( obvious， true， possible， ， ， ， certain....) that ..... 该句型中it 是形式主语，真正的主语是that 引 该句型中 是形式主语，真正的主语是 导的主语从句，常译为＂清楚（显然，真的， 导的主语从句，常译为＂清楚（显然，真的， 肯定．．．）＂ 肯定．．．）＂ 是主语从句最常见的一种结 构。 It is very clear that he’s round and tall like a tree. = That he’s round and tall like a tree is very clear.
强调句型 It + be +被强调部分 + that/who从句 被强调部分 从句 I met Tom in the park yesterday. 1) It was I who met Tom in the park yesterday. 2) It was Tom who I met in the park yesterday. 3) It was in the park that I met Tom yesterday. 4) It was yesterday that I met Tom in the park. It was five o’clock _________I got home. when It was at five o’clock_______ I got home. that
9. It is the first ( second ... ) time that ... 该句型要和上一个句型区别开来， 该句型要和上一个句型区别开来，该句型中的 that 从句不用虚拟语气，而用完成时态。至于用 从句不用虚拟语气，而用完成时态。 什么完成时态，由主句的谓语动词的时态决定。 什么完成时态，由主句的谓语动词的时态决定。 如果是一般现在时，后面从句用现在完成时态； 如果是一般现在时，后面从句用现在完成时态； 如果是一般过去时，后面从句则用过去完成时态， 如果是一般过去时，后面从句则用过去完成时态， 可以省去； 有时用 替换． 该结构中 that 可以省去；it有时用 this 替换．常 译为＂是第一（ 译为＂是第一（二）……次……＂。 次 ＂。 It is the first time I have been here. = This is the first time I have been here.
1)He didn’t come because he was ill. It was because he was ill that he didn’t come. 2) She didn’t go to bed until her father came back. It was until her father came back that she didn’t go to bed. (wrong) It was not until her father came back that she went to bed. Not until her father came back did she go to bed.
4. It is important ( necessary， right， strange， ， ， ， natural...) that ... 该句型和上一个同属一个句型； 该句型和上一个同属一个句型；由于主句中的形容词 不同， 后的从句中要用虚拟语气（ 不同，that 后的从句中要用虚拟语气（should + 动词 原形）， ），should 可以省去，建议记住该句型中的形容 可以省去， 原形）， 词。 It is important that we (should) learn English well. It is necessary that he (should) remember these words.
ห้องสมุดไป่ตู้
7. It is a pity ( a shame ... ) that ... 该句型中， 该句型中，that后的从句一般用虚拟语气 后的从句一般用虚拟语气 动词原形）， ），should可省去．表示 可省去． （should + 动词原形）， 可省去 出乎意料，常译为＂竟然＂。没有这种意义时， ＂。没有这种意义时 出乎意料，常译为＂竟然＂。没有这种意义时， 则不用虚拟语气。 则不用虚拟语气。 It is a pity that such a thing ( should ) happen in your class. 这种事竟然发生在你们班上，真是遗憾！ 这种事竟然发生在你们班上，真是遗憾！ It is a pity that he is ill. 他生病了，真遗憾！ 他生病了，真遗憾！
8. It is time ( about time ，high time ) that ... 该句型中that 后的从句应该用虚拟语气，值 后的从句应该用虚拟语气， 该句型中 得注意的是① 常用过去时态表示虚拟． 得注意的是① 常用过去时态表示虚拟．② 有时也用should + 动词原形，should 不能 动词原形， 有时也用 常译为＂ 正是）．．． ）．．．的时 省，常译为＂是（正是）．．．的时 侯．．．＂ It is time that children should go to bed. = It is time that children went to bed.
㈠ 1.it作人称代词 作人称代词
1.1.it的最基本用法是作人称代词，主要指刚提到的事 的最基本用法是作人称代词，主要指刚提到的事 的最基本用法是作人称代词 以避免重复: 物，以避免重复 Ningbo is a beautiful city, isn’t it? 1.2.也可以指动物或婴儿 未知性别的婴儿或孩子 也可以指动物或婴儿(未知性别的婴儿或孩子 也可以指动物或婴儿 未知性别的婴儿或孩子): Is this your dog？No, it isn’t. ？