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it的用法“It”用法及其句型和固定搭配，是英语语法的重点、难点，又是近几年考试的热点，因此在复习中应给予足够的重视。
It 句型归纳：1． It is ＋adj．(＋for sb．／sth．) ＋ to do sth．用于此句型的形容词有：easy， hard， difficult，possible， important，impossible， necessary， good， bad， exciting， interesting， surprising 等。
如： It is necessary to change your job．It was very hard for them to walk such a long way in the snow．2．It is ＋n．(＋for sb．／sth．) ＋ to do sth．用于此句型的名词有： pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。
如：It is a pity for you to have missed such a wonderful play．It is bad manners for the young to take up the seats for the old．3．It is ＋adj．＋of sb．＋to do sth．此句型中的形容词主要描述某人的品德、特征。
能用于该句型的形容词有：kind, nice, wise, silly, polite, impolite, friendly, foolish, clever等。
如：How silly it was of you to give up such a good chance！It is friendly of the family to try to make me feel at home in their house．4．It is ＋adj．（＋n．）＋doing sth．此句型中的形容词和名词常见的有：no／little use, no／much good, useless 等。
It 句型归纳1．It is ＋adj．(＋for sb．／sth．) ＋to do sth．用于此句型的形容词有：easy，hard，difficult，possible，important，impossible，necessary，good，bad，exciting，interesting，surprising等。
如：It is necessary to change your job．It was very hard for them to walk such a long way inthe snow．2．It is ＋n．(＋for sb．／sth．) ＋to do sth．用于此句型的名词有：pity, shame, pleasure, one’s duty, one’sjob, fun, joy, good manners, bad manners等。
如：It is a pity for you to have missed such a wonderfulplay．It is bad manners for the young to take up the seatsfor the old．3．It is ＋adj．＋of sb．＋to do sth．此句型中的形容词主要描述某人的品德、特征。
能用于该句型的形容词有：kind, nice, wise,silly, polite, impolite, friendly, foolish, clever等。
如：How silly it was of you to give up such a goodchance！It is friendly of the family to try to make me feelat home in their house．4．It is ＋adj．（＋n．）＋doing sth．此句型中的形容词和名词常见的有：no／little use, no／much good,useless等。
It句型归纳总结I． It作形式主的句型①It + be + adj (kind , wise , careless, clever⋯) + of sb to do sthEg: It is wise of him to make such a decision.他做出的决定是明智的。
②It + be + adj(easy , safe , common , normal⋯) + for sb to do sth句型中adj 若 important, necessary, natural, possible, strange, vital, essential 等可改从句 ,从句用.Eg: It’svery dangerous for children to play with fire.It is important for us to learn English well.(= It is important that we (should) learn English well.)should+原形。
③It + be +V-ed( reported, believed, said, suggested ⋯ ) + that 从句句型中：⑴若 V-ed reported, believed, said 等常“据道”，“据”，“据”。
⑵若 V-ed suggested, ordered, demanded, insisted 等表示“建”,“命令”的，从句要用虚气 (should)+原形。
Eg: It is suggested that the book (should) be revised.It’s said that Tom has been back from abroad. (=Tom is said to have been back from abroad.)④It + be + n (a pity, a shame, a fact , good news ⋯ ) + that 从句 :?句型中，从句一般用(should) + 原形，表示出乎意料，常＂竟然＂。
It 引导的句型结构1． It + be + adj. ( for sb.) to do sth. “（对某人来说），做某事很…”. It is important for us to learn English well. 对我们来说，学好英语很重要。
Exercises对璐西来说，解这道数学题很容易。
对安娜来说，这个包太沉了。
2．It + be + adj. + of sb. to do sth. “某人做某事很…”. It was foolish of her to waste money on such clothes.她真蠢，把钱都花在买这样的衣服上。
Exercises你人真好，帮我这个忙。
他真残忍，杀死了那么多无辜的人。
你真聪明，能想出这么一个好办法。
3. It + be + adj./n. + that …“. It is very important that we (should) pay more attention to spoken English.重要的是，我们应该更加重视英语口语。
Exercises沮丧的是，他并没有通过考试。
激动的是，这支球队最终赢得了比赛的胜利。
4．It + be + n. +. It is no use crying over the spilt milk. 覆水难收。
Exercises吸烟没有任何益处。
5． It + be + some time + since…“从…时起已有多长时间”It is ten years since he had left China. 他离开中国已经十年了。
6． It + be + (said, reported, believed…) + that….It is said that he will leave for Beijing on Tuesday.7． It + be + time + ( that )…. 是该做什么的时候了。
1.“It is time for……”表⽰“是……时候了”。
句中介词for后接名词或代词作宾语。
如：It’s time for school.是上学的时候了。
2.“It’s time to do sth.”表⽰“是做某事的时候了”。
此句常与上句替换使⽤。
如：It is time for us to have lunch.=It is time for our lunch.是我们吃午饭的时候了。
3.在“It seems……”句中，seem是不及物动词，常作系动词⽤，有“好像、似乎”的意思，后⾯可跟动词不定式、形容词作表语，也可跟从句。
如：It seemed that nobody knew anything about the matter.看来没有⼈知道这件事。
4.“It’s one’s turn to do sth.” 表⽰“轮到某⼈做某事了”。
如：It’s your turn to play ping-pong.该轮到你打乒乓球了。
5.“It is+形容词+to do sth.”表⽰“做某事怎么样”。
其中it作形式主语，代替后⾯的不定式to do sth.(真正主语)。
如：It is easy to speak English. 说英语很容易。
6.“It is+形容词+for sb.+to do sth.”意为“对某⼈来说做某事怎么样”。
这种结构中的形容词常常是easy，difficult，hard，important，necessary，quick等，这些形容词常与事物的特征有关。
如：It is quite difficult for us to find out who broke the windows.对我们来说，查明是谁打破了窗户是相当难的。
7.“It is+形容词+of sb.+to do sth.”表⽰“某⼈做某事怎样”。
这种结构中的形容词常常是：good，kind，nice，wrong，clever等，这些形容词常与⼈的性格特点有关。
It常用句型大盘点“It” 用法及其句型和固定搭配，是英语语法的重点、难点，又是近几年考试的热点，因此在复习中应给予足够的重视。
现将it用法归纳如下：1. It is + 被强调部分+ that ...【说明】该句型是强调句型。
将被强调的部分放在前面，其它部分置于that之后。
被强调部分可以是主语、宾语、表语或状语。
强调的主语如果是人，that可以换成who。
如果把这种句型结构It is / was... that /who... 划掉后，应该是一个完整无缺的句子。
这也是判断强调句型与其它从句的方法。
【举例】It was I who / that met Jim in the street.(强调主语)It was in the street that I met Jim. (强调状语)It was Jim who / that I met in the street. (强调宾语)It is a chief engineer that he becomes now. 他现在担任的是总工程师（强调表语）2. It is not until + 被强调部分+ that ...【说明】该句型也是强调句型。
主要用于强凋时间状语，译成汉语“直到……才……”，可以说是not until ... 的强调形式。
【举例】It was not until I got home that my mother went to bed.= M y mother didn’t go to bed until I got home.=Not until I got home did my mother go to bed.3. It’s no use / good doing sth. 做某事没有用。
【举例】I t’s no use/good crying over spilt milk.= Crying over spilt milk is no use / good.4. It’s a waste of time doing sth. 浪费时间做某事。
英语语法it常用句型20种1. It is + 被强调部分+ that ...该句型是强调句型。
将被强调的部分放在前面，其它部分置于that之后，被强调部分可以是主语，宾语，表语或状语，强调的主语如果是人，that可以由who换用。
如果把这种句型结构划掉后，应该是一个完整无缺的句子；这也是判断强调句型与其它从句的方法。
It was about 600 years ago that the first clock with a face and an hour hand was made.It was they that (who ) cleaned the classroom yesterday.It was in the street that I met her father.2. It is not until + 被强调部分+ that ...该句型也是强调句型。
主要用于强凋时间状语，译成汉语＂直到．．．才．．．＂，可以说是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.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 引导的主语从句，常译为＂清楚（显然，真的，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.4. It is important ( necessary，right，strange，natural...) that ...该句型和上一个同属一个句型；由于主句中的形容词不同，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词。
It is important that we (should) learn English well.It is necessary that he (should) remember these words.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 引导的主语从句；该结构常译为＂据说（据报道，据悉．．．）＂。
It is said that he has come to Beijing.It is reported that another earth satellite has been put into orbit.6. It is suggested ( ordered ... ) 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.7. It is a pity ( a shame ... ) that ...该句型中，that后的从句一般用虚拟语气（should + 动词原形），should可省去．表示出乎意料，常译为＂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.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！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.9. It is the first ( second ... ) time that ...该句型要和上一个句型区别开来，该句型中的that 从句不用虚拟语气，而用完成时态，。
至于用什么完成时态，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；如果是一般过去时，后面从句则用过去完成时态，该结构中that 可以省去；it有时用this 替换．常译为＂是第一（二）．．．次．．．＂。
It is the first time I have been here.= This is the first time I have been here.10. It is .... since ...。
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，主句中是时间作表语，其时态是现在时或完成时，since 引导的从句通常是一般过去时态，而且是瞬间动词。
如果主句是一般过去时，从句则用过去完成时。
It is ( has been ) 5 years since his father died.11. It is ... when ...。
该句型中的when 引导的是一个时间状语从句，主句中的it 指时间，表语由具体的时间充当，常译为＂当．．．的时候，是．．．＂It was 5 o'clock when he came here.12. It be ... before ...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，not long ，3 days ， 2 weeks 等表示时间段的词或短语，常译为＂．．．之后．．．＂。
It was 3 days before he went to Beijing.It will be not long before he finishes his job.13. 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 happened ( so happened ) that he met his teacher in the street. 碰巧．．.It seems that he will be back in a few days. 看来．．．14. 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．．．＂。
It took thousands of people many years to build the Great Wall.15. 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 )。
It is no good learning English without speaking English.16. It doesn't matter whether ( if ) ...该句型中whether(if) 引导的从句是真正主语，该句型常译为＂不论（是否）．．．没关系．．．。
It doesn't matter if they are old.17. It is kind ( of sb. ) to do sth.该句型中的不定式短语是真正主语，如果不定式的逻辑主语是由of引起，主句中的形容词必须是能表示逻辑主语特征的形容词。
常见的有：bad ，brave ，careless，clever ，cruel ，foolish ，good （好心的），honest ，horrible ，kind ，lazy ，modest ，naughty ，nice（有教养的），polite，rude ，silly ，stupid ，wise ，wrong（错误的）等。
这个句型可以改写为：sb. is kind to do sth. 。
It is kind of you to say so.= You are kind to say so.18. It is necessary ( for sb. ) to do sth.该句型与上一个同属一个句型，如果不定式的逻辑主语是由for引起，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的形容词。
常见的形容词有：① important，necessary，natural ② easy ，safe ，common ，normal ，hard ，difficult ，dangerous ，unusual，rare ，impossible ，pleasant等。
=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.19. It looks ( seems ) as if ...该句型中it无意义，as if 引导一个状语从句。
常译为，＂看起来好象．．．＂如果与事实不相符合，则用虚拟语气。
It looks as if he is ill.（真的病了）It looks as if he were ill. （没有生病）It seemed as if he were dying.20. We think it important to learn a foreign language.该句型中的it 作形式宾语，为了记忆方便我们可称该句型为"6123结构"。
