it的9种主要句式
it用法及句型归纳
it用法及句型归纳it为人称代词，主格与宾格同形。
该词用法灵活，下面帮助同学们作以归纳。
一、可用来代替指示代词this或that。
例如：—What's this/that? 这/那是什么？—It's a ruler. 这/那是尺子。
二、表示时间、距离、天气、数字等。
例如：1. —What's the time?几点了？—It's ten to ten. 九点五十。
2. —What's one plus two? 一加二等于几？—It's three. 等于三。
三、用来代替前面提到的人或物。
例如：This is my pen. Give it to me, please. 这是我的钢笔，请把它给我。
四、指心目中或上下文中所指的人或物。
例如：1. —Who's that over there? 那边的人是谁？—Is it Bill? 是比尔吗？2. Miss Gao has a computer. It's new. 高老师有一台电脑，它是新的。
五、指身份不明、性别不详的人或者指照片中的人。
例如：—What's the baby in the picture?照片中的那个婴儿是谁？—It's me. 是我。
六、在电话用语中，可用it来指代对方或者自己。
例如：—Hello! Who's it? 喂，你是哪位？—It's Jim. 我是吉姆。
在初中英语教材中，出现了许多由it引导的固定句式，现归纳如下：一、It's time for sb. to do sth. / It's time for sth.意为"是(某人)该干……的时间了"、"到……的时候了"。
例如：1. It's time for supper ／to have supper.该吃晚饭了。
it的用法及句型总结
It的用法一、Tell the functions for “it" in each sentence:1、—--What's the weather together？—-—It is fine。
2. It is hard to communicate with him。
3。
I find it hard to communicate with him。
4。
It is Li that who cleaned the classroom。
5。
It is a book。
二、It 用法归纳1,指代it（1）.用作人称代词：指代物、整个句子(2）用作非人称代词2，形式it:（1)作形式主语（2)作形式宾语3，强调it4，特殊句型5。
在答语中指代this/that：1）.—-—Whose book is that? ——-It’s mine.三、特别注意：it, one和that作替代词的用法及区别1。
it代替前面提到的同一事物,该事物既可以是可数名词也可以是不可数名词。
(特指，指代单数，指代物,同名同物）Can I borrow your pen?-Sorry，I'm using it。
2。
one代替前面提到的同类事物中的一个。
该事物只能是可数名词，前面可以有冠词，也可以被this、that或形容词修饰,其后也可以有定语. (泛指，指代可数名词，指代人或物,同名异物）I have a bike。
Do you have one?Eg：（1）.I bought a dictionary three years ago and I am still using______ now。
(2) I bought a dictionary three years ago but I am going to buy a new _______soon. （3)。
that代替前面提到的同类事物中特指的一个。
英语语法：以it开头的9种主要句式
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做形式主语
it做形式主语形式主语指的是在动名词或者名词性从句做主语时，为了避免主语太长而导致整个句子头重脚轻的情况而用在句首的it，真正的主语（即动名词或名词性从句）则放至句末。
这样就能够保证整个句子形式上的美感。
动名词做主语时it做形式主语动名词to do和doing做主语时it做形式主语主要有以下几种常见句式：(1) it + be + noun + (for sb) to do sth能够满足这个句式的常见名词有：idea, pity, pleasure等。
例句1：It's a hard work for the traffic police to direct traffic in such a hot weather.在如此炎热的天气指挥交通对于交警来说十分艰难。
例句2：It's a good idea to go for an outing in Spring.在春天出去郊游是个好主意。
例句3：It's a pity to miss the biggest automobile exhibition.错过那次最大的车展真遗憾。
(2) it + be + adj + (for sb) to do sth能够满足这个句式的常见形容词有：easy, hard, difficult, necessary, important, possible 等。
例句1：It's necessary to be punctual. 守时很有必要。
例句2：It's difficult for a little kid to totally understand your words.让一个小孩完全理解你的话很难。
例句3：It's common for leaves to fall from the tree in autumn.秋天树叶飘落是普遍现象。
(3) it + be + no good/use/sence.... + doing sth例句1：It's no use complaining about your terrible surroundings.抱怨你周边的恶劣环境是没有用的。
it的9个常用特殊句型
含it的9个常用特殊句型1. It appears/ happens/ seems/ says that…It seems that he is always correct. 他好像总是对的。
It happened that I had no money with me. 碰巧我当时没有带钱。
2. It is said/ reported/ believed/ understood that…It is said that he has joined the Party. 据说他已经入党了。
3. It doesn’t matter…It doesn’t matter what he says. 他说什么都没关系。
4. (It is) no wonder( that) …It’s no wonder he is not hungry; he has been eating sweets all day. 难怪他不饿，他整天在吃糖果。
5.It is a waste of time /money doing sth.It’s a waste of time your talking to him. 你和他谈是浪费时间。
6. It makes no/mush difference…It’s doesn’t make much difference my being there. 我在不在那儿没有什么影响。
7. it takes sb. some time to do sth.It took me nearly an hour to work out the problem. 花了我差不多一个钟才做出那道题.8. It’s one’s turn to do sth.It’s my turn to clean the classroom. 是轮到我打扫教室的了。
9.If it were not for…If it were not for your help, I would still be homeless. 若不是你帮忙，我现在还是无家可归。
高中英语真题-it用作形式主语代替动名词主要用于哪些句式
高中英语真题:it用作形式主语代替动名词主要用于哪些句式it用作形式主语代替动名词的用法主要见于以下句式：1. It is no use (no good, fun, great fun, a new experience, a great ho nour, etc) doing sth。
如：It is no good talking. 空谈是没有用的。
It’s fun working for him. 为他工作很有意思。
It’s great fun sailing a boat. 扬帆驾舟十分有趣。
It’s no use shouting at him—he’s deaf. 向他叫喊是没有用的——他耳聋。
It has been a great honour your coming to visit us. 你来看望我们是极大荣幸。
2. It is good (nice, useless, interesting, pleasant, tiring, etc) doing sth。
如：It is useless speaking. 光说没有用。
It was pleasant sitting there. 坐在那里很愉快。
It’s so nice sitting here with you. 和你坐在一起真是愉快。
It’s good hearing English spoken. 听到人讲英语，我很高兴。
It’s terribly tiring working late like this. 这样干到深夜是非常累人的。
3. it is worth while doing sth。
如：It’s worth while doing the work. 这项工作值得做。
Do you think it’s worth while quarrelling with me? 你认为和我吵值得吗?4. 其他句式。
高考英语：关于It的20个常用句式
⾼考英语：关于It的20个常⽤句式 掌握⼀些⾼级句型对于和作⽂都有很⼤的帮助，下⾯YJBYS⼩编为⼤家搜索整理了关于It的20个常⽤句式，欢迎参考学习，希望对⼤家备考有所帮助!想了解更多相关信息请持续关注我们应届毕业⽣培训⽹! 1.It is+被强调部分+that... 【说明】该句型是强调句型，将被强调的放在前⾯，其他部分置于之后，强调的主语如果是⼈，可以⽤来替换。
如果把这种句型结构划掉后，应该是⼀个完整的句⼦，这也是判断强调句型与其他从句的⽅法。
【例句】 It was they that /who cleaned the classroom yesterday. It was in the street that I met her father. 2. It is not until +被强调的部分+ that... 【说明】该句型译成汉语“直到……才”，可以说是的强调形式。
【例句】 It was not until she took off her sun glasses that I realized she was a film star. =Not until she took off her sun glasses did I realize she was a film star. =I didn’t realize she was a famous film star until she took off her sun glasses. 3. It is clear (obvious, true, possible, certain) that…. 【说明】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结构。
【例句】 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… 【说明】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。
It句型用法详解
It句型用法详解研究1991-2005年的高考试卷中可以发现含it的句型年年考到。
可见it句型的重要性和使用的普遍性。
现根据其用法特点归纳为２０个句型．1. It +be + 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.It was neither you nor he that is willing to go to the Great Wall．It was he as well as his classmates who has ever been to Suzhou．(强调含有either．．．or．．．，neither．．．nor．．．，not only．．．but also．．．，as wellas，not．．．but．．．等词组所构成的句子)强调句型还可以怎样设计？这种提法并不是要把我们弄糊涂，而是要培养我们对该句型的应变能力。
万变不离其宗，要对强调句型产生免疫力，就要对该句型各种可能的考法烂熟于心。
下面我们谈谈强调句的考法设计。
1.1.疑问法：疑问法可分为一般疑问法和特殊疑问法两种。
主要是通过改变语序后将it和that混在一块儿，使考生对结构无法辨认而出错。
这形式可考查考生的纠错能力。
一般疑问句：①. Is _______ student_______ was caught smoking in the classroom?A. it that, thatB. that it, itC. it it, thatD. it which, that特殊疑问句：②. _______ he got up?A. When was that itB. Was it when thatC. When was it thatD. Was that when it③. Where________ he picked the wallet?④. _______ student________ you referred to?结论：一要注意语序；二要注意词序（特殊疑问词要置于句首），三要注意特殊疑问词的选用，疑问代词还是疑问副词。
it作形式主语句式结构
1. It + be + 形容词+主语从句，如：It is uncertain whether he can come to Jenny ' s birthday party or not.2. It + be + 名词词组+ 主语从句，这类名词有：a fact, a pity, a shame, an honour ，a question 等，如：It' s a pity that you missed the exciting football match.It remains a question whether he will come or not.3. It + be + 过去分词+ 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown 等，如：It is reported that 16 people were killed in the earthquake.It is not decided who will give the operation to the patient.4. It + 不及物动词(seem, appear, happen等)+ 主语从句, 这类不及物动词有：appear, happen, seem 等，如：It seemed that he didn ' t tell the truth.It happened that I was out when he called.5. It + be + 形容词+ (for sb.) + 动词不定式这类句型常用形容词easy, difficult, hard, important, possible ，wise 等作表语，有时候为了强调不定式动作的执行者，常在不定式前加for sb ，如：It' s necessary for the young to master two foreign language.It is unwise to give the children whatever they want.这类形容词有：easy, difficult, hard, important, possible ，wise6. It + be + 形容词+ of sb. + 动词不定式，这类形容词常是表示心理品质,性格特征的形容词，如：kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate 等。
it作形式主语的典型句型
fast. 你
是很 的。
4. It be + 名词（形容词）+ doing sth.
it代替真正的主语----- 动名词（短 语 ），可
用于这类句型的名词或形容词有dangerous,
nice, foolish, worth, waste, no good, not any
good, no use,not any use等。例 如 ：
make frie n d s .失去朋友比交朋友更容易。
2. It be + 形 容 词 + of sb. + 动词不定式
(短语）
it代 替 真 正 的 主 语 — 动 词 不 定 式 （短
语)。动词不定式的逻辑主语是由介词of引起
的 ，形容词必须是能表示逻辑主语性格特点
的词。常见的有bad, brave,careless,clever,
unusual, rare,impossible, pleasant等。例 如 ：
① It is important for her to come to
the party. 能
很重 。
" I t is difficult for him to do the math
problem.
是 的。
③ It’s very dangerous for you to run so
。
" I t is wrong of me to pick up your
umbrella.
你的 , 是 的不 。
初中英语必考必背句型——it句型
初中英语必考必背句型——it句型1.It is+名词+ to do sth做某事例It is my pleasure to help you.我很高兴能帮上你的忙。
2. It be+形容词+ o do sth做某事例It is hard to do it on time.这件事很难准时完成。
3. It be+形容词+ of/for sb+ to do sth对某人来说做某事It's kind of you to help me你帮我真是太好了。
4. It is one 's turn to do sth轮到某人做某事了。
It's my turn to do cleaning today.今天轮到我值目了。
5. It is time+for/ to dosth到了做某事的时候了。
例It is time for breakfast.该吃早饭了。
6. It takes sb some time to do sth做某事花了某人多少时间。
It takes me 3 hours to work out the prob-lem.解这道题目花费了3个小时。
7. It is the+序数词+time+that从句这是第…次做某事It is the first time that I have been to Vietnam这是我第一次到越南来。
8. It is said/reported/thought that据说/据报道从为It is said that he is very rich据说他很富有。
9. It is some time since自从……有多长时间了。
It is three years since I left school我毕业已经3年了。
10. It is/was.that/who/whom.正是It was he who read three books in the library yeesterda昨天是他在图书馆读了3本书。
高三英语一轮复习循序写作每周一卷,步步登高层级二7避免头重脚轻的it句式
(5)It offers sb. a chance to do sth.它给某人提供做某事的机会 (2015·北京卷书面表达)It offers teenagers, like you and me, a chance to enjoy sports and learn about Chinese culture. 它给像你和 我一样的青少年提供了一个享受运动和了解中国文化的机会。 (6) It makes no sense for sb. to do sth.某人做某事没有意义
It makes no sense at all for parents to let children study their lessons all the day.
父母让孩子们整天学习功课根本就没有意义。
4．It is / was ＋ adj.＋ (of/ for sb) to do sth (1)It is necessary for sb. to do sth.“对某人而言做某事是必要 的”
9．It is the first time for sb. to do sth.某人第一次做某事 It is the first time that sb. has/ have done sth.某人第一次做某 事 It was the first time that sb. had done sth.某人第一次做某事 (2018·安徽第一次检测书面表达)Since it is the first time for us to go to Australia, we’d like to know the details about the
把真正的主语后置，作真正主语的常为不定式或从句，有时也可 用动名词。
1．It is / was ＋adj./n. ＋ that (1)It’s necessary/important that sb. (should) do... 某人 做……是必要的/重要的 With the society developing very fast, it’s quite
含it的10种句式
Ｉｓｙｕ ｒ ｅｏ ｕｙｔｍ ｒ ｗ 明 天轮到你值 日了 。 ｔ ｏ ｒ ｕｎｔ ｂ ｎｄ ｔ ｏ ｏｒ ． ’ ｔ ｏ ｏ
ＩＳｔｅ ｒ ｗ ｅ ｅ ｏｒ ｏａ ． 天轮到 他们扫 地 了。 ｔ ｉ ｔ ｎｔ ｓ ｅｐｔ ｏ ｄ ｙ 今 ’ ｈ ｒｕ ｏ ｈ ｆ ｔ ｌ
『 式 四］Ｉ ｉｈ ｓ ｅｎ＋时 间段 ＋ｓ ｃ 句 ｔ ｓ ａ ｅ ／ ｂ ｉ ｅ从句 （ ｎ 一般 过去 时 ） 意为 。 “ 自从 …… 以来 已经过 了…… （ 时间 ） 。 ” 例如 ：
Ｉ Ｓｔｎ ｙ ａｓｓ ｃ ａ ｅ ｅ （ Ｉｈ ｖ ｅ ｎ ｈ ｒ ｏ ｎ ｙ ａｓ） ｔ ｅ ｅ ｒ ｉ ｅＩｃ ｍｅｈ ｒ． ＝ ａ ｅ ｂ ｅ ｅｅｆｒｔ ｅ ｒ． ’ ｎ ｅ
Ｉ１ｔｋ ｎｖｆ ｅｍ ｎ ｔｓｔ ｗ ｌ ｈｒ． ｔ１ ａ ｅｏ ｌ ｉ ｉｕｅ ｏ ａｋｔｅｅ 步行 去 那 里 只 需 要 五 分 ’ ｖ
九
在
级
钟。 Ｉ ｔｏ ｅｋｔ ｆ ｉ ａ ｉ ｅｂ ｏ ． 花一 周 时 间读 完 了 ｔ ｏｋｍｅａｗ ｅ ｎｓ ｒ ｄｎ ｔ ｏ ｋ 我 ｏｉ ｈ ｅ ｇ ｈ
正 ： ｎ ｙ ｕｔｌ ｍｅｈ ｗ ， Ｏｔ ｅ ｏｔｅｓ ｔ ｎ Ｃａ ｏ ｅｌ ｏ Ｃ ／ ｇ ｔｔ ｔ ｉ ？ ｈ ａｏ
圆
固
— ｉ — — —
—
—
—
—
—
—
—
～
—
—
—
—
—
—
ｊｉｒ — ７
０ 学
良
晤
回 国
这本 书 。
『 式三 １Ｉ ｉ ｏ ｅ ｒ ｏｓ ． 为 “ 到某人 做某 事 了 ” 例 句 ｔ ｓ ｎ’ ｔ ｎｔ ｄ ｔ 意 ｓｕ ｏ ｈ 轮 。
It句型及倒装句
“It”用法及其句型和固定搭配一、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1. 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……(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 …(4) 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） (5) It is v-ed that …(should)…(verb=demand, request, require, order, suggest, advise, recommend 例 It is suggested that they should beg in with the third question.三、It作主语的句型1. It's (just)(un)like sb. to do某人的风格2. It's (about/high) time that… should /v-ed…3. It's the x-th time (that) … have v-ed…4. 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5. It was(not)…before…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。
it作形式主语的几大基本句型
it作形式主语的几大基本句型形式主语，顾名思义，即形式上是主语，但实际上不是真正的主语，真正的主语是后面的动词不定式、动名词或主语从句等。
如果让后面的动词不定式、动名词或主语从句用作主语，那么在句式上容易造成“头重脚轻”，句式不平衡，故往往用it作形式主语，而把真正的主语放在后面。
it在这里没有任何意义。
it作为形式主语常常用在以下几个句型。
◇It’s +形容词/名词+that +从句It is necessary that you train yourself before the walk.It is important that you have your own support team.It was a pity that he lost the game.It’s a pity that you missed the exciting football match.◇It’s +形容词+(for sb) +to do sthIt is difficult to walk through eight country parks.It is useful to have support teams.It is important for him to finish it in ten hours.It is necessary for people to learn team spirit.特别提醒：☆该句型的否定结构为It’s +形容词+(for sb) +not +to do sth It is very important not to give them too much food.It is very polite not to speak loudly in public.☆该句型有时可以与It is + adj. + that从句的句型互换使用，意思不变。
如：It is necessary for you to train yourself before the walk. = It is necessary that you will train yourself before the walk.◇It’s +名词+to do sthIt’s everyone’s duty to obey the law.It is not a good habit to stay up too late.As a student, it is bad manners to come late to class.It is my turn to clean the blackboard.◇It takes sb +some time to do sthIt took us two hours to set up the stage.◇It seems that +从句It seemed that he didn’t tell the truth.◇It’s +过去分词+从句惯用句型有：It is said that(据说), It is reported that(据报道), It is believed that(大家相信), It is hoped that(大家希望), It is well known that(众所周知), It is thought that(大家认为), It is suggested that(据建议)等。
代词it基本用法小结
代词it基本用法小结代词it基本用法小结人称代词it可以用来代替一个名词、一个短语、一个从句或一个句子，以避免它们在句中的重复。
这时它可以指提到过的，也可以指未提到过的，在句中作主语或宾语。
(1) 替代刚提到过的同一事物This is our new car. I bought it yesterday. 这是我们的新车。
我昨天买的。
(2) 指动物或不考虑性别的婴儿Where is the cat? It’s under the bed. 猫在哪？它在床下面。
The baby cried when it was hungry. 这婴儿饿时就哭。
(3) 在情景中确认某人或事物Who is it? It’s me. 是谁？(问敲门人) 是我呀。
Who’s it over there? It’s the milkman. 那边那人是谁？那是送牛奶的What’s this? It’s a map. 这是什么？这是张地图。
(4) 指代前句或后句所述的情况He smokes in bed and I don’t like it. 他在床上抽烟，我不喜欢他这样。
When the factory closes, it will mean 500 workers will be out of work. 工厂一旦关闭, 那就意味着要有500工人失业。
It would be ideal if you could join us. 如果你能和我们合作，则太好了。
(5) 指时间、距离、天气或环境等What time is it? It’s seven o’clock. 几点了？7点。
It’s time for supper. =It’s time to have supper. 是该吃晚饭的时候了。
It’s about 50 kilometers from here to my home. 从这儿到我家约有五十公里。
It is snowing. 正在下雪It was very quiet in the garden. 公园里很寂静。
21版：避免头重脚轻的it句型(步步高)
避免头重脚轻的it句型在英语中，为了避免头重脚轻，保持句子平衡，经常运用it作形式主语或形式宾语，而把真正的主语或宾语后置，作真正主语或宾语的常为不定式或从句，有时也可用动名词。
it 有时也可以用在一些固定句型中。
灵活地运用it句式可使文章更高级，结构更紧凑。
一、it作形式主语的常用句型1．It takes (sb.) some time/energy/effort...to do sth.It took the students about two hours to finish cleaning the classroom that day.那天花了同学们大约两个小时才把教室打扫完。
2．It is/was＋名词/形容词＋(of/for sb.) to do sth.Honestly speaking，it’s so nice of you to offer me a class of practical learning skills.说实话，你能给我上一堂实用的学习技巧课真是太好了。
(2019·浙江)It’s indeed a pleasant surprise for me to even rank first in a recent English speech contest.在最近的一次英语演讲比赛中，我竟然名列第一，真是令人惊喜。
(2019·浙江)3．It is/was＋名词/形容词/过去分词＋that...It is true that the Internet plays an important role in our daily life.确实，网络在我们的日常生活中扮演重要的角色。
It’s said that rap music was invented by a classical musician in 1912.据说，说唱音乐是一位古典音乐家在1912年创立的。
It 的 13 个常用句型及其运用!书面表达必备!
It 的13 个常用句型及其运用！书面表达必备！It 的13 个常用句型及其运用it 虽然并不显眼，但只要运用得当，也能在书面表达中发挥出巨大的作用，给人以高大上的感觉。
本文在归纳其常用的句式结构的基础上着眼于在书面表达中如何恰当地运用it 的相关句型，以达到优化句子，增加文章亮点。
01一、it 句型的归纳：( 一) it 作形式主语的 6 个句型句型1. It is + adj. (=of n.) + for sb. to do sth. / that... 某人做某事是……的。
Will it be convenient for you to start work tomorrow? 你明天开始工作方便吗?It is vital /of great significance for students to take regular exercise. = It is vital /of great significance that students should take regular exercise. 定期进行锻炼这对学生来说太重要了。
句型2. It is a shame / pity that... 很遗憾……(1) It is a shame that some students should scribble and litterrandomly on the campus. 一些学生竟然在校园中乱涂乱画，乱扔垃圾，这真是太不应该了。
(2) It is a pity that I cannot go to see the movie on Saturday evening. 很遗憾，周六晚上我没办法陪您去看电影了。
说明： that 引导的从句为主语从句，从句中谓语动词的语气分两种情况：①表述的内容是事实，用陈述语气 , 如例句 (2) ；②若内容表明说话人的一种语气 / 情感则使用虚拟语气 , 如例句 (1) 。
it的用法、常用句型
I’d prefer it if I didn’t have to do so much
work.
I would appreciate it very much if you would
help me with it.
b. 动词+介词+ it + that从句 能用于此句型的主要有：depend on, answer for, see to。如： You may depend on it that he will turn up in time.
reputation of an honest man.
It was no accident that such a book should
appear in the 18th century. 2) “It + be +形容词+主语从句”中从句谓语常用 “（should +）动词原形（或完成时）”。常用 于本句型的形容词主要有impossible, strange,
2. —Steven’s parents have bought him a computer.
—__I_t _ __is__ __n_o_ _w__o_n_d_e_r_ (难怪) that he looks so happy.
3. Susana’s aim is to tell all citizens they have a duty to protect the environment, _is_n_’_t_ __it_ (对吗)?
2. Raise your leg and let 65 stay in the air for seconds. （辽宁2014第三部分）
高中英语it 用作形式主语宾语的用法及24个it句式盘点总结(有习题)
高中英语it 用作形式主语/宾语的用法及24个it句式盘点总结一、用作形式主语当不定式、动名词、从句等用作主语时，避免头重脚轻，通常在句首使用形式主语it，而把真正的主语放在句子末尾。
如：It is stupid to do such a thing. 做这种事真蠢。
It’s no good sitting up too late. 熬夜没有好处。
It is necessary that he should be sent there at once. 有必要马上派他到那里去。
注：类似以下句子中的it也可视为形式主语：It happened that the harvest was bad in 1988. 碰巧1988年的收成很不好。
It seems that she is afraid to tell them about it. 似乎她怕将此事告诉他们。
二、用作形式宾语当不定式、动名词、从句等用作宾语且其后跟有宾语补足语时，就应在宾语补足语前使用形式宾语，而将真正的宾语移至句末。
如：I’ve made it a rule never to hurry. 我已养成凡事从容不迫的习惯。
Do you think it possible to root out crime? 你认为可以根除犯罪吗?He found it difficult to breathe at high altitudes. 他觉得在高空呼吸困难。
注：通常意义的形式宾语主要见于真正宾语为不定式、动名词、从句等且其后跟有宾语补足语时的情形，即用于“动词+it+宾语补足语+真正的宾语”这样的结构，但以下两类形式宾语却比较特殊，其后没有宾语补足语：1. 由于介词后通常不能直接跟that从句作宾语，有个别特殊结构就在介词后先接it作形式宾语，再跟that从句。
如：You may depend on it that it is true. 你可以相信这是真的。
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it的9种主要句式
it句型是初中英语中使用频率较多的重点句型之一，为了便于同学们搞好中考复习，现将常见有关it的主要句式归纳如下：
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“好似、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.看来没有人了解这件事。
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，替代后面的不定式to do sth.(真正主语)。
如：It is easy to speak English. 说英语很简单。
6.“It is+形容词+for X.+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 X.+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。
如：It is very nice of you to help me find my bike.你帮我找到了自行车真是太好了。
8.“It takes X. some time to do sth.〞表示“某人花费多少时间做某事〞。
其中it是形式主语，真正主语是后面的to do sth.。
如：It takes me about half an hour to walk to school every day.我每天花费大约半小时步行去上学。
9.“X. thinks it+形容词(for X.)+to do sth.〞中的it是形式宾语，后面的动词不定式是真正宾语，形容词在句中充当宾语(it)的补足语，运用于这种句式的谓语动词有：think，find，believe，feel等。
如：He found it very important for the students to learn English well.他发觉对于学生来说学好英语很重要。