it的句型汇总(一)
it的句型汇总（一）
It 既是代词，也是引导词（语法亦叫功能词），是最简单也是用法最复杂的一个词。作为代词，it主要用于指代前文提及的某种事物、某种情况，甚至还可以指性别不明确的人；也可以指时间、日期、地点、距离、天气、温度、环境等。作为引导词，it可以用作形式主语、形式宾语以及引导强调句型等。关于it作为代词的用法，大家都已经十分熟悉。本文不再赘述，而主要对it作为功能词的用法，做一归纳和总结。
1. It is necessary (for sb.) to do sth. 句式
在该句式中，it是形式主语，动词不定式是真正主语，不定式的逻辑主语用for sb.。句式中的形容词通常表示不定式的重要性、必要性、难易程度等基本情况。如important, necessary, natural, easy, safe, common, normal, hard, difficult, dangerous, unusual, rare, impossible, pleasant等。例如：
It is very important for us to take part in physical training out of class.
It is too difficult for a three-year-old child to answer such a question.
不可以说：
*We are very important to take part in physical training out of class.
*A three-year-old child is too difficult to answer such a question.
2. It is kind (of sb.) to do sth. 句式
该句式与上述句式十分相似，形容词往往表示不定式逻辑主语的品质或特征属性，所以用of sb., 不用for sb. 常见的这类形容词有：good, bad, brave, careless, clever, cruel, foolish, honest, horrible, kind, lazy, modest, naughty, nice, polite, rude, silly, stupid, wise, wrong,
等。例如：
It is very kind of you to help me out of trouble.
It was brave of him to jump into the river to rescue the drowning boy.
上述两句可以转换为：
You are very kind to help me out of trouble.
He was brave to jump into the river to rescue the drowning boy.
3. It is no good (use, pleasure, fun) doing sth. 句式
该句式中，it是形式主语，表语部分是否定意义，形容词往往表示“益处，用处，乐趣”等含义，真正主语一般用动名词形式。例如：
It is no good learning English without speaking English.
It is no fun climbing mountains on raining days.
4. It is clear (apparent, obvious, true, probable, likely, possible, impossible, certain…) that句式
该句式中，it 是形式主语，真正的主语是that 引导的主语从句，这是it引导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.
It is very likely that he will not consent. = That he will not consent is likely.
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It的几个特殊句型
It的特殊句型 一、高考真题 1． (他突然想到) that he had an important conference to attend the next morning.( occur)（11高考78题） 【答案】It occurred to him 【解析】本题考察的是occur引导的句型”it occurs to sb。that（某人突然想到）“根据后面的动词提示”had“，故要用一般过去时. 2.During his last lecture, the scientist_________ (觉得) easier to explain the theory to those with some background knowledge.(find)(09高考73题) 【答案】found it/ found （that）it was ks5u 【解析】考查句型结构。根据提示词find及后面的形容词easier可知此处可使用find it + adj.的结构，it后加be动词变做宾语从句也对，此句时态为一般过去时。 34. _______ _ (我花了) one thousand dollars to buy the painting last week. (cost) (08高考34题) 【答案】It cost me 【解析】考点：it做形式主语（特殊句式）关键词：It cost（★It不用不给分，cost写成co sted 扣0.5分）结构部分：It cost somebody how much money to do something 其它部分：me 二、考点分析 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 is your efforts, not your intelligence, __________(决定) your success. (determine ) It was about 600 years ago that the first clock with a face and an hour hand was made. 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，believed....) 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 ...
It作形式主语常见用法
It作形式主语常见句型 1.It + be +形容词+ that-从句 可用于此句型的形容词有: wonderful, true，good，right，wrong，（un）important，useless，surprising，disturbing,frightening,alarming,clear，unusual，lucky，certain, necessary等。如： ①It is quite certain that he will be at the meeting.他将出席会议是无疑的。 ②It is surprising that he came late to school this morning.他今天早上迟到真令人惊讶。 ③It is important that we (should) study hard.我们努力学习是很重要的。 注意: 该句型中的形容词是（un）important, necessary等时，从句应为(should )+动词原形。 It is important that we (should) learn English well. It is necessary that he (should) rember these words. 2.It + be +名词+ that-从句 适用该句型的名词（词组）有: a pity，an honor，a good thing，a fact，a surprise，a question,a shame,a custom, a truth,our hope, no wonder, good/bad manners等。如： ①It is a pity (that) you missed the sports meeting last week.你错过了上周的运动会太可惜了。 ②It is a fact that Engl ish is being accepted as an international language.事实上英语已经被作为一种国际语言而接受了。
it的用法归纳
?Never be afraid of grammar ?Collect some examples; ?Watch them very carefully; ?Find out something in common; ?Try to use the rules ---- practise. it用法完全归纳 一、it 作人称代词的用法 1.指事物 作为人称代词，it 可以除人以外的一切事物或动物。如： I dropped my watch and it broke. 我把手表掉在地上摔坏了。 It’s hard work, but I enjoy it. 工作很辛苦，可是我乐意干。 “Where is the dog?”“It’s in the bedroom. ”“狗在哪?”“在卧室里”。 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 it a boy or a girl? 是男孩还是女孩? There is a knock on the door. It must be the postman. 有人在敲门，一定是邮递员。 【说明】在答语中，常用来指本人，如说It’s me。
3.代替某些代词 代词it 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?”“It’s a new machine. ”“这是什么?”“是一种新机器”。 Nothing is wrong, is it? 没出什么问题，是吗? 二、it 作非人称代词的用法 1.基本用法 it 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。如： It’s too late to go there now. 现在去那儿已经太迟了。 It rained all day yesterday. 昨天下了一天的雨。 It can get very hot here. 这里有时会很热。 2.用于某些句型 It’s time for sth. 该做某事了。 It’s time to do sth. 该做某事的时候了。 It’s time for sb to do sth. 某人该干某事了。 It’s (about / high) time + that-从句. 某人该做某事了。(从句谓语用过去式，有时也用“should+动词原形”) It’s first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)
it开头的惯用句型
it开头的惯用句型 【疑难点津】it常放在句子开头，作某些惯用或固定句型的主语。常见句型有： 1.“it+be+特定动词的过去分词+that从句”。这样的过去分词有：said, reported, believed, known, decided, proved, thought, arranged等。如： It is said that my German teacher often goes to Germany to do research.据说我的德语老师 经常去德国做研究。 2. “it +特定动词+ that从句”。这样的特定动词有：appear, happen, occur, seem等。如： It never occurred to me that I would travel to America.我从没想过我会去美国旅行。 3. “it +特定动词+ as if从句”。这样的特定动词有：appear, seem等。如： It appears as if you are very tired.看起来你好像很累。 4. “it has been/is +一段时间+ since从句”。从句中谓语用短暂性动词时表示“自从该动词动作发生以来有一段时间了”；用持续性动词时表示“自从该动作结束以来有一段时间了”。试比较： It is six years since I began to work here.自从我在这儿工作以来已经有六年了。 It has been six years since I worked here.我不在这儿工作已经有六年了。 5. “it +be+一段时间+ before从句”。从句中谓语用短暂性动词；主句中be动词可以用肯定式或否定式，其时态可以是一般过去时或一般将来时。常译为“……才……”或“……就……”。如： It won’t be a long time before we finish cooking.不久我们就会把饭做好。 It was four days before they found the lost child.过了四天他们才找到那个失踪的孩子。 6. “it is (high) time + that从句”。表示“到了某人该做某事的时间了”，从句谓语要用一般过去时，也可用should do的形式。另外“it is (high) time for sb. to do sth”,也表示同样的意思。如： It is high time that I went to see my mother in the hospital.到了我去医院看妈妈的时间了。 It is time for you to do your homework.到你做家庭作业的时间了。 7. “it is/was +强调内容+ that/who从句”。这是一个强调句型，强调的内容是事物或是指人的宾语时，常用that引导从句；强调的内容是指人的主语时通常用who引导从句。如：It is in the street that I came across Mr. Li.是在街上我碰到了李先生。 It was my friend who picked me up at the station. 是我朋友在车站接上我的。 【考题链接】 was in 1979 I graduated from the university. (1998上海卷) A. That; that B. It; that C. That; when D. It; when When you are old and grey and full of sleep, And nodding by the fire, take down this book,
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。 2. It's time for me to study.我该学习了。 二、It takes(sb.)some time to do sth.意为"(某人)花……时间做某事"。例如： 1. It takes twenty minutes to go to school by bike. 骑自行车上学要花二十分钟的时间。 2. It took me a week to finish reading the book. 我花了一周时间读完这本书。 三、It is one's turn to do sth.意为"轮到某人做某事了"。例如： It's your turn to be on duty tomorrow. 明天轮到你值日了。 四、It is ／has been ＋时间段＋since ＋一般过去时，意为"自从……以来已过了……(时间)。" 例如： 1. It is / has been four days since I caught a cold. 我感冒已四天了。 2. It is / has been two weeks since we met last. 自从我们上次见面以来已过了两周。 五、It seems ／seemed ＋that从句，意为"看起来好像……"。例如： It seemed that our team was going to win. 我们队看起来好像要赢了。 六、It's＋表语＋to do sth.。例如： It's a good idea to go out for a walk. 出去散步是个好主意。 七、It's ＋adj.＋that从句。例如： It's true that I may fall behind the other students.我真可能落在别的学生后面。 八、It's＋adj.＋of(for)sb.＋to do sth.。对于这个句型究竟用of还是用for，主要取决于前面的形容词。如果形容词是描述不定式行为者的性格、品质等的，如kind，good，nice，clever 等用of；如果形容词仅仅是描述行为的则用for，这类形容词常见的有difficult，easy，hard，important，dangerous等。例如：
-it的用法及强调句型(精心整理)
it的用法及强调句型 it的用法 一、it作指示代词【完成句子】用one，ones，it，that，those填空 (1) — I can't find my watch. —You haven't found ______？If you want to buy a new ______，I suggest you buy ______ made in China. (2) We've got a big cup and two small ______. (3) The weight of an elephant is much greater than ______ of a tiger. (4) The books on the first shelf are easier than ______ on the second shelf. (5) The boy told his story and ______ of the girl upstairs. 【答案】(1) it; one; one (2) ones(3) that (4) those / the ones (5) that / the one 【结论1】 ①指代上文提过的事物时，it指的是同名同物，相当于the＋名词； ②one指的是同名异物，表示单数可数名词相当于a ＋名词；a / an＋形容词＋one等于a / an＋形容词＋名词；复数形式用ones； ③that后面常有后置定语，有特指意义，代替不可数名词或单数可数名词，相当于the＋ 名词； ④复数名词用those，相当于the ones。 【例句观察】— Someone is knocking at the door. Who is it? — It must be Leo. He said he'd come to see me. 【结论2】it指代人时，常指小孩或身份不明的人。 【例句观察】It's too quiet in the room. Everyone just keeps silent. 【结论2】it可用以指代环境或情况。 (6)— What time is it now? — It's half past seven. (7)— It is spring now and it's warm these days. 【结论3】it可用以指代时间、季节、天气或距离。 【注意】it指代时间时，有如下一些句型： (1) It is time for sth. (for sb.)to do sth. / that－从句(should do / did, 必须用虚拟语气) 例：① It's time for lunch. ② It's time for us to clean the house. ③ It's time that we should clean the house. ＝It's time that we cleaned the house. (2) It is / has been ＋some time ＋since－从句(从句用一般过去时) It is 10 years since I graduated from college. (3) It / This/That is the first / second time that－从句(必须使用现在完成时)这是某人 第……次做了某事。 It / This/That was the first / second time that－从句(必须使用过去完成时) 例：①It is the second time that she has visited the Great Wall. ②This was the first time that I had come late to school. (4) It was ＋时间点＋when －从句 例：It was evening when we got home. ＝It was evening in which we got home. (5) It was / will be ＋some time ＋before －从句 例：①过了5年他们才从北大毕业。 It was five years before they finally graduated from Beijing University. ②不久，我们就要从我们学校毕业了。 It won't be long before we graduate from our school. 二、it作形式主语 1.代替主语从句 ①It is clear ( obvious，true，possible certain....) that ..... “清楚（显然，真的，肯定．．．）” 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.
常用it作形式主语的句型结构
常用 it 作形式主语的句型结构 ?It + be +形容词+ that-从句 可用于此句型的形容词有 : wonderful, true，good，right，wrong，(un)important ，useless，surprising， clear, unusual, lucky, certain, necessary等。女口： ①It isquite certain that hewill be at the meeting. ②It is surprising that he came late to school this morning. ③It isimportant that we(should) study hard 注意：该句型中的形容词是(un) important, necessary等时，从句应为(should )+动词原形。 ?It + be + -ed 分词 + that-从句 适用该句型的过去分词主要有：said,reported, announced,hoped,thought, told, believed, expected, decided, suggested,known 等。如： ①It ishoped thatonedaytheywill haveenoughanimalsto setthem free ②It is well known that the earth goes around the sun. ③It is suggested that the sports meeting (should ) be put off until next week. 注意：该句型的过去分词是suggested时，从句应为(should )+动词原形。 ?It + be + 名词 + that-从句 适用该句型的名词 (词组) 有：apity, anhonor, agood thing, afact, asurprise, goodnews, one's duty 等。如： ① It isapity (that)you missedthesportsmeetinglastweek. ② It isafactthatEnglish isbeingacceptedasaninternational language. ?It ＋seem／ appear／ happen 的适当形式＋ that 从句。该句型常可以转换成含不定式的简单句。如： ①It seemsthat thereisabig wastepipecomingdown from the town. T There seemsto be a big waste pipe coming down from the town. ②He appearedto becalm,but insidehisheartwasbeatingwildly with fear. t It appearedthathewascalm,butinsidehisheartwasbeatingwildly with fear. ?It does n't matter ( It 'no won der; It does n 'make much differe nee 等) ＋ when/ where/ which/ whether 等从句。如： ①Does it matterif hecan'tfinish thejob ontime? ②Theyareallclassmates. It isnowonder they should help eachother with their studies. ?It + be+ adj./ n. (for sb./ ofsb.)+ todosth. 该句型中的形容词通常是表示事物的特点或特征的如 difficult , hard, easy, impossible, necessary, important 等,此时用 fo r ；或表示人的性格特征或特点的如nice, good, bad, kind, silly, foolish, wise, clever, careless, rude, brave, cruel, careful, grateful等，这时要用 of。如： ① It is foolish of you to give up such a good chance. ② It is necessary for college students to master at least a foreign language It 作形式主语常见句型 动词不定式，动名词或主语从句作主语时，通常把它们放在谓语动词前，而用 it 作形式主语，放到句首，常见句型有：
It的用法及典型句型归纳. 个人总结
It的用法及典型句型归纳 一、人称代词it的最基本用法是作代词，主要指刚提到的事物，想法，以避免重复;也可以指性别不明或性别被认为是不重要的人或动物；未指明但谈话双方都明白的事情或情况。 ①They watched the train until it disappeared in the distance. ②Is this your dog？No, it isn’t. ③I hate it when people talk with a full mouth.． 二、.非人称代词.it有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等： It is a lovely day, isn’t it? // It was nearly midnight when she came back. It is April First today. // It is some 3000 kilometers from A to B. It is three dollars. // Today it is 30 degrees centigrade. 三、作形式主语，替代主语从句，动词不定式，或动名词短语 1.作形式主语替代主语从句 ⑴It is clear ( obvious，true，possible，certain....) that ＂┅清楚的（显然的，真的，可能的,肯定的．．．）＂ ⑵It is important ( necessary，right，strange，natural...) that + (should ) do (虚拟语气) ┅是重要的(必要的,对的,奇怪的,自然的┅) ⑶It is said (reported/ learned/believed/thought/known/told/hoped.....) that = sb / sth is said (reported/ believed /thought…) to do( to be doing/ to have done) sth ＂据说（据报道，据悉．．．）＂。 ⑷It is suggested ( advised/ ordered / demanded/ insisted/ commanded... ) that +(should ) do ＂据建议；有命令．． ⑸It is a pity ( a shame /an honour/a good thing/a fact,/a surprise/... ) that 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。 小练一下： It is very clear that he’s round and tall like a tree. = It is important that we (learn) English well. It is necessary that he (remember) these words. It is said that he has come to Beijing. = It is reported that another earth satellite has been put into orbit. = It is suggested that the meeting ( put off). It was ordered that we (arrive) there in two hours. It is a pity that such a thing ( happen) in your class. It is a pity that he (be) ill. 2.作形式主语替代不定式 . ⑴It is kind ( of sb. ) to do sth.= sb be kind to do sth.一般都是表示人的特性的形容词。如： bad /brave /careless/ clever /cruel / foolish / good （好心的）/ honest/ kind / lazy / modest/ naughty/ nice（有教养的）/polite/ rude / silly / stupid / wise ，等。 Eg. It is kind of you to give me a hand. = ⑵It is necessary ( for sb. ) to do sth. .不定式的逻辑主语是由for引起。常见的形容词有： Important/ necessary/ natural/ easy / safe / common / normal / hard / difficult / dangerous/ unusual/ rare / impossible / pleasant Eg. It is important for her to come to the party.
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it 4，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。该事物既可以是可数名词也可以是不可数名词,必须要有后置定语,但不可以有前置修饰语。（特指，指代单数或不可数，指代物，后面有定语） The coffee produced in Brazil is more famous than __________in Mexico. 四：形式主语、宾语、强调句及其他
It的用法、Therebe句型
期末专题练习——It的用法、There be句型 ［教学内容］ 第一部分It 的用法 概说：It是个非常简单的单词,但其用法却很灵活。 一、指代作用。It作句子的主语。 （一）It指前面已经提到过的人或事物。 1. What’s this? —It’s a chair. 2. Who is it? —It’s me. 提示：it代替上文提及的原物(复数用they)； one指代上文提及的、泛指的可数名词单数（复数ones）； that指代上文提及的定指的可数名词单数或不可数名词（复数those）。 （二）It指时间、季节。虚义。 1. What time is it? —It’s nine. 2. It’s time to go to school. Let’s go. 3. What day is today? —It’s Saturday. 4. What is the date today? —It is Oct. 1st. 5. What season is it? —It is summer. （三）It指气候。虚义。 1. It is cold in this room. 这个房间很冷。 2. What’s the weather like today? —It’s fine. 今天天气怎么样？天气很好。 3. It often snows in winter in Harbin. 哈尔滨的冬天经常下雪。 （四）It指距离、情况等。虚义。 1. It is five kilometers from my home to the school. 从我家到学校有五千米。 2. It is very near from this shop to that. 从这个商店到那个商店很近。 3. It is a long way to the sea. 这离海很远。 4. Is it well with you? 你身体好吗？ 二、It作形式主语。 动词不定式、动名词短语、从句在整个句中起主语作用，而这一部分用词较多，因此
It构成的句型小结
It 构成的句型小结 一、It 作形式主语的句型 为使句子平衡，往往把 it 置于句首作形式主语，而把真正的主语(通常是不定式短语、动名词短语或主语从句)移至句末。 It 作形式主语的句型有： ㈠ it 代指不定式短语的句型 1. It takes + (sb.) + sometime / some money + to do sth. 做某事花去某人多长时间 Just a minute, it won't take me long to change. 等一下 ,我很快就可以换好衣服。 It takes five minutes to walk there. 走到那里需要 5 分钟。 It took me three days to prepare for the examination. 我花了三天准备那次考试。 It takes a lot of money to buy a house like that. 买那样一幢房子需要很多钱。 2. It takes + 名词 + (for sb.) to do sth. .................. 某人做某事需要 It took great imagination as well as patience for Annie to teach me to speak. 对安妮来说，教我说话需要极大的信心和想象力。 It takes time for them to prepare for the great changes that take place in space. 他们需要很多时间准备应付太空中所发生的巨大变化。 3. It is + 形容词+ (for / of sb.) to do sth. 某人做某事是... 的 for sb. 的句型常用于表示事物的特征特点，表示客观形式的形容词，如easy, difficult, hard, important, possible, impossible, comfortable, necessary, better 等。 of sb 的句型一般用表示人物的性格，品德，表示主观感情或态度的形容词，如kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate( 考虑周到的), silly, selfish( 自私的) 等。 It was kind of you to help us. 谢谢你对我们的帮助。 What time would it be most convenient for me to call again? 什么时候我再给你打电话最合适？ It 's very good of you to have listened to me. 感谢你能听我讲。 4. It is + 名词+ to do sth. 做某事是..... 的 常用于该句型的名词有： manners, duty, fun, good, a great honour 等。 As a student, it is bad manners to come late to class. 作为学生，上课迟到是没有礼貌的。 It is our duty to pay taxes to our government. 向政府交税是我们的义务。 5. It is + one ' s turn + to do sth.轮到某人做某事 It was my turn to clean the blackboard. 轮到我擦黑板了。 It is his turn to take the children to school. 今天该轮到他送孩子们上学了。 6. It is + up to sb. + to do sth. 做某事是某人的责任或义务 It 's up to us to give them all the help we can. 我们理应竭尽所能地给予他们帮助。 It 's up to you to decide whether to go or not. 应该由你决定是否去。 Up to you! 由你来定！ ㈡ it 代指动名词短语的句型 7. It is + 名词+ doi ng sth. 做某事是..... 用于该句型的名词有：no good, no use 等。 It 's no use talking to him about it. 和他谈论此事是没用的。 It 's no use/good (in) crying over spilt/spilled milk. 事已至此，后悔也无用。(牛奶已泼，哭也没用。) 8. It + be + 名词 + that 从句 用于该句型中的名词有： a pity, a shame, a fact, an honour, a wonder, a good thing, good news, no wonder 等。惯用句型有： It is com mon knowledge that ........ 是常识
高中英语语法权威解析二---“It”用法及其句型和固定搭配讲解(附练习题)
第二章“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. +clause It'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 + clause It+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.