人教版英语选修六高二 unit3 语法 Grammar— it的用法(1)
(完整版)人教版英语选修六高二unit3语法Grammar—it的用法(1)
Section_ⅢGrammar—it的用法(1)语法图解探究发现①It is a beautiful day here and I am sitting under the big tree at the end of the garden.②Your mother tells me that you started smoking some time ago and now you are finding it difficult to give it up.③It is never too late to mend.④It is no use talking to them.⑤It is said that he stole the money.⑥I think it difficult to learn English well.⑦We make it clear that speaking to the teacher in that way is not polite.⑧I don't like it when people talk with the mouth full of food.[我的发现](1)①句it表示天气，②句第一个it代替to_give_it_up作形式宾语；第二个it代替句中所说的“吸烟”的事。
(2)在句③④⑤中it用作形式主语，其中句③用在“It is＋形容词＋(for/of＋sb.)＋动词不定式(短语)”中，it指代动词不定式(短语)；句④用在“It is＋no use/good＋动名词(短语)”中，it指代动名词(短语)；句⑤用在“It is＋said/believed/reported＋that从句”中，it指代that 从句。
(3)在句⑥⑦⑧中it用作形式宾语，其中句⑥用在“动词＋it＋形容词＋动词不定式(短语)”中，it指代动词不定式(短语)，句⑦用在“动词＋it＋形容词＋that从句”中，指代that 从句；句⑧it用在某些特殊的句式中，指代when从句。
Grammar it的用法
be+介词短语； 介词短语； 介词短语 e.g. It is against the law to do that. 这样做是违法的。 这样做是违法的。 其他类型的谓语 e.g. It gives me great pleasure to see the movie. 观看这部电影让我很高兴。 观看这部电影让我很高兴。
3. 用于强调结构 要强调句子的某一部分, 通常是主语、 要强调句子的某一部分 通常是主语、 状语、宾语, 可以把it当作先行词 当作先行词。 状语、宾语 可以把 当作先行词。 这种句子的结构是： 这种句子的结构是： “It is/was+被强调部分+that/who+
句子的其他部分” 句子的其他部分”。如果强调的是 人,可以用who, whom代替that。
It remains to be seen whether it will do us harm or good. 对我们有好处还是有害处, 对我们有好处还是有害处 还要等着 瞧。 It was clear enough what he meant. 他的意思很清楚。 他的意思很清楚。
2. 作形式宾语。 作形式宾语。 当复合宾语中的宾语是不定式、 当复合宾语中的宾语是不定式、动 名词、宾语从句时 名词、宾语从句时, 往往把宾语放 在它的补足语后面, 而用 作形式宾 在它的补足语后面 而用it 放在宾语补足语之前。 语, 放在宾语补足语之前。 e.g. I think it no use arguing with him. 我认为和他争吵没有用。 我认为和他争吵没有用。
4. 用作人称代词 代替前文提到的事物。 代替前文提到的事物。 e.g. The frog is not a warm-blood animal. It’s a cold-blooded one.
高中英语Unit3 it的用法Ⅰ课件新人教版选修6
02 课后训练
Ⅰ.句型转换(用 it 作形式主语) 1．We all knew that they had broken their promise. →_I_t_w__as__k_n_o_w_n_t_h_a_t _________ they had broken their promise. 2．If you want to give up smoking in a short time, it will be difficult. →__I_t _is_d_i_f_fi_c_u_lt_t_o_g_i_v_e_u_p_______ smoking in a short time. 3．Since you have spilt your milk, crying over it is useless. →__I_t'_s _u_se_l_e_ss_/_n_o_u_s_e___________ crying over spilt milk. 4．He has made up his mind. You needn't try to persuade him. →_I_t_'s_n_o_t_n_e_c_e_s_sa_r_y_________ for you to try to persuade him.
me how to use the computer. 4．The doctor thought ______it________ better for you to have a
holiday than to keep on working.
5．It never occurred to me _____t_h_a_t ______ you could succeed in persuading him to change his mind.
人教课标版高中英语选修6 Unit3_单元语法详解
Unit3 单元语法详解“it”的用法一、代词it1. 代替前文提到的事物。
如：——Where is the dog?-It's in the bedroom. ——狗在哪?——在卧室里。
2. 指性别不明的婴儿或不明确身份的人。
如：There is a knock on the door. It must be the postman.有人在敲门，一定是邮递员。
3. 代替指示代词this，that。
如：——What's this?——It's a new machine. ——这是什么？——是一种新机器。
二、it 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. 是某人该做某事的时候了It's(about/high）time+that从句某人该做某事了（从句谓语用一般过去时）It's the first(second)time+that从句某人第几次做某事（从句谓语用现在完成时）It's+时间段+since从句自从……有多长时间了It will be/was+时间段+before从句过多长时间才……(1）It is the first time that I have been here.这是我第一次来这儿。
(2）It is three years since the war broke out.自战争爆发以来有三年了。
(3）It will be half a year before I come back.还得再过半年我才能回来。
三、it用作形式主语当不定式、动名词、从句等复杂成分用作句子主语时，为保持句子平衡，通常把真正的主语后置，而在句首使用形式主语t。
如：(1）It's unknown when he will come.他什么时候来还不知道。
人教版高中英语【选修六】[知识点整理及重点题型梳理] it的用法(1)
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人教版高中英语选修六知识点梳理重点题型（常考知识点）巩固练习it的用法（1）概念引入小词it是我们学英语之初就学会的，是不是感觉它似乎有点无所不能，经常出现呀？那么我们是不是已经了解了it的用法了呢？本单元和下单元我们就把it的用法做一小结。
先看这些句子，想想it的用法是什么？1. It is a beautiful day here and I am sitting under the big tree at the end of the garden.(表天气)2. It seems amazing that at my age I am still fit enough to cycle 20 kilometres in anafternoon.(代替that从句作主语)3. It’s my birthday in two weeks’ time and I’ll be 82 years old!(表时间)4. Your mother tells me that you started smoking some time ago and now you are finding itdifficult to give it up.(第一个it代替to give it up作宾语；第二个it代替上文中“吸烟”的事) 下面我们就先学习it作为代词和形式主语、形式宾语的用法。
用法讲解代词it1. 作人称代词人称代词it是有实义的，是单数第三人称代词。
主格与宾格相同。
1）指代人以外的一切生物或事物，如前文提到的事物或未指明但谈话双方都知道的那件事；Ningbo is a beautiful city, isn’t it? 宁波是座美丽的城市，是不是？It doesn’t matter. 没关系。
2）替代前文中的this, that；This is your plan? Will you hand it in? 这是你的计划？你要交上去吗？3）指代婴儿、小孩或性别不明的人。
人教版本高中英语选修六Book6Unit3Grammar“it”的用法一
高中英语学习资料madeofjingetiejiGRAMMAR“it”的用法（一）【概括】it的用法好多，本单元我们主要学习它的基本用法以及它作形式主语或形式宾语的用法。
1.用作人称代词，指代上文提到的事物、动物、性别不明或没必需知道性其他人。
如：“Where’syourcar?”“It’sinthegarage.”Herdogwashowlingatthedoor,soheletitin.Thebabynextdoorkeptmeawake.Itcriedallnight.用作非人称代词，用来指代时间、日期、地址、天气、温度、距离、环境、状况等。
如：Itwas4o ’clockandthemailstillhadn’tcome.It’squitewarmatthemoment.It’sover200milesfromLondontoManchester.It’sgettingverycompetitiveinthecarindustry.3.用作形式主语，真实的主语常为不定式（短语）、动词-ing形式（短语）或名词性从句。
如：It’s impossibleforustogetthereintime.It’salwayssadsayinggoodbyetosomeoneyoulove.It’sstrangethatshenevermentionedthewedding.4.用作形式宾语，真实的宾语常为不定式（短语）、动词-ing形式（短语）或名词性从句。
如：Manypeoplefindithardtostopsmoking.Shefindsitboringstaying/tostayathome.Ifinditstrangethatshedoesn ’twanttotravel.【辨析】it,one和that1.it指物时，是明确指上文提到的那个事物。
it能够取代单数可数名词、不行数名词及前方提到的事情或状况。
选修六book6unit3grammar-it用法
s+v+it+ adj/n + to do/that…
我认为不浪费粮食是我们的责任。 _I _th__in_k__it__o_u_r_d_u_t_y_n_o_t__to__w_a_s_t_e_f_o_o_d__.
It + be + 过去分词 + 主语从句
注意：常见的过去分词有believed, expected, reported, said, shown，如果主句中的过去分词是表示请求，建议，命令等词如： suggested/ ordered / demanded /insisted / commanded... 等时 that 后的从句要用虚拟语气（should + 动词原形），should 可 以省略
If you can answer correctly, I will give you the thumbs-up .
为你点赞
The group getting the most thumbs-up will be the winner.
积赞最多
A riddle (谜语) Guess who I am . The answer is __?__. 代词我， 本意它， 即可指这又指那；
Unit 3 A healthy life Grammar：The usages of it
一.基本用法: it 做代词
1.用作人称代词，代替前面提到的人（不明确的）或 物,也可以指动物或婴儿.
选修六_Unit_3_Grammar-It_用法
It is suggested that the meeting ( should ) be put off. It was ordered that we ( should ) arrive there in two hours.
It is + n. (a pity, a shame, no wonder ... ) +that ...
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.
It worries sb. that…… 某事使某人担心
take it for granted that…
keep it in mind that…
认为…理所当然的
把…记在心里…
We owe it to you that we finished the work on time. I leave it to your own judgment whether you should do it.
It is a pity that he is ill. 他生病了，真遗憾！
It takes sb. some time to do sth.
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.
It’s about an hour’s drive from here to Nanchang.
高二英语人教版选修六第三单元语法讲解 +答案
Book6 Unit3 A healthy life语法：it 用法一、代词1.人称代词it 用来指代上文所提到的事物，或代替整个句子或该句中谓语部分所表示的意思:①---What do you think of the movie? ---It’s one of the best movies that I’ve seen.②You saved my life; I’ll never forget it.③Tom’s mother kept telling him that he should work harder, but it didn’t help.2.指代婴儿或儿童;在不清楚某人性别时,也可使用it,尤其在问答的形式中更为常见.例如:①---Who’s the lovely baby? ---It’s Mr. Black’s.②---Look, someone is coming. Who can it be? ---It may be the headmaster.1)I was cooking in the kitchen when someone knocked at the door. ___ was my close friend, Lisa. 3.还可以替代指示代词this 或that. ---What is that? ---It is his dictionary.2)This is the first time that I have come here, ____ ?(反义疑问句)4.用来表示时间, 天气, 气候, 距离, 温度, 环境, 季节, 价钱, 状况，次数等。
①It's awful—I've got so much work I don't know where to start.（笼统状况）②How is it going?③It was very noisy outside now.(表示环境)3)was a sunny day. Now__ was eight o’clock. They decided to go for a walk to the park, though __ _was two miles away. ___ was so comfortable to walk on the street _____ was quiet there. Suddenly ___ began to rain. They found __ hard to go home. When they got home, they were wet through. Thus ___ was a day that they would never forget.4)从这到我们家大约半小时的车程。
人教版英语选修6Unit 3 it的用法
④He was badly hurt, and
made his mother worry a lalk loudly in public places.
⑥I believe it no use
(read) without understanding.
答案：①it ②it ③It ④it ⑤It ⑥reading
答案：it
difficult to rescue the people trapped under the
课前语法感知
课堂合作探究
课后演练提能
答案
5．The Parkers bought a new house but before they can move in.
答案：it
will need a lot of work
课前语法感知
课堂合作探究
课后演练提能
④我发现让人们笑比让他们哭更难。
I
to make people laugh than to make them cry.
⑤我们都想当然地认为米勒能成功。
We all
that Miler could succeed.
⑥如果你及时打回来电话我会很感激的。
I would
答案：it
a point to attend those meetings
课前语法感知
课堂合作探究
课后演练提能
答案
4．(2015·北京高考)Once the damage is done, years for the farmland to recover.
答案：it
will take many
课前语法感知
课前语法感知
课堂合作探究
人教版 高中选修六第三单元语法it的用法(1)
人教版高中选修六第三单元语法it的用法(1)人教版高中英语选修六的语法武汉市新洲区新洲二中英语组张元利人教版高中英语选修六的语法It’s 10:08 It weighs only 3 kilosIt’s lovely It’s a large sum of money人教版高中英语选修六的语法It was a sunny day. Jack wanted to make an ____ appointment with Rose. They decided to go for a it was two miles walk to the park, though _____ It was comfortable to walk on the street. away. ___人教版高中英语选修六的语法it it Suddenly ___began to rain. They found __ hard to walk there. Then they took a bus home. Unfortunately ___ it went wrong. When they got home, they were wet through. Thus ___ it was a day that they would never forget. 人教版高中英语选修六的语法学习纲要The Usage 形式主语 of 形式宾语“it” 固定用法基本用法三个句型常见用法特殊用法三个句型人教版高中英语选修六的语法1.基本用法:1.it作人称代词1.1.it的最基本用法是作人称代词，主要指刚提到的事物，以避免重复: 1.2.也可以指动物或婴儿(未知性别的婴儿或孩子): 1.3.也可指抽象事物:人教版高中英语选修六的语法1.基本用法:2.非人称代词it2.1.指天气：2.2.指时间:2.3.指环境:3.作指示代词:可用来代替this ,that.BACK人教版高中英语选修六的语法学习大纲that 从句——虚拟语气… possible It is / was + adj. necessar y + ( for sb. ) to do sth. / clause 逻辑主语的特性important (of sb.) … … that 从句——虚拟语气 one’s duty It +is /was + n. a pity + ( for sb. ) to do sth. / that an honour … … said/reported/noticed It is / was p.p + that-clause suggested/ordered that 从句——虚拟语气…2. it 用作形式主语人教版高中英语选修六的语法2. it 用作形式主语2.1 作形式主语替代不定式1). It takes sb. ... to do sth. ;做...要花费某人..;2). It is kind ( of sb. ) to do sth.3). It is necessary ( for sb. ) to do sth4).It +is /was + a pity ( for sb. ) to do sth.人教版高中英语选修六的语法2. it 用作形式主语2.2.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 ),no fun, useless,a waste of time d+doing sth.It is no good learning English without speaking English.人教版高中英语选修六的语法2. it 用作形式主语2.3 代替主语从句 1)It is + adj. +that从句① It is clear ( obvio us,true,possible,certain....) that .....“清楚(显然，真的，肯定...)” ②. It is important ( necessary,right,strange,natural...) that ...人教版高中英语选修六的语法2. it 用作形式主语2)It is +v-ed +that 从句① It is said (reported, learned....) that ... 据说(据报道，据悉...)“。
语法： it用法(一)作形式主语、形式宾语;词汇：选修6(Unit3)中的重点词句与表达
In fact, to keep order in an important football match In fact, it is a hard job for the police to keep order in addicted to smoking It is easy to become addicted to smoking .spilt milk (it is no good crying over spilt milk. (覆水难收)age I am still fit it’s no use/no good doing; it’s worth doing 等It is amazing that at my age I am still fit .It It is no __ arguing with Bill because he will never change his mind. (2006,In In factin an important football match. (2001weather afternoonWord: abuse, stress, due to, tough, mental, effect, desperate, disappointed; prejudice, judgmentPh t d t ddi t d t i it f t k Phrases: accustomed to, addicted to, in spite of, take risks(a risk), at risk, get intoabuse['bju z]vt&n abuse [əbjuːz] vt. & n. 滥用Williamshishis friends.stress[stres]vt强调加压力于&nstress [stres] vt.强调，加压力于& n. 压力, 重要性be due to 由于I think my long life must be due to the healthy life. 同义：because, owing to, thanks tobe accustomed to 习惯于to make yourself or another person become used to a situation or place accustom yourself to somethingIt took a while for me to accustomrules and regulations.be accustomed to (doing) sth.be familiar with sth.become/ grow/ get ~ to sth.Her eyes quickly became accustomed todesperate, disappointedmentalbe addicted to sth.take risks(a risk) 冒险()in spite of (despite, although, though) p尽管(p 语法：it 做形式主语、宾语词汇：Unit3：A healthy life。
人教版高中英语选修6 Unit3 Grammar and Writing专题课件
3．动词(短语)＋it＋that/when/if ... 常用在此结构中的动词(短语)有： enjoy, like, love, dislike, appreciate, hate, prefer, ask for, answer for, see to, depend on, insist on等。 See to it that the goods are kept well. 注意这些货物要保存好。 I like it when the weather is fine in autumn. 我喜欢秋高气爽的天气。
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it的用法(Ⅰ)
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一、it用作代词 1．it作非人称代词，常用于指代时间、距离、自然现象、
量度、价值等。 It’s time to get up.(指时间) 到起床的时间了。 It’s going to snow.(指天气) (天)要下雪了。 It is a long way from my school to the hospital.(指距离) 从我的学校到医院(距离)很远。
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假如你是李华，你跟你的朋友Paul聊天，他表示学习压力很大， 请你给他写封信，给他提一些建议。 1．将自己的问题告诉老师和同学，请求得到他们的帮助。 2．不要总想着考试成绩，要多想想自己在哪些方面进步了，这 样就会给自己自信。 3．多做运动，运动可以帮助自己缓解压力，并且有助于睡眠。 4．你对他的祝福。 要求：1.文章必须包括以上所有内容，并根据需要，适当发挥。 2．词数：120左右。
/hoped/suggested/expected, etc. that ...
It is reported that 22 people were killed in the grassland
人教版高中英语选修六Unit3-Gramma---it用法总结
1.2.也可以指动物或婴儿(未知性别的婴儿或孩, it isn’t.
1.3.也可指抽象事物: It was a great surprise to me when he did a thing like that．
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2.非人称代词it
it有时并不指具体的东西，而泛指天气、时间、环境等， 称为非人称的it： 2.1.指天气：
that he 2021/6/7 would never forget.
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㈡.引导词it 1. It is + 被强调部分 + that ...
使用该句型有以下几点请注意： ① 强调句的谓语is或was永远用单数.
It was yesterday that I met your father in the street．
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It’s 10:08 It weighs only 3 kilos
It’s lovely It’s a large sum of money
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1.It’s a small world after all. this/that 2.A bird landed on the tree. It's singing. 3.It’s a fine day, isn't it?
②不管被强调部分是哪种状语，只能用that 连接，不得使用where、when等连词.
It was in the street that I met your father yesterday．
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③被强调部分为人时，可用who(主格或宾格)和 whom(宾格)代替that，用that也行。
高中英语人教版选修六Unit3AhealthylifeGrammar：it的用法(Ⅰ)
高中英语人教版选修六Unit3AhealthylifeGrammar：it的用法（Ⅰ）学校:___________姓名：___________班级：___________考号：___________一、句型转换句型转换。
在空格处填上适当的单词，使上下两句话句意一致。
（每空一词）1． To my surprise, he thought that it was impossible for him to learn English well.→To my surprise, he thought _______ ___________ for him to learn English well. 2．36 students are said to have passed the exam in our class.→_______ _______ _______ ________ 36 students passed the exam in our class. 3． To give up smoking is not easy.→______ ______ not easy to give up smoking.4．Arguing about it is useless.→______ ________ useless arguing about it.5． I became stronger and stronger, which made my parents glad.→I became stronger and stronger, and ________ _______ _______ _______ _________.6． He felt it was his duty to serve the customers heart and soul.→He felt ________ _______ _______ to serve the customers heart and soul. 7． In the west, people send Christmas presents to their relatives and friends, making it a rule.→In the west, people ________ _______ _______ _______ to send Christmas presents to their relatives and friends.8．When and where to hold the match hasn’t been decided.→________ _______ _______ _______ when and where to hold the match.9．In my opinion, to finish our work in a week was difficult.→I found _______ _______ to finish our work in a week.10．We met each other two weeks ago.→_____ _______ ________ _______ _______ since we met each other.二、阅读选择阅读理解。
高中英语32Grammar课件新人教版选修6
语法指南 一 二 三 四 五
8.指价值: —What’s the cost of your new watch? ——你的新手表多少钱? —It is 150 yuan.——150元。
语法指南 一 二 三ຫໍສະໝຸດ 四 五三、it做形式主语 替代做主语的从句、动词不定式、动词-ing形式,而把真正做主 语的从句、动词不定式、动词-ing形式置于句尾。 1.替代做主语的动词不定式,其句型为: (1)It+be+adj.+(for sb.)to do sth. 此处的形容词通常为描述事物的形容 词:easy,difficult,hard,necessary,unnecessary,possible,impossible,likely, unlikely,right,wrong,important,unimportant,legal,illegal,wellmannered,illmannered,polite,impolite,clear,obvious,certain,suitable,proper,fit,usefu l,useless,dangerous... It is illegal to drive a car without a license. 无证驾驶是非法的。
语法指南 一 二 三 四 五
(2)It+be+adj.+of sb.to do sth. 此处的形容词通常为描述人的性格、品质的形容 词:kind,unkind,nice,rude,cruel,considerate,thoughtful,thoughtless,care ful,careless,silly,foolish,stupid,clever,wise,crazy... Whenever you are greatly tempted to do something,it is wise of you to think twice before going about it. 每次当你很想做某事时,明智的做法是三思而后行。
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Section_ⅢGrammar—it的用法(1) 语法图解探究发现①It is a beautiful day here and I am sitting under the big tree at the end of the garden.②Your mother tells me that you started smoking some time ago and now you are finding it difficult to give it up.③It is never too late to mend.④It is no use talking to them.⑤It is said that he stole the money.⑥I think it difficult to learn English well.⑦We make it clear that speaking to the teacher in that way is not polite.⑧I don't like it when people talk with the mouth full of food.[我的发现](1)①句it表示天气，②句第一个it代替to_give_it_up作形式宾语；第二个it代替句中所说的“吸烟”的事。
(2)在句③④⑤中it用作形式主语，其中句③用在“It is＋形容词＋(for/of＋sb.)＋动词不定式(短语)”中，it指代动词不定式(短语)；句④用在“It is＋no use/good＋动名词(短语)”中，it指代动名词(短语)；句⑤用在“It is＋said/believed/reported＋that从句”中，it指代that 从句。
(3)在句⑥⑦⑧中it用作形式宾语，其中句⑥用在“动词＋it＋形容词＋动词不定式(短语)”中，it指代动词不定式(短语)，句⑦用在“动词＋it＋形容词＋that从句”中，指代that 从句；句⑧it用在某些特殊的句式中，指代when从句。
一、it用作人称代词和非人称代词1．用作人称代词(1)it用来指代前面的名词或前面提到过的事。
My friend offered me a beautiful gift yesterday, and I like it very much.我朋友昨天给了我一件漂亮的礼物，我非常喜欢。
(2)指代性别不明的child或baby。
His sister has given a birth to a baby recently and it is very beautiful.他姐姐最近生了个孩子，很漂亮。
(3)指代未出场的身份不明确的人。
—Who is waiting for you at the bus stop?—I have no idea.It may be my brother.——谁在车站等着你？——不知道，可能是我哥哥。
(4)替代前文中的this, that。
This is your plan? Will you hand it in?这是你的计划？你要交上去吗？2．用作非人称代词it用作无人称的主语，不指物，而表示时间、天气、气候、季节、距离等自然现象，或指事物的状态。
It is a fine day today, isn't it?今天是个好天气，对吧？It is five kilometers to the town from the village.从农村到城镇有10里路。
It's ten o'clock.十点钟了。
[即时演练1]匹配下面it的用法A．指代前面的名词B．指代性别不明的child或babyC．指代未出场的身份不明确的人D．时间E．距离①—Who's that at the door?—It is the milkman. __C__②Qingdao is a beautiful city, isn't it?__A__③The baby is crying. It might be hungry. __B__④What a long way it is from Beijing to London! __E__⑤It was nearly midnight when she came back. __D__二、it用作形式主语it常代替由不定式、动词的-ing形式或从句表示的真正主语，作形式主语，而将真正的主语移至句子的后面。
1．代替不定式短语作形式主语It is impossible to get there by boat.坐船不可能到那里。
It's very kind of you to help me.你帮助我真好。
2．代替动名词短语作形式主语常用于以下结构中：It's no use/no good/no fun/useless/a waste of time doing sth.做某事没有用/没有好处/没有意思/没有用/浪费时间。
It is no use giving him some advice.＝It is useless giving him some advice.给他提建议没用。
3．代替主语从句作形式主语It is necessary that the work should be done well.这项工作应该被完美完成是必须的。
It's a pity that I didn't think of it earlier.我没有早一点这么想真是遗憾。
4．注意以下固定句型It seems(ed)/appears(ed) that ...似乎……It (so) happened that ... 碰巧……It turns(ed) out that ... 结果是……It occurred to sb. that ... 某人突然想起……It is said/reported/believed/hoped/well-known/suggested ... that ...据说/据报道/大家都相信/人人都希望/大家都知道/有人建议……It so happened that the tickets were sold out.碰巧票都卖光了。
It occurred to her that she might adopt a homeless child.她突然想到她可以收养一个无家可归的孩子。
It turns out that the situation is quite serious.结果表明情况很严峻。
[即时演练2]补全句子①(2015·四川高考满分作文)I badly need to improve my oral English, so it_is_great_for_me_to_find a native speaker to learn from.我急需提高我的英语口语，因此对我来说找到一个可以向他学习的当地人真是太好了。
②(2014·重庆高考满分作文)It_is_true_that a smartphone plays an important role in our daily life.真的，智能手机在我们日常生活中扮演重要的角色。
③It_is_no_use_trying to solve the problem by force. Peace talks are the only solution.试图用武力解决问题是没用的，和谈才是唯一的办法。
④It_was_said_that the typhoon had caused a lot of damage.据说台风已造成了很多的破坏。
三、it用作形式宾语it常可代替不定式(短语)、动名词(短语)或从句在句子中作形式宾语，而将真正的宾语放在句子后面，it作形式宾语常用于以下几种情况：1．动词＋it＋形容词/名词＋(for/of)＋to do/从句They considered it important to have the work done on time.他们认为按时完成这项工作很重要。
We make it a rule to visit the old every weekend.我们规定每个周末都去拜访那些老人们。
2．动词＋it＋no good/no use/useless/a waste of time/worth one's while等＋doing ...I'll make it worth your while telling me about his secret.告诉我他的秘密，我会酬谢你的。
He thought it no use trying to convince them.他认为企图说服他们没有用。
3．动词＋it＋介词短语＋that ...多亏医生的照料，他身体又好起来了。
4．动词appreciate/hate/love/like/dislike后面接if 或when引导的从句作宾语时，中间需用形式宾语it，构成“appreciate/hate/love/like/dislike＋it＋if/when从句”。
He will appreciate it if they will invite him.如果他们邀请他，他将非常感激。
She hates it when he bragged that he was the most important.她讨厌他自吹自己最重要。
[即时演练3]补全句子①First of all, I think_it_very_important_to_make_more_friends abroad.首先，我认为在国外多交朋友是非常重要的。
②(2014·山东高考改编)Susan made_it_clear_to_me_that she wished to make a new life for herself.苏珊明确向我表明，她想为自己谋得一份新生活。
③(2014·陕西高考改编)I'd_appreciate_it_if you could let me know in advance whether or not you will come.如果你能让我提前知道你是否能来，我会很感激的。
④I think_it_no_use_arguing with him.我认为和他争论是没有用的。
⑤We all take_it_for_granted_that Mile can succeed.我们都想当然地认为米莱能成功。