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1、1.很明显很明显，这项，这项工作很适合工作很适合Tom。2.据报道，几天前清远下雪了。据报道，几天前清远下雪了。3.正是这个学者和我们交流了他的想法。正是这个学者和我们交流了他的想法。4.我们都承认今天很冷。我们都承认今天很冷。5.我认为在公共场合犯这样一个错误是令人尴尬的。我认为在公共场合犯这样一个错误是令人尴尬的。It is evident that the job is appropriate for Tom.It is reported that it snowed in Qing yuan several days ago.It was the scholar that/who ex
2、changed his ideas with us.We all admit that it is very cold today.I think it embarrassing to make such a mistake in public.Grammar The use of“it”（1）it做形式主做形式主语和和宾语强调句强调句含有含有it的句型的句型上文提到上文提到的事物的事物表示时间，天气，表示时间，天气，距离距离，环境等，环境等指动物、婴儿和未确定身份的人指动物、婴儿和未确定身份的人It is+adj.+thatIt is+adj.+(of/for sb.）to do sth.I
3、t+be+-ed+thatIt+be+n.+thatIt is/was+被强调部分被强调部分 +that+其他其他eg.It is(high)time that.指代指代sb.thinkit+n./adj.to do/that clause01020304代替上文提到的人和物代替上文提到的人和物指代婴儿、小孩或不知性别的人指代婴儿、小孩或不知性别的人用用 it替代替代 this/that泛指泛指（天气，距离，时间，（天气，距离，时间，季节季节等）等）Who is the boy?It is my son.Pass me your pen.Here it is.The baby is cryin
4、g.It might be hungry.Someone is ringing.Who might it be?What is this?It is a book.It is getting colder and colder.It is a long way to Beijing.考考你考考你What is“it”used to talk about?一一、指代、指代 It It 作形式主语，作真正主语的是作形式主语，作真正主语的是_,_,_It is no good eating too much before sleeping at night.It is obvious that he
5、 is addicted to playing mobile games.It is necessary to appeal to more people to participate in the activity.to dodoinga clause二、二、It It 作形式主语作形式主语it做形式主语做形式主语It is+adj.+thatIt is+adj.+(of/for sb.）to do sth.It+be+-ed+thatIt+be+n.+that二、二、It 作形式主语作形式主语1.It is+adj.+that可用于此句型的形容词有：可用于此句型的形容词有：_等。等。It
6、is obvious that he is addicted to (playing)computer games.很明显，他对电脑游戏上瘾了。很明显，他对电脑游戏上瘾了。important,necessary,surprising,possible,obvious2.It is+adj.+(of/for sb.）to do sth.形容词表示形容词表示事物的特点事物的特点时，如：时，如：difficult,important,easy,impossible,necessary,hard等，用等，用for.你收养这个无家可归的孩子，真是太好了！你收养这个无家可归的孩子，真是太好了！戒烟对他来说
7、是很难的。戒烟对他来说是很难的。It is very hard for him to quit smoking.It is kind of you to adopt the homeless child.形容词表形容词表人的性格特征人的性格特征时，如：时，如：nice,good,kind,rude,brave,careful等，用等，用of。3.It+be+-ed+that适用于该句型的过去分词有：适用于该句型的过去分词有：（1）said,reported,hoped,thought,believed,predicted等。等。It is hoped that you can make gre
8、at progress in the coming final exam.希望你们能在即将到来的期末考试中取得巨大进步。希望你们能在即将到来的期末考试中取得巨大进步。It is said that he succeeded in passing the interview.3.It+be+-ed+that(2)适用于适用于该句型的过去分词有该句型的过去分词有：It is required that every participant（should）arrive at the lecture hall on time.建议你不要冒险逗弄那只小狗。建议你不要冒险逗弄那只小狗。It is sugge
9、sted that you(should)not risk teasing the dog.ordered/demanded/insisted/.4.It+be+n.+that适用于该句型的名词有：适用于该句型的名词有：It is a pity that you missed the sports meeting last week.It is an honor that I was appointed as librarian in our school.我被任命为我们学校的图书馆馆长，这是一种荣幸我被任命为我们学校的图书馆馆长，这是一种荣幸。a pity,an honor,a surpri
10、se,ones duty等。等。5.It is+n.+doing sth.no good,no use,a waste of time.适用于该句型适用于该句型的名词有：的名词有：It is no use complaining once you lose the chance.一旦你失去这次机会，抱怨是没有用的。一旦你失去这次机会，抱怨是没有用的。Practice1.Is _ necessary to complete the design before New Years Day？2._ is no good _(talk)without doing anything.3.Does _ m
11、atter if he cant finish the job on time?4.I was disappointed with the film.I had expected _ to be much better.5._is a fact that English is being accepted as aninternational language.6._ is reported in the newspaper,talks between the two countries are making progress.It is reported in the newspaper t
12、hat talks.itIttalkingititItAs形式宾语形式宾语 2)I think it no use crying over spilt milk.3)I have made it clear that students are banned from bringing cellphones to school.1)I find it easier to say than to do.it 作形式宾语，真正的宾语是作形式宾语，真正的宾语是_,_,_.that clauseto dodoing主语主语+think+it+_或或_+_ _ _.considerfindmakebeli
13、eve.n.adj.that-clause v-ing to do sth.I think it best that you should do more exercise.He found it difficult to accustom himself to getting up early.She thought it no use arguing with the man.We made it a rule that the office should be cleaned by turns.Practice1.We make _ a rule that you must be qui
14、et when you enter the classroom at 6:15 p.m.2.I think it necessary _(have)a better understanding of the use of it.3.Finally he found it a waste of time _(play)computer games for a long time at weekend.4.I would appreciate _if you could take my application into consideration.itto haveplaying it 1.我认为
15、积极参加小组活动是我的责任。我认为积极参加小组活动是我的责任。I think it my duty to take an active part in the group activity.2.这个化学家发现用这个方法解决这个问题是没有用的。这个化学家发现用这个方法解决这个问题是没有用的。The chemist found it no use solving the problem in this way.3.我相信你在学期末实现目标是可能的。我相信你在学期末实现目标是可能的。I believe it possible that you can achieve your goal at the
16、 end of the term.今天是十二月二十一号。正是在一个月后我们将举行期末考试。我们都认为取得好成绩对我们来说是很重要的，因为我们都想过一个开心的寒假。据说我们将迎来最长的寒假，这个消息使每个人都很激动。希望每个人都能取得更大的进步。Group WorkGroup Work Today it is December 21st.It is in a month that we will take the final exam.We all think it important for us to get good marks,because all of us want to enjo
17、y a happy winter vacation.It is said that we will have the longest winter vacation,which makes everyone excited.It is hoped that everybody can make greater progress.IMaryin the streetyesterdayIt was I that/who met Mary in the street yesterday.It was Mary that I met in the street yesterday.It was in
18、the street that I met Mary yesterday.It was yesterday that I met Mary in the street.强调句强调句结构：结构：It is/was+被强调部分被强调部分+that/who+句子其他成分句子其他成分I met Mary in the street yesterday.1.被强调的部分不能为谓语动词被强调的部分不能为谓语动词.3.强调的部分是人强调的部分是人 也可用也可用who,其其它一律用它一律用that.He didnt realize the importance of health until he fell
19、ill.直到生病了，他才意识到健康的重要性。直到生病了，他才意识到健康的重要性。It was not until he fell ill that he realized the importance of health.Not until he fell ill did he realize the importance of health.Inversion It is not until that 直到考试不及格，Tom才下定决心努力学习。（强调句）It was _that _.not until he failed in the exam Tom made up his mind to
20、 study hard1.It was yesterday _ Mr.Peng encouraged us to make good preparations for the final exam.2.It was because he paid little attention to his English study _ he didnt get a good mark in the mid-term exam.3.It was Wang Ruowei _ set a good example for us in study.4.It was playing computer games_
21、 cost the boy plenty of time_ he ought to have spent doing his lessons.that/whothatthatthatwhenIts difficult to give up smoking.2.Most people believe that smoking causes cancer.3.Trying to make him give up smoking is no use.1.Giving up smoking is difficult.It is believed that smoking causes cancer.It is no use trying to make him give up smoking.Rewrite the sentence by using“it”口诀：代词 it 本意它,既可指这又指那;时间天气均可指,谈到距离也用它;假主假宾均可做,强调句型跟that。Summary