人教英语选修六高二 unit 语法 Grammar— it的用法

1、Section_Grammar it的用法(1)语法图解探究发现It is a beautiful day here and I am sitting under the big tree at the end of the garden.Your mother tells me that you started smoking some time ago and now you are finding it difficult to give it up.It is never too late to mend.It is no use talking to them.It is said

2、that he stole the money.I think it difficult to learn English well. We make it clear that speaking to the teacher in that way is not polite. I dont like it when people talk with the mouth full of food.我的发现(1)句it表示天气，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)在句中it用作形式主语，其中句用在“It is形容词(for/ofsb

3、.)动词不定式(短语)”中，it指代动词不定式(短语)；句用在“It isno use/good动名词(短语)”中，it指代动名词(短语)；句用在“It issaid/believed/reportedthat从句”中，it指代that从句。(3)在句中it用作形式宾语，其中句用在“动词it形容词动词不定式(短语)”中，it指代动词不定式(短语)，句用在“动词it形容词that从句”中，指代that从句；句it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 beau

4、tiful 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th

5、is, 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, isnt 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。Its ten oclock. 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

6、间E距离Whos that at the door?It is the milkman. _C_Qingdao is a beautiful city, isnt it? _A_The baby is crying. It might be hungry. _B_What a long way it is from Beijing to London! _E_It 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

7、It is impossible to get there by boat.坐船不可能到那里。Its 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：Its 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 necess

8、ary that the work should be done well.这项工作应该被完美完成是必须的。Its a pity that I didnt 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/wellknown/suggested . that

9、 .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(2015四川高考满分作文)I badly need to improve my oral English, so it_is_great_

10、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。(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。It_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

11、。It_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.

12、我们规定每个周末都去拜访那些老人们。2动词itno good/no use/useless/a waste of time/worth ones while等doing .Ill 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 . owe it to sb. that .把归功于 take it for granted that . 想当然/认为是当然的 He

13、owes it to his doctors care that he is quite well again. 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/dislikeitif/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 mos

14、t important.她讨厌他自吹自己最重要。即时演练3补全句子First 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。(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。(2014陕西高考改编)Id_appreciate_it_if you could let me know in advance whether

15、 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。I think_it_no_use_arguing with him.我认为和他争论是没有用的。We all take_it_for_granted_that Mile can succeed.我们都想当然地认为米莱能成功。.单句语法填空1New technologies have made it easier to enjoy life than ever before. 2You may depend on it that they will look after your daughter when

16、 you are away.3From the teachers patient explanation, I have learnt what a big responsibility it is to educate us.4Have you got used to the weather here?Yes. But I dont enjoy it in the summer when it rains on end.5I need to buy a new cellphone badly but I cant afford it. 6I know it is important to k

17、now my own limitations, but what is difficult is to help others to know their own limitations.7I would appreciate it very much if you could give me some suggestions.8It is_known (know) to us that he is one of the most famous football players in the world.9It never occurred to me that you could succe

18、ed in persuading him to change his mind.10Will you see to it that my children are taken good care of while I am away?11It felt funny watching myself on TV.12There is still a copy of the book in the library. Will you go and borrow it?.单句写作1(2015江苏高考满分作文)It_is_everyones_responsibility_to_obey the rule

19、s to keep the society in order and peoples lives safe.遵守规则让社会保持秩序、人民生活安定是每个人的责任。2It_is_obvious_that iPad is of great help to our study, especially to our English listening.显而易见，iPad对我们的学习有很大帮助，尤其是对我们的英语听力。3It_is_wellknown_that learning English well will be of great benefit to us all.众所周知，学好英语对我们大家都大

20、有益处。4(2015江苏高考书面表达)Whats worse, some drivers, cyclists and pedestrians do not think_it_vital_to_obey traffic rules.更糟的是，一些司机、骑车人和行人认为遵守交规没有多么重要。5(2015重庆高考满分作文)I_would_appreciate_it_if you could tell me more about the activity.如果你能告诉我更多活动事宜，我将不胜感激。6I think_it_necessary_that we take plenty of boiled w

21、ater every day.我认为我们每天喝大量的开水是必要的。.语法填空Do you have sleeping problems? If so, then these tips may help you fall asleep fast.Set aside the thought _1_ you have to fall asleep. The more you think of it, the _2_ (hard) you will fall asleep.The foods you eat also play _3_ important part. Avoid eating or d

22、rinking things like chocolates, coffee, tea and energy drinks. If you have to, then have them in the morning and never in the afternoon, _4_ (especial) before going to bed. Dont eat too much at night. A full stomach will make it more difficult for you _5_ (fall) asleep because your body is working m

23、ore time to digest the food you ate.Make a _6_ (fix) time to go to bed. For example, by 9 oclock in the evening you should already be in bed. Do this even if youre not sleepy yet. Once _7_ (follow) this routine, you will gradually see that you feel _8_ (sleep) when its 9 oclock.Make your room comfortable for sleeping. Y