it用法公开课课件.ppt

it,Discussion,What jobs can “it” do?,It 用法归纳一、 指代it二、 形式it三、 强调it四、 含有it的短语、谚语,Look at the picture. _ is a picture of our school.,It,一、 1.用作人称代词, 代表前面提到的人或事物.,My pen is missing. I cant find_ anywhere.,it,-Is this jacket yours?-Yes, _ is.,2.用于代替指示代词this 和that。,it,3.用以表示时间、距离、天气、季节、环境等.,. Its 10:08.Its only half an hours walk from here to our school.3) It is sunny today, isnt it?4) Its spring now.5) Its quiet here.,Time,Distance,Weather,Season,Circumstance（环境）,4、可以用来指动物、婴儿和未确定身份的人。 Who is it?,Its lovely.,It weighs only 3 kilos.,二形式it- 形式主语， 形式宾语,It is vital for all of you to have a good command of English.,你们掌握英语是至关重要的。,形式主语,To have a good command of English is vitalfor all of you.,1. 代替动词不定式做主语,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, necessary, important, possible, useful, useless,vital（至关重要的）, essential（必要的）.,Make sentences:,1.我们保持自然界的平衡是有必要的。,It is necessary for us to keep the balanceof nature.,2.在日常生活中练习你的英语口语是非常重要的。,Its very important for you to practise your oral English in daily life.,你让我们做这些练习是明智的。,It is wise of you to let us do these excises.,It's kind of you to help me work out the problem.,2) It be adj. of sb. to do sth.此处adj. 通常为描述人的形容词: kind, , nice, rude, polite, cruel, considerate（细心的）, thoughtful, careful, careless,foolish, stupid, clever, wise.,你能帮我，真好。,Its very kind of you to help me.,Its very nice of you to offer me a seat.,给我让座，您太好了！,Make sentences:,3It + takes、took ( sb. )+ 时间/金钱/精力等+ 动词不定式,It took me much time to edit（编辑） this powerpoint.,说实话需要很大的勇气。,It takes great courage to tell the truth.,成功需要付出极大的努力。,It takes great efforts/pains to succeed.,Its no good/ use/pleasure doing做没益处，没用，没趣,2. 代替动名词做主语,It is no use crying over spilt milk.,只阅读不理解没什么益处。,It is no good reading without understanding .,It is possible that we will realize（实现） ourdreams one day.,3. 代替主语从句作形式主语,1)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)”, 是主语从句最常见的一种结构。,It is adj. + 从句,显然，手机给我们带来了许多好处。,It is clear that cell phones have brought us a lot of benefits.,It is necessary that you (should) remember the 3500 words.,2) It is important ( necessary， strange， natural, surprising.) that . that 后的从句中要用虚拟语气（should + 动词原形。,我们用有效的方法学习很重要。,It is important that we should learn in an effective way.,It is said that he has a secret weaponin maths learning.,It is said (reported/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 v-ed that,人们相信健康比财富更重要。,It is believed that health is more importantthan wealth.,It is a shame that our city has been underthe shadow of smog these days., It is + noun + 从句,It is a pity (a shame /an honor /a fact /a surprise/. ) that . 很遗憾/可耻的是/很荣幸,很遗憾你不能来参加这个派对。,It is a pity that you couldnt come to theparty.,我很荣幸被邀请参加你的生日聚会.,It is an honor that I was invited to your birthday party.,It happens (seem,appears,  turns out , )等不及物动词+that. 碰巧.看来结果证明. It seemed that he didnt tell the truth.It happened that I was out when he called.,It is (high) time that . 从句应该用虚拟语气， 常用过去时态表示虚拟 有时也用should + 动词原形，should 不能省，常译为是（正是）的时侯,It is time that we should work hard.,It is high time that we should take action to deal with the environmental problems.,是我们采取行动解决环境问题的时候了！,形式宾语,动词+ it + 形容词/名词+（ for sb ）to do/doing + that 从句,think,believe, consider, feel, make, find,hard uselessimportantnecessarynatural/essential,no use/no good/a waste of time/our duty,I found it very interesting to study English.,形式宾语,I think it every ones duty to protect ourmother the earth.,I think it important that you (should) make a plan.,I have made it a rule that I will do some English reading every day. 规定，习惯于,我发现学英语很有趣。,我认为保护我们的地球母亲是每个人的责任。,我认为你制定一个计划很重要。,it作形式宾语的特殊句型,结构动词+ it + if/that/when动词有喜欢类：enjoy, like, appreciate, prefer 讨厌类：hate, dislike如果你能给我这个机会我将不胜感激。I would appreciate it if you can offer me the chance.I like it when my mother is happy.I hate it when people talk with their mouths full.,He took it for granted that he would pass the exam. Dont depend/rely on it that he will arrive on time. I owed it to Tom that I found the job I wanted.,想当然地认为,指望,把什么归功于某人,They made a vow（誓言） of love in front of the huge stone in 2005 .,三.强调句型,It + be+被强调部 + that/who(a person)其他部分,It was the couple that/who madea vow of love in front of the huge stone in 2005.,It was a vow of love that the couple made in front of the huge stone in 2005.,It was in front of the huge stone that theymade a vow of love in 2005.,It was in 2005 that,It was five oclock _ I got home.It was at five oclock _ I got home.,when,that,A that B when,It was not until she took off her dark glasses that I realized she was a famous film star. It is not until + that . 直到才,请指出下列句子的强调部分：,It is what we think that controls us.,四、it 常用的固定搭配,make itsucceed成功、搞定It was hard but I finally made it.2. take it easy 不要慌, 别担心。3. It all depends/that all depends. 那要视情况而定。4. It's up to sb. 这取决于你。,It is never too late to learn.,It's no use crying over spilt milk.,Strike the iron while it is hot.,高考链接,The scientists next research job was clear: Find out what in the fishs blood kept it from freezing. Their search led to some really strange thing made up of a protein (蛋白质) never before seen in the blood of a fish. When it was removed, the blood froze at seawater temperature.（2008辽宁）,70.What does the underlined word “it” in Paragraph 5 refer to?A. A type of ice-salt mixture. B. A newly found protein.C. Fish blood.          D. Sugar molecule(分子）.,B,阅读,1.Jane was walking round the department store. She remembered how difficult _31_ was to choose a suitable Christmas present for her father.(2009广东）,2.He asked his teacher, "Sir, the water was awful. Why did you pretend to like 38  ?“（2010广东）,语法填空,it,it,4.Will _ matter if you don't take your breakfast Recently a test were givenin the United Sates.,3. _ is known to all that the time we can use is limited. Therefore we should make full use of our time to study hard so as to serve our country in the future.,It,it,One day I wrote a little story and showed to my teacher .,改错,You wont find difficult to get to the city center.,it,it,Please make as many sentences as you can on environment by using “it” .,Activity,Thank you for listening!,