it用法公开课课件.ppt
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1、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.It
2、s 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
3、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 necessa
4、ry 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.,Its 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
5、, , 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
6、 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。,Itisnogoodreadingwithoutunderstanding.,It is possible that we will realize(
7、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
8、 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
9、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
10、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,turnsout,)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
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