九年级级下Unit4 Natural disasters教学 grammar课件

1、 The special usa of “It”! Unit4 Grammar要点解读1.作人称代词和非人称代词的用法2. 作先行代词用法3. 作引导词的用法能力解读在正确运用it的基础用法上,重点掌握:作形式主语作形式宾语并能在所给题干提示的语境和逻辑关系中灵活运用.基本概念和用法 It 是一个特殊的代词，它有两重意义。一是作为代词，另一个是当作连接词(引导词)。它可以用来代替事物和前面提到过的事,也可以用来表示时间,天气等.还可以用作先行代词及引导次.具体用法作代词:1. 指代事物或前面提到过的事物:What is this ?It is a picture.It is a lovely

2、and cute panda, isnt it?Yeah. I wont forget it!2. 指代时间和天气How is the weather?It is rainy.Whats the time? It is twenty past two.3. 指代距离How far is it from your home to your school?It is only five minutes walk.4. 表示情况或代替this, that:How is it going on with the girl? It must go on with her very well. She i

3、s very happy.Whats this ? It is a cute dog. P55 A Answer these questions using it as the subject.Whats the weather like today?Whats the time now?What is the date today?What is the season now?How far is your home from school? P56 B Put the words in the correct order to make meaningful sentences.now/

4、for supper/ it/ time / isautumn/ in Australia/ now/ it/ isabout five kilometres/ it/ is/ to the parkwindy/ was/ it/ yesterdayIt is time for supper now.It is autumn in Australia now.It is about five kilometres to the park.It was windy yesterday.it作形式主语。英语中不定式、动名词、主语从句在作主语时主语往往显得很长，使整个句子看上去有点 头重脚轻，这样就

5、借助“it”来作形式上的主语，而把真正的主语移到句子后边去，使全句看上去平稳一些。 “it”没有实际的意义。 It + be+ adj. / n. +to do It is easy to climb the hill.It is his duty to solve the problem.2) It + be + no use / good + gerund (动名词)做某事是没用的。It is no using arguing with him.做某事是没好处的。I t is no good going there. 2.作形式宾语。这种情况通常只用于能带以名词或形容词作宾语补语的动词后面

6、。常用于下列句型:feel; think; make; find+it adj. / n. +to do E.g. I found it not easy to get on with Jim. We all think it important to learn English well.It 句型:1.It + is/was/ has been +一段时间 + since+过去时自从我上次见到他已经有两年了。 It is two years since I last saw him.我离开学校五年了。 It has been three years since I left the sch

7、ool.It 句型:2. It takes/took sb some time to do sth 花费某人多少时间做某事他们花了3年时间盖这栋大楼。 It took them 3 years to build the skyscraper.我用了三天读完这本书。 it took me three days to finish reading the book.3. It + seems / appears that好像。 好像不久有选举。 It seems that there will be an election soon. 看来要下雨了。 It appears that its goi

8、ng to rain. 4. It + be + done ( reported / said / told / known) + that 据报道、据说、据获悉。 据说他已经出国学习了。 It is said that he has studied abroad. 大家都知道这座大桥要提前完工。 It is well known that the bridge will be completed ahead of time. 1）It + be + for sb. + to do sth.做某事对于某人来说怎么样 如果不定式的逻辑主语是由for引起，主句中的形容词通常是表示重要性，紧迫性，频

9、繁程度，难易度等情况的形容词，常见的有：important, safe, common, difficult等。 做这项工作对我来说很难。 Its difficult for me to do this work.5. 2） It + be + of sb. + to do sth.某人做某事某人怎么样 如果不定式的逻辑主语是由of引起，主句中的形容词必须是能表示主语特征的形容词。常见的有：bad; brave; careless; clever; foolish 等，这个句型可以改写为：sb. + be + adj. + to do. 你这么说太好了。 Its kind of you to

10、say so.=You are kind to say so. C Write a sentence using it and a to-infinitive under each picture below.calm/stay/ fire/ importantIts important to stay calm in a fire.2. forest/ start/ fire/ dangerousIts dangerous to start fire in the forest.C Write a sentence using it and a to-infinitive under eac

11、h picture below.3. take/ umbrella/ good ideaIts a good idea to take an umbrella.4. have/ park/ picnic/ niceIts nice to have a picnic in a park.D Put the words in brackets in the correct order to complete the conversations.S1: Look at the sky. There are many dark clouds, and the wind is blowing stron

12、gly.S2: (it/ seems/a typhoon/ that/ coming/ is)2. S1: Is your father going to Beijing today?S2: No. (it/ appears/ has been cancelled/ the flight/ that)It seems that a typhoon is coming.It appears that the flight has been cancelled.D Put the words in brackets in the correct order to complete the conv

13、ersations.S1: Mary looks very sad.(it/ seems/ something bad/ her/ that/ has happened to)It seems that something bad has happened to her.一选择填空( ) 1.Have you seen my watch? Yes, _is on the desk.A. ItB. thisC. itD. that( ) 2. -I hear the Whites have a new baby. - Oh, is _ lovely?A. heB. sheC. theyD. it

14、( ) 3. - There is a knock at the door. _? - It is me.A. Who is he B. Who is that C. Who is it D. Who is sheCCD一选择填空( ) 4. What is the weather like today? _ is very hot, isnt it?A. it B. It C. Weather D. Its( ) 5. How far is _ from here to the railway station? _ about ten minutes walk.A. it; ItB . it

15、; Its C. It; It D. it; Its( ) 6. Is that a pen or a pencil? _ is a pencil.A. ThisB. ThatC. It D. TheyBBC( ) 7. What is the date today, the 18th or the 19th?Neither. _ the 20th. A. It B. That C. ThisD. Its( ) 8. I bought a knife and lent _ to him.A. it B. that C. oneD. ones( ) 9. _ is very difficult

16、to remember all their names.A. That B. It C. This D. ItsDAB( ) 10. I found _ very difficult to get to sleep last night.A. its B. it C. thats D. this( ) 11. _ was Bob _ I met in your room yesterday.It, whom B. That, who C. It, that D. This, who( ) 12. _ was in your room _ I met Bob yesterday.A. It, who B. It, that C. That, who D. That, that BCB二完成下列句子：1从深圳到广州大约两个小时的车程。 _ _ _ _ from Shenzhen to Guangzhou.2这里的气候是冬暖夏凉。 _ _ in winter while hot _ _.3请