约1590字。

　　Unit 12 Western China学案
　　一. 本周教学内容：
　　Unit 12 Part 1
　　复习动词的现在完成时和一般过去时，复习使用there be 和have/has的使用。
　　二. 本周教学重点：
　　  1. 复习现在完成时,一般过去时
　　  2. 复习there be 和have/has的使用
　　  3. 课文中的重点词组。
　　三. 具体内容：
　　（一）1. 现在完成时：
　　现在完成时可以描述刚刚完成的动作,这时可以用just..
　　She has just returned from inner Mongolia.
　　They have just finished their voluntary service.
　　也可以描述从过去开始并持续到现在的动作或者描述经历.
　　I have had a great time.
　　They have read a lot.
　　2. 两种时态的区分
　　（1）一般过去时的谓语动词用过去式，
　　而现在完成时的谓语基本构成是“助动词have /has +过去分词”。
　　（2）一般过去时通常与表示过去的时间状语连用。如：yesterday, last week, two years ago, just now, in 2002等；而现在完成时则常与just, already, ever, never等副词和these days, this week, since..., for...等表示一段时间的状语连用。
　　①Have you seen the film?（A）Did you see the film?（B）[说明] 你看过这部电影吗？
　　（A）句强调的是被问者对剧情是否了解；（B）句强调的是看这部电影的动作是否发生过，并不强调是否知道其内容。
　　②How has he done it?(A) How did he do it?(B)[说明]他是怎么做的这件事？（A）句强调的是他做这件事的方式对现在产生了某种影响；(B)句单纯地询问做这件事的方式。
　　③He has lived in Beijing for 8 years.（A） He lived in Beijing for 8 years.（B）[说明]他在北京住了8年。（A）句讲的是到目前为止他在北京住了8年，可能还会继续在北京住下去。      
　　（B）句讲的是他在北京住过8年，现在不在北京了。
　　Ex. Read the passage and completed it with the correct form of the verbs.
　　Li Nan was born in Hangzhou, Zhejiang Province. Two years ago, he       (graduate) from medical school at Zhejiang University. Then he        (volunteer) to work with the Go West program. He      (go) to Inner Mongolia Autonomous Region and       (work) as a doctor. At first, he worked very hard. But he      (feel) lonely because he      (be) a long way from home. Sometimes he       (feel) like giving up. But after a short time, he      (be) able to make many new friends. People there were kind and warm-hearted. He      (begin) to like the place. Li Nan      just      (complete) his two years of voluntary service and        (return) home. He said, “I       (learn) a lot. It      (be) a useful experience for me.”
　　（二）there be 和have/has的使用。
　　1. there be 表示某地有某物，某处存在某物，不表示所属关系。there be 后的名词是主语，主语后的介词短语为地点状语。
　　There is a ball in my hand.
　　There are some apples in the basket.
　　Is there any water in the glass?