英语人教版八年级下册Unit10 Section A 4a – 4c.ppt

1、Unit 10 Ive had this bike for three years.,Section A Grammar Focus,玲珑塔寄宿制初级中学 王世坤,现在完成时：表示过去发生或已经完成的某一动作对现在造成的影响或结果，或从过去开始一直延续到现在的动作或保存的状态，强调的是现在的情况，不能和表示过去的时间状语连用（如：in 1990，last Sunday 等）。,一般过去时：一般过去时只表示过去的动作或状态，和现在不发生关系（即动作或状态在现在已经结束），它可以和表示过去的时间状语连用。,现在完成时与一般过去时的区别：,have / has + V过去分词,Grammar Foc

2、us,for 和 since 在现在完成时中的应用,for与since都能与现在完成时连用，但区别较大： （1）for后须接“时间段” He has studied English for five years. 他学英语5年了。 （2）since后须接“时间点” He has studied English since 1999. 他从1999年开始学英语。,（3）二者可以转换 for + 一段时间 = since + 一段时间 + ago He has been here for five weeks. = He has been here since five weeks ago. 他到

3、这儿已经有五个星期了。,如： He has taught here since he came to China. 自从他来到中国就在这儿教书。 We have been friends since we met in school. 我们从在学校见面起就成为了好朋友。,(4) since能引导时间状语从句(主句用现在完成时，从句用一般过去时)，而for则不能。,（5）现在完成时常用句型： It is (has been) +时间段+ since +时间状语或从句 It is four days since last Friday. 从上周五到现在已经四天了。 It has been two

4、years since Jim came to Beijing. 吉姆来北京已经两年了。,Jim is in Japan. He arrived there three days ago. _ 2. They are very hungry. Their last meal was ten hours ago. _,4a Rewrite the sentences using for or since.,Jim has been in Japan for three days.,They are very hungry because they havent had their meal fo

5、r ten hours.,3. I have a camera. I bought it in 2009. _ 4. I know Anna. I first met her three years ago. _ 5. Linda is ill. She became ill on Monday. _,I have had a camera since 2009.,I have known Anna for three years .,Linda has been ill since Monday .,1. I _ (never be) to the water park before. I

6、want to _ (go) next month before the weather gets too cold. 2. They_(never own) any pets, but they _ (always want) to have a dog. 3. We_ (have) a piano since last November. We _ (buy) it from the Li family when they moved to the US last year.,4b Fill in the blanks with the correct forms of the verbs

7、 in brackets.,have never been,go,have never owned,always want,have had,bought,4. Cathy and Amy _ (not be) back to their hometown for two years. They _ (miss) their hometown a lot and hope to visit the place next year. 5. This museum _ (be) here for over 20 years. It _ (be) one of the oldest building

8、s in this small town.,havent been,miss,has been,is,4c Fill in the questions and ask two students. Then complete the chart.,1. Do you have a (n)_? How long have you had it? 2. Do you own a (n)_? How long have you owned it?,选择for或since填空： I have been here _five months ago. 2. He has been a soldier _ a

9、bout two months. 3. Great changes have taken place _ you left. 4. His grandpa has been dead _ ten years. 5. I have studied English _ I was 12 years old. 6. It is two years _ I became a postgraduate student.,since,for,since,for,since,since,即学即练,练习题: Its a long time since we _ (meet) last, isnt it? 2.

10、 -I know you _ (choose) a picture book among these. -Yes, Have a look at it, please. 3. So far, spaceships without people _ (reach) the moon and some other parts of the universe. 4. My father_ home for nearly three weeks.A. has gone away from B. has leftC. has been away from D. went away 5. Mr. and Mrs. Green have_ in China for a week.