2014年春人教版八年级英语下 Unit10 I have had this bike for three years A3课件

1、Unit 10 Ive had this bike for three years.,Section A 3 Grammer Focus-4c,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。,结构： 主语+ have / has + 动词的过去分词,否定句：havent/hasnt 一般疑问句： Have / Has ? Yes, 主语+have/has. No, 主语+havent/hasnt.,Revision,常与下列时间状语连用：just , already, yet, ever, never, before, se

2、veral times,表示从过去已经开始持续到现在的动作或状态，可以和表示“从过去某一时刻延续到现在的一段时间状语”连用，如“for+时间段”、“since+过去的时间点”、“since+从句(一般过去时态)”、“since+一段时间+ago”。且for与since引导的时间状语可以相互转换。,Present Perfect Tense,现在完成时,e.g. My uncle has worked at this factory for ten years. = My uncle has worked at this factory since ten year ago. Ive lived

3、 here since 1990 自从1990年以来我就住在这里。 I havent seen him for three years. 我三年没有看见他了。,选用for和since填空: 1.We havent seen each other _ a long time. 2.His father has been in the factory _ 10 years ago. 3.The film has been on _ 20 minutes. 4.Mr Green has worked here _ he came to China. 5.His grandparents have b

4、een dead _ several years. 6. Its five years _ we met last time,for,since,for,since,for,since,此种用法中表示持续性的动作或状态的 动词必须是延续性动词(否定句除外)。 1. 这本书我买了5年了。 I have bought the book for five years. ( ) I have had the book for five years. ( ),句中动词的特点,2. 你哥哥参军多长时间了？ How long has your brother joined the army? ( ) How

5、 long has your brother been in the army/been a soldier? ( ),1. 转换为相应的延续性动词，用于现在完成时。 borrow keep buy have put on wear catch a cold have a cold get to know know get to sleep sleep,非延续性动词和延续性动词之间的转换,2. 转化为“be + 形容词/副词/介词/名词” begin / start be on go out be out close be closed open be open get to/arrive/r

6、each be (in) die be dead leave be away,finish be over fall sleep be asleep join be in/be a member of become be make friends be friends come/go/ be + 相应的介词短语,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

7、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：,在学习这一概念的同时，应注意常与现在完成时连用的几个副词：already, just, ever, yet, never等。already, just多用于肯定句中，ever, yet, never多用于疑问句和否定句中。 如：I have already finished my homework 我已经做完家庭作业了。 He has just had his meal他刚吃过饭。 Have you ever sung this English song？ 你曾唱过这首英文歌吗？ They havent

8、started yet. 他们还没有身。 We have never heard of it 我们从来没有听说过这件事。,动词填空： 1._ you _(clean) the room? Yes, we _(do) that already. When _ you _(do) it? We _(do) it an hour ago. 2._ he _(see) this film yet? Yes. When _ he _(see) it? He _ it last week. 3. How many times _you _( come) here? Once.,Have,cleaned,h

9、ave done,did,do,did,Has,seen,did,see,saw,have,come,4. I _ (read) the novel twice. Its interesting. 5. She _ (go) to Pairs, hasnt she? Yes. How _ she _(go) there? She _(go) there by air. 6. So far, many countries _(develop) their software programs. 7.Mr Chen _(give) up smoking last year. 8._ you ever

10、 _(ride) a horse? Never. 9.He _( keep) the book since two days ago.,have read,has gone,did,go,went,have developed,gave,Have,ridden,has kept,(1). have (has) been in 意为“已经在某地呆了多长时间”，常与表示一段时间的状语连用。 Mr. Brown has been in Shanghai for three days. 布朗先生来上海已经有三天了。 They have been in Canada for five years. 他们

11、到加拿大有五年了。,have been in, have been to 与have gone to 的用法,(2). have (has) been to 意为“曾经去过某地”,表示现在已经不在那里了.可与 just, ever, never 等连用。 如：Ive just been to the post office. 我刚才去邮局了。 Have you ever been to Hangzhou? 你曾经去过杭州吗？ Mary has never been to the Great Wall. 玛丽从未去过长城。 have(has)been to后面可接次数,表示去过某地几次。 如：I

12、ve been to Beijing three times. 我去过北京三次。,(3). have (has) gone to 意为“到某地去了”，表示到了某地或正在去某地的途中。总之，说话时该人不在现场，一般不用第一、二人称代词作主语。 如: Where is Tom? 汤姆在哪里？ He has gone to the bookshop. 他到书店去了。,Grammar Focus,4a,Rewrite the sentences using for or since.,Jim is in Japan. He arrived there three days ago. 2. They a

13、re very hungry. Their last meal was ten hours ago.,They have been hungry for ten hours/since ten hours ago.,Jim has been in Japan for three years.,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

14、since 2009.,I have known Ann for three years/ since three years ago.,Linda has been ill since Monday.,1. I _ (never be) to the water park before. I 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

15、 since last November. We _ (buy) it from the Li family when they moved to the US last year.,Fill in the blanks with the correct forms of the verbs in brackets.,have never been,go,have never owned,always want,have had,bought,4b,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