2014春八年级英语(下)Unit 8 Section B 1a-1d.pptVIP

现在完成时 1. 她成为一名护士已经三年了。 2. 我五年前就认识李雷了。 3. 那些相片我已经寄给他了。（post） 4. 我来到这个学校后，他就一直教我。 5. 我刚丢了我的历史书。 1a-1d Qingtang Middle School by Zhou Bao. 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 一般疑问句： have / has … ? Yes, I have. No, I haven’t. Yes, she has. No, she hasn’t. 1. 现在完成时动词构成 have /has + v 过去分词 助动词 否定 haven’t hasn’t 疑问 Have you…? Has he…? 常与下列时间状语连用：just , already, yet, ever, never, before, several times 1.过去发生的动作对现在造成的影响或结果。和already，never,ever,just,before,yet等状语连用。 2.过去已经开始，持续到现在的动作或状态， 常与for或since引起的一段时间状语连用。 动词构成：have/has+v.过去分词 have breakfast I have just had my breakfast. (现在我不饿) I’m not hungry now moved here in 2004 I still live here I have lived here for ten years. I have lived here since 2004 / ten years ago. now past 2. 现在完成时动词可以表示开始于过去持续 到现在(也许还会继续进行下去)的动作或状态。 1) I have studied English since last year. 我从去年开始学习英语。 2) She has lived in Beijing for five years. 她住在北京已经五年了。 注意: come, go , leave, arrive, buy, lose, receive, join, die, bury 和marry 等动词所表示的动作是 一时的, 不能延续的, 故不能与for …, since … 等开头的表示一段时间的状语连用。不过, 这些 词用于否定句则可以与表示持续的时间状语连用， 即动作的不发生是可以持续的。 不能说: *He has come to Beijing for two years. *He has bought that book for three weeks. *He has joined the Army for one and a half years. *His grandma has died for nine months. * I have received his letter for a month. 可以说: He has been in Beijing for two years. He has had that book for three weeks. He has been in the army for one and a half years. His grandma has been dead for nine months. I havent received his letter for almost a month. ( 1).for+表示一段时间的短语 ( 2).since+表示过去时间点的词语 ( 3).since+表示过去时间的时间状语从句 eg. I have been a teacher ______ a year. He has been at this school _______ 1992. We have learned 1,000 English words _______ we came to this school. for since since 现在完成时句中常见的时间状语 表示从过去一直持续到现在, 不能是具体的过去时间。 1a. Who is your favorite singer or musician? Tell y