中考现在完成时复习.pptx

;Unit 8 Have you read Treasure Island yet?;现在完成时态present perfect;Grammar Focus;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。;1. 现在完成时动词构成 have /has + v 过去分词;现在完成时;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.;或者说： It is two years since he came to Beijing. It is three weeks since he bought that book. It is one and a half years since he joined the Army. It is nine months since his grandma died.;3. 现在完成时把过去的动作和现在的结果联系起来， 一般过去时只限于表示过去的动作本身, 与现在 的结果无关。现在完成时与一般过去时在意义上 的区别举例如下： I have cleaned my room. (My room is clean now.) 我已经打扫过我的房间了。 I cleaned my room last week. (I did it in the past.) 我上周打扫了我的房间。 Father has gone to Amoy. (He went to Amoy and he is not here now.) 爸爸已经去厦门了。 They have bought a dictionary. (They bought a dictionary and they have it now.) 他们买了一本字典。;注意: 现在完成时不能和明确指出时间的状语 (如: yesterday, last, year, in 1976, two days ago, just now, when she came in 等)连用， 但可以和不明确指出时间的状语(如: already, yet, ever, never, sometimes, always, often, before, once, twice, recently, lately等)连用； 也可以和表示包括现在在内的时间状语(如： today, this morning, this week, this year等)连用。; ( 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;ever;already “已经” ; yet “仍然, 还”