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助动词have/has(not) +V-ed（过去分词） I ____________(finish) the composition already. 这种用法常与already, yet, ever, never, just, before(句末)等连用. I ________ (do) my homework already. He _____________(not finished) his homework yet. ____you ever _____(be) to Beijing? We ______ never ______ (see) such an exciting match before. Mother _____ just _______(clean) the house. Please don’t come in. They ___________ (practice) this dialogue before . 标志词：for + 时间段, since+时间点, over the years, so far, in the past/last … We __________ (learn) English for three years / since two years ago. Mr. Green _________ (be) in China over the years. They ____________(write) 15 songs so far. The population __________ (grow) more slowly in the past ten years. have/has gone to…  have/has been in … have/has been to… 1.A: Where’s Jim, Li Lei? B: He ____________his school library. 2.The Greens ____________China for three years. We ___________the Great Wall twice. It’s very beautiful. 现在完成时：表示动作或状态从过去开始一直延续到现在甚至将来 非延续的换成其相对应的延续性动词： buy borrow open close leave die join begin come * * * * 1. 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。(汉语中常用“已经”、“过”、“了”等表达）通常与表示包括现在在内的时间副词 just，already, before, yet, never, ever 等状语连用。例如： ① I have never heard of that before. ② Have you ever ridden a horse? ③ Have you milked the cow yet? Yes, I have done that already ④. I’ve just lost my math book 助动词have (has) + 动词的过去分词 He ___________(learn) English for three years. We / You / They have +P.P…. He / She has +P.P…. have finished has learned 过去分词的构成 一、规则变化 1、一般情况，直接加 –ed 2、以e结尾，把–d加， 3、辅加y，y变i，-ed加 4、重读闭音，双写-ed加 写出下列动词的过去分词 1. look ________ 2. watch________ 3. change________ 4. move________ 5. study_________ 6. carry__________ 7. plan_________ 8. stop________ 9. bring_________ 10. bu