八年级下学期Unit 1课件现在完成时态.ppt

一、现在完成时谓语动词的构成：助动词have/has(not) +V-ed（过去分词） I ______________(finish) the composition already. 过去分词的构成 规则形式 -- ed 不规则形式 repair-repaired --- e +d (见表格121) like /live/ move/love 双写辅音+ed stop/mop/travel 现在完成时用法（一） 过去的(结束性)动作产生的影响或结果现在还存在。 I ________ (do) my homework already. He _____________(not finished) his homework yet. _______you ever ______ (be) to Haiwaii? We ______ never ______ (see) such an exciting match before. Mother _____ just _______(clean) the house. Please don’t come in. They _________________(practice) this dialogue twice. I _____________( not hear) from her yet. _____they _______(be) here recently? Yes, they have. I ___________(be) busy recently. ---_____your father ever ______ (travel) to New York? ---No,never. He __________________(not travel) by plane yet. How long have/has sb …….? lived learned owned For …. Since… 现在完成时用法二: 过去开始的动作或状态一直持续到现在 1. 常用延续性动词,如be, sleep, live, learn, stay, have, keep, work, walk, … 2. 时间状语须表达过去到现在的一段时间. for two years so far since 短语, during the past 2 years since 从句 in the past 2 years 表示一段时间的主要结构 2000 last week yesterday (evening) three weeks ago he joined the Party two years ago 标志词：for +一段时间, since+过去的时间点, these years, so far, in the past/last …years We __________ (learn) English for three years/ since two years ago/since 2000. Mr. Green _________ (be) in China these years. They ____________(write) 15 songs so far. The population ____________ (grow) more slowly in the past ten years. 1.The Jiangs ___________(live) here for almost ten years. 2.He _____________(work) in the factory since 1994. 3.His parent ___________(teach) in this school since they came to the city. 4.The child ____________(sleep)since two hours ago. Work in pairs: Doctor: Wha