现在完成时(_修改)课件.ppt

上一页;现在完成时;现在完成时;present(now);I. 现在完成时的构成 I have studied English since 2008. 主语+have /has+v 过去分词(Vpp) ;He has lived in Shenzhen for 4 years. Has he lived in Shenzhen for 4 years? Yes,he has. / No, he hasn’t .;二: 现在完成时的用法: 用法1)：表影响或结果。现在完成时表示过去发生的动作,并对现在有影响。 Someone has broken the window. (窗户现在是坏的) I have already lost the key. (我现在没有钥匙) I haven’t read that book yet . (不了解书的内容) I have just cleaned my hands. (手是干净的) ;I have just had my breakfast.;Translate the following sentences. ;现在完成时;for+时间段 VS since+时间点;Fill in the blanks: (for since) 1. She has learnt English ______ three years. 2. She has learnt English ______ three years ago. ;注意: 对for或since引导的时间状语提问 必须用how long, 决不能用when. ;用法3.表经验或频率?表示从过去到现在之间经历过的事情，也可以表示从过去某一时间到现在这段时间中反复发生的动作或工作量的积累,常和often，never，ever，twice，before等连用。 I?have?been?to?the?Great?Wall?twice.　 我曾经去过长城两次。 这支笔我只用过三次。 I have used this pen only three times. ;More practice: 1.This year alone we ______________ ten thousand trees. (plant) 2.-How many pages of the book _______________? (read) -I __________ thirty-five pages. (read) 3.Great changes _______________in the past five years. (take place) ;用于现在完成时中的时间状语 1.表示包括现在在内的一段时间的时间状语 until now, up to now, so far, recently, today, this morning/week/year, etc 2. 表示频率的时间状语 always, often, never, ever, five times, etc 3.表示不确定的过去时间状语 before，already, yet ;;用于现在完成时的句型 ;Do you know our town at all?　 No, this is the first time I ___ here. A. was　B. have been C. came　 D. am coming ;短暂性动词与时间段的关系;非延续动词与延续性动词的转换 (熟记); ? 翻 译 练 习： 1.我买了这块手表五年了。 2.这位老人已经死了十年了。; 3.他已经回来三天了。 4.自从六点钟他就来这儿了。 5.我离开家乡已十年了。 ;have been 与have gone 的用法比较 ;He has gone to Paris. （???现在在巴黎）;1. I ____ never ____ to China.;用have/has been to, have/has gone to填空： 1.—Where is your brother? —He ____________ the shop. He’ll be back soon. 2. — ______ you ever _________ to America? —Yes, I ___________ New York twice. 3. —Here you are at last! Where _____ you _____? —I _____________ London. 4. —David ____