(
课件网) When you are going to water the plants, you find they have been watered . You don’t know who watered them and when they were watered. You ask: S: -Have you watered the plants T: -Yes, I_____. You don’t have to water them. S: -When did you water them T: -I _____them a moment ago. have watered 现在完成时 ※用法一 1层: just already yet 2层; before ever never once( twice、 three times……） have/has been to+某地 have/has gone to+某地 have/has been in /at+某地 现在完成时与一般过去时的区别 ※用法二 since for 用延续性动词 表示短暂性动词 现在完成时 ★构成：助动词have/has +V（过去分词）… 肯定句： 否定句： 一般疑问句： 主语+ have/has +V（过去分词）… 主语+ have/has+not +V（过去分词）… (have+not/has+not=haven’t/hasn’t) Have/Has+主语+V（过去分词）… Yes,主语+ have/has . No,主语+ haven’t/hasn’t 现在完成时 用法一：表示过去发生或完成的动作对现在造成的影响或结果。 ※ 1层 表“完成”，用一个字“了”代表，副词常用 just already yet ※ 2层 表“经验”，用一个字“过”代表，副词常用 before ever never once( twice、 three times……） I have already had breakfast. I haven’t had breakfast yet. Have you had breakfast yet He has just left. 1层: already“已经”常用于肯定句（句中或句末），yet常用于否定句 “还”和一般疑问句“已经”（都位于句末）。 just“刚、刚刚”（位于句中） 2层：before 以前 ever 曾经 never从没有 once一次( twice两次,three times三次……） 他以前从未开过车。 He has never driven a car before. 这首歌我们已经唱了两遍 We have sung the song twice. 你曾经喂过动物吗？ Have you ever fed the animals？ Practice(用already just yet never ever 填空） 1. I have _____ seen him before, so I have no idea about him. 2. Jack has _____ finished his homework. 3. I’ve _____ had some photos taken. 我刚照了几张相。 4. “Have you _____ seen the film ” “No, I have _____ seen it.” 5. “Has the bus left _____ ” “Yes, it has _____ left.” never already just ever never yet already/just have/has been to+某地(去过某地) have/has gone to+某地(去了某地) have/has been in /at+某地+for+ 一段时间(在某地待了多长时间) She has been abroad twice. --Where is she --She has gone to Europe. He has never been to Shanghai . He has gone home. The boy has been there for 3 days. --How long have you been in this town --I have been here since 7 years ago. 注意 现在完成时与一般过去时的区别 现在完成时与一般过去时两个动作都发生在过去，现在完成时指过去的动作对现在的影响，不强调时间；而一般过去时强调过去时间发生的动作。 【根本的区别就是：过去的时间状语不能用于现在完成时，包括疑问词when。】 改错： I have fed the dog just now. ( )( ) When have you seen this film ( ) ( ) have fed fed have you seen did you see 现在完成时 用法二:表示动作发生在过去，并且一直持续到现在，有可能继续。常与一段的时间连用。（由介词for和since表示，其他的副词有recently近来, in the past/last few years在过去的几年里，so far到目前为止) For+一段时间(for two years, for a long time) + 过去的时间（last year, two since years ago, 2015,yesterday……) +时间状语从句(一般过去时态） It ... ...
