(
课件网) 现在完成时 Business report We must accept finite disappointment, but we must never lose infinite hope. 1 目录 2 3 4 结 构 用 法 时间状语 短暂vs延续 结 构 Part one We must accept finite disappointment, but we must never lose infinite hope. Spring has already come, Will it still be far in summer? 现在完成时的结构 主语 + have/ has + 过去分词（pp） 助动词,无意义 Spring has already come， will it still be far in Summer ? 主语 + have/ has + 过去分词（pp） e.g. I have been to Beijing. 否定形态 haven’t ( have not ） +pp hasn’t ( has not ) +pp e.g. I haven’t been to Beijing. 疑问句———将助动词 have / has 提到句首 e.g. Have you ever been to Beijing? Yes, I have/No, I haven’t. 注：主语若是第三人称单数助动词用 has 现在完成时的结构 用 法 Part two We must accept finite disappointment, but we must never lose infinite hope. present(now) 现在 future 将来 past 过去 Present Perfect Tense 现在完成时 用法 I bought a pen. past now future I have a pen. I have bought a pen. 1.表示过去发生或完成的某一动作对现在造成影响或结果。 three minutes ago 到现在：强调结果 用法 1. We have just had lunch. 2. So far, no one has made any mistakes yet. 3. I have never traveled by plane so far. 到现在：强调结果 I learned English. past now future I still learn English. I have learned English for two years. 2.表示过去开始的动作持续到现在，甚至还可能继续下去。 I never stop. three years ago 到现在：强调继续 用法 1. I have just cleaned my room. (房间是干净的) 2.I have already lost the notebook. (我现在没有笔记本) 3. Someone has broken the vase. (花瓶现在是坏的) 4. I haven’t seen that movie yet . (不了解电影的内容) 到现在：强调继续 3.表示到目前为止已经完成的动作或状态。 eg. The talent show has been over. 4.表示到目前的一个时间段内重复发生的动作。 eg.We have taken three English exams so far this week. 用法 时间状语 Part three We must accept finite disappointment, but we must never lose infinite hope. 常用时间状语或提示词 before、recently（最近）、lately(最近)、in recent years,in the past few/数词 years/months、so far、up to now（到目前为止）、once、since+时间点/从句、for+时间段、already（肯定句）、yet（否定句和疑问句）、just（刚刚）、seldom、ever（曾经）、never ①already 已经 肯定句中或句尾 例: I have already found my pen. = I have found my pen already. ②yet已经 否定句和疑问句句尾 例：I have not finished the work yet. Have you bought a computer yet? ③ever曾经 句中 例：Have you ever seen pandas? 常用时间状语或提示词 ④never从不 句中 例：I have never been to Beijing. ⑤just刚刚 句中 例：I have just done my work. ⑥before以前 句尾 例：I have never been there before. 常用时间状语或提示词 ⑦so far到目前为止 例：So far he has learnt 200 words. ⑧how long多久 例：How long have you lived here? ⑨how many times多少次 例：How many times has he been to Beijing? 常用时间状语或提示词 ⑩ since Mr. Smith has worked here since 1984. （1984年以来，史密斯先生一直在这工作。） I have known Daniel since 7 years ago. （自从7年前我就认识丹尼尔 ... ...
