现在完成时讲解完整版.pptVIP

The Present Perfect tense present(now)futurepast Present Perfect Tense 现在完成时2020/12/112 主语 + have/ has + 过去分词（pp）助动词,无意义 现在完成时的结构Winter has already come，will it still be far in spring 2020/12/113 主语 + have/ has + 过去分词（pp）否定形式 haven’t ( have not ） +过去分词 hasn’t ( has not ) +过去分词疑问句 把助动词 have / has 放在句首 现在完成时的结构注：主语若是第三人称单数助动词用 has2020/12/114 You have planted all the trees.I have planted all the trees.He/she has planted all the trees.They have planted all the trees. 区别have 和 has的用法 主语若是第三人称单数助动词用 has2020/12/115 1) 表示到现在为止已经完成或刚刚完成的动作。Now we have planted all the trees.He has just come back. They have built many buildings in this city. 现在完成时的用法2020/12/116 2) 表示过去发生的动作,强调结果或对现在的影响。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)常与already(已经), yet(已经), just(刚刚),ever(曾经)等词连用. already: 常用于肯定句中. yet: 常用于否定句,疑问句尾. 2020/12/117 3) 表示从过去开始并持续到现在的动作或状态，常与包括现在在内的一段时间的状语连用。She has learned English for 5 years. He has lived in Beijing since 5 years ago.2020/12/118 since: (自…以来)1)since+时间点He?has?stayed?here?since?5?o’clock.2)since+ 时间段+ agoHe?has?stayed?here?since?5?hours?ago.3)since+ 从句She?has?taught?English?since?he?came?here. for: (长达）for+ 时间段He has kept the book for 2 weeks.since , for 的用法: Take notes 2020/12/119 用for 或since填空Mr. Brown has had his TV ______ 15 years. I’ve taken driving lessons _______last month. My sister has had her cell phone ______a month . My friends haven’t visited me ______few days ago. We haven’t used our car _____ a long time . She hasn’t had a good cup of coffee _____years. Tom has worn glasses _______he was 7 years old. for since forsinceforforsince2020/12/1110 注：并非所有for作为时间状语的句子都用现在完成时 搞清一般过去时和现在完成时的区别I worked here for more than twenty years.(我现在已经不在这里工作了)I have worked here for more than twenty years.（现在我仍在这里工作）疑难点2020/12/1111 辨析 have been to和 have gone toMy father has gon