Unit 5 Celebrations Grammar 现在完成时课件-2022-2023学年中职高一上学期英语高教版（2021）基础模块1

Present Perfect Tense 现在完成时 一、定义 二、基本结构 三、时间标志词 四、have been to; have gone to; have been in区别： 五、延续性动词与非延续性动词的用法： 目录 一、现在完成时定义： 1.表示过去发生的动作或状态，对现在造成的结果或影响。常与already, just, yet等连用。 eg：I have already finished my homework. 2.表示过去的动作或状态一直持续到现在，可能还要继续下去。常与for+一段时间，since+过去时间点/句子，so far等连用。 eg: He has been a teacher for 3 years. 二、现在完成时的基本结构： （1）主语+ have+过去分词（done） （2）主语+has+过去分词（done） （当主语是第一、第二人称单数或者第三人称复数时） （当主语是第三人称单数时） 1.肯定句： Eg： I have finished my homework. He has finished his homework. 2. 否定句： 主语+ 助动词have/has not +过去分词 Eg： I have not finished my homework. He has not finished his homework. =haven’t =hasn’t 3. 一般疑问句： Have/ Has +主语+ 过去分词 Eg： Have you finished your homework? 肯定回答： 否定回答： Yes, 主语+have/has. No, 主语+haven’t/hasn’t. 4.特殊疑问句： 特殊疑问词+ have/ has+主语+ done Eg：He has finished his homework. --Has he finished his homework? --Yes, he has. / No, he hasn’t. Eg: What has he finished? 三、时间标志词： 现在完成时常与时间副词already, yet, just, ever, for+时间段，since+时间点/句子，so far等连用。 already: “已经”，常用于肯定句中。 eg： I have already seen the film. 2. yet“已经”，常用于疑问句中。 eg： Has Tom read the book yet? “还，仍然”，常用于否定句和肯定句。 Eg： He has not begun to work yet. She is yet a child. 她还是个孩子。 3. ever：“曾经”，主要用于疑问句中。 eg：Have you ever wanted to travel around the world. 4. just: “刚刚”，常用于肯定句中。 eg： I have just finished lunch. 5. Since 和for的区别： Since+时间点 “自从……以来” Eg：1993， last term, yesterday。 For + 一段时间“长达多久” Eg：ten years, two days. Eg: Jim has been in Beijing _______ Monday. Jim has been in Beijing _______ three days. since for 练习： ---Why won’t you go to the movie with me, Lucy? --- Because I ________ it twice. A. see B. have seen C. saw D. will see 2. Since 2000, Xiaogan has become a new city. Everything ___________. A. is changed B. was changed C. had changed D. has changed 3. ---China develops so fast. --- That’s true. It ______ a lot already. A. changes B. changed C. will change D. has changed 四、have been to; have gone to; have been in区别： have b