Unit 5 现在完成时课件 2025-2026学年沪教版八年级英语上册

The Present Perfect Tense 现 在 完 成 时 Unit 5Going on an exchange trip master the meaning, form and use of the present perfect tense use the present perfect with already, yet, ever, never, since and for correctly. Objectives学习目标 I have seen the film. I do not want to see it again. 这部电影我已经看过了，不想再看了。 一、现在完成时的用法 1. 在以前某个时间已经发生的行为或曾经做过的事 情对目前有某种影响； 2. 到目前为止已经完成的事情。 My aunt has travelled all over the world. 我姑姑已经周游了世界。 A The present perfect tense 4 While-learning 1.肯定句： 1) I have learnt some useful Chinese phrases at a local school with my British classmates. 2) Our teacher has told us we will do some Chinese painting and tai chi next week. 注意：句式中的have或has是助动词，has用于第三人称单数，其他人称用have。 have/has + V-ed 二、现在完成时的结构 2.否定句： 1) I haven’t tried tai chi before, so I am excited! 2) By the way, Wei hasn’t been to the UK. haven’t (hasn’t)＋V-ed 规则动词的过去分词通常与其过去式相同。你可以在第142页和第143页找到一些不规则动词的过去分词。 3.一般疑问句： 回答： Yes, … have (has). No, … haven’t (hasn’t). 1) — Have I/you/we/they made a lot of new friends? 2) — Has he/she/it made a lot of new friends? Have/Has + 主语 + V-ed + …? — Yes, you/I/we/they have./No, you/I/we/they have not. — Yes, he/she/it has./No, he/she/it has not. 原形 过去式 过去分词 规则 accept exchange stop study accepted accepted 一般在词尾直接加“ed” exchanged exchanged stopped stopped studied studied 以不发音的“e”结尾只在词尾加 “d” 重读闭音节结尾， 辅元辅结构， 先双写该辅音字母， 再加“ed” “辅音字母 + y” 结尾，将 “y”变为 “i” ，再加“ed” 动词的过去分词的变化规则--规则变化 AAA型 set ；cut ; AAB型 beat ABA型 come run ABB型 deal dig ABC型 do see beat beaten came come dealt dealt did done set set cut cut ran run dug dug saw seen 有一部分动词过去分词的变化是不规则的，需要记忆。 1. A: ______ Lisa ever ______(take) dance classes? B: Yes, she has. She took 6-week lessons before she came to the city. 2. A: Where is your sister, Sam? B: She _______ _______(go)to the market. She will be home soon. 3. A: Mum, could we go out to play now? B: I’m afraid not. The rain _______ _______ (not stop) yet. We have to stay at home. 4. A:_______ you _______(be) to Hong Kong? B:Yes, I have been (be) there twice. Has taken has gone hasn't stopped Have been Practice 用括号内所给词的适当形式完成句子。 Read the passage below and pay attention to the words in bold. 三、现在完成时的标志词 • We use _______ with a point in time（时间点）. We use _______ with a period of time（时间段）. • We can use the adverbs already, ever and never _____ have / has and _______ the main verb. • We often use yet at the end of a _______ or a _______ sentence. before since question negative for after 12 5:30 five years three minutes 2015 May 5 two months a point in time a period of time What’s the difference between a point in time and a period of time? 1.already: 用于肯定句，表示动作已经完成（通常用于句中或句末）。 例句： I have already read this book. 2.yet: 用于疑问句或否定句，表示动作尚未完成（通常用于句末）。 例句： Have you finished your work yet? / I haven’t finished my work yet. 3.ever: 用于疑问句，询问是否曾经有过某种经历（通常用于句中）。 例句： Have you ever visited the Great Wall? 4.never: 用于否定句，表示从未有过某种经历（通常用于句中）。 例句： I have never seen a dragon dance. 三、现在完成时的标志词（观察例子，总结标志词的用法） She has stayed with her host family since 14 October. He has worked here since 2010. 5. since Sarah has been in Beijing for a week. We have lived in this city for ten years. 6. for 意为“自从”，后接一个特定的时间点。 表示一个动作或状态的持续时长,后接一段时间（比如一个小时、一天、一周等）。 一、choose the best answer. 1. He has not finished his homework ________. A. already B. yet C. ever D. never 2. —Have you _________ been to Shanghai before? —No, this is my first time. A. already B. yet C. ever D. never 3. He has learnt English ______ he was in Grade 3. A. since B. for C. yet D. ever 4. They have play basketball _______ an hour. A. since B. for C. already D. never Practice 16 二、Complete the passage with the correct form of the verbs in brackets and since or for. Doris and Chris are good friends. They (1)______________ (know) each other (2)______________ a long time. They first met each other in the Tennis Club. Doris is now in London on an exchange trip. She (3)______________ (be) away (4)______________ last Sunday. Chris went on holiday the week before. Therefore, Doris (5)______________ (not see) Chris (6)______________ two weeks. have known for has been since hasn’t seen for I'm excited to share my exchange trip to the UK! I (1) __________ (be) in the UK for two weeks already. So far, this trip (2) __________ (be) an amazing experience. The school I’m studying at is great. I (3) __________ (make) lots of friends here already. The classes are really interesting, and I (4) __________ (learn) a lot about British culture. My English (5) __________ (improve) a lot too, and I’m learning new words every day. There are lots of fun activities after school. We (6) __________ already __________(visit) several famous tourist spots, such as the Tower of London and Big Ben. I (7) __________ (have) so much fun during this trip, and I don’t want it to end. This experience (8) __________ really __________(change) my life! have been has been have made have learnt has improved have visited have had has changed Complete the paasage with the correct form Grammar in use ·Have you ever been to Guangzhou ...? ·Have you visited ...? ·How long have you stayed/been in ...? ·Have you ever eaten ...? … Answer the questions with already, yet, ever, never, since and for. Interviewee Interviewer Work in pairs. Talk about your travelling to guangzhou. Take turns asking and answering questions. P74 现在完成时表示过去发生的动作与现在有关，指过去的动作对现在造成的影响、结果等。 already, yet, ever, never, since, for... 现在完成时 肯定句：主语 + have/has + done + 其他 否定句：主语 + haven't/hasn't + done + 其他 一般疑问句：Have/Has + 主语 + done + …？ 肯定答语：Yes, 主格代词 + have/has. 否定答语：No, 主格代词 + haven't/hasn't. 构成 定义 时间标志词 Key structure 1. Have you ever ....? 2. I have already... . / I have never... . Conclusion 评价内容 评分（1–5） 1. 我能理解现在完成时的结构和意义。 1 2 3 4 5 2. 我能正确理解现在完成时和already, yet, ever, never, since, for等副词的连用。 1 2 3 4 5 3. 我能用现在完成时谈论经历。 1 2 3 4 5 Self-assessment Homework 书面作业（可选） 创新探究性作业（可选） 1.整理错题本，将仍存在疑惑的地方以及易错点记入错题本。 1.结对练习，用现在完成时态造3个句子，并进行互评。 2.完成《阳光学业评价》Grammar部分练习。 2.小组合作，用思维导图总结本节课语法点，比比哪一组做得最好。 I have seen that the world is a book, and those who do not travel read only one page. ——Saint Augustine 圣﹒奥古斯汀 THANK YOU Thank you! 汇报人：WPS 24 $