Unit 3 The world at one click Grammar课件 2025-2026学年译林版英语八年级下册

Grammar Unit 3 The world at one click                 Learning aims： In this lesson, you will review the uses of simple past tense;         learn the differences between the simple past tense and present perfect tense; review the uses of present perfect tense;    write about travel experiences using the simple past tense and present perfect tense. ➷➷ ➷ ➷ ➷ ➷ ➷ ➷ ➷ ➷ Read and understand move to 搬到 have/has gone to 已经去了，未回 have/has been to sp +次数 已经去了几次 it's really worth a visit . 很值得参观 feel like + 从句：感觉好像... Enjoy a song It's been a long day without you my friend And I'll tell you all about it when I see you again We've come a long way from where we began Oh I'll tell you all about it when I see you again When I see you again Uses（用法） Grammar Simple past tense Present perfect tense 一般过去时 现在完成时 What's the differences between the simple past tense and present perfect tense? Forms（构成） Time markers （时间标志） 比较 Read and find What are the forms of these verbs? And which tense are they used in? Simple past tense Present perfect tense Read and work out What do the sentences tell us? 描述过去的动作，且该动作的时间（已经结束）。 It tells us that the action happened in the past and the action is over. It tells us that the action started in the past and continues to the present. It lasts for a period of time. 谈论始于过去并持续到现在的动作。 Practice Translate into Chinese 1. 他于去年9月去了工厂。 2. 他自去年9月起便在这家工厂工作。 He went to the factory last September. He has worked at the factory since last September. （一） Forms （构成） 去年夏天，我爬黄山。 前几天，她买了一辆新自行车。 我已经爬过黄山了。 她已经买了一辆新自行车。 I _______ (climb) Mount Huang last summer. She ________ (buy) a new bike the other day. I ____________ (climb) Mount Huang already. She ___________ (buy) a new bike. climbed bought have climbed has bought 一般过去时 Simple past tense 现在完成时 Present perfect tense Forms（构成） Complete the sentences. Read and work out What do the sentences tell us? It tells us what happened in the past and the action is finished. It tells us the result of an action which happened in the past. 谈论发生在过去动作的结果。 描述过去发生的事情，状态已结束。 动词形式 一般过去时 Simple past tense 现在完成时 Present perfect tense I climbed Mount Huang last summer. 规则变化过去式 V原形+ed She bought a new bike the other day. 不规则变化过去式需特殊记 buy -- bought am/is/are --________ was/were I have climbed Mount Huang. 规则变化: have/has + V过去分词 = V原形+ ed She has bought a new bike already. 不规则变化: have/has + V过去分词 需特殊记 buy -- bought am/is/are --________ been 1. He studied at the school five years ago. 2. He has already finished his studies at this school. Practice Translate into English 他五年前曾在这所学校就读。 他已在这所学校完成了学业。 课堂练习 答案：C 解析：watered。时间状语“yesterday”明确指向一般过去时，描述过去特定时间发生的动作（浇水）。选项B（现在完成时）强调对现在的影响，与句意不符。 1. — Peter, did you play table tennis with friends after school yesterday? — No, I didn't. We ______ vegetables in our school garden. A. water B. have watered C. watered D. are watering Presentation Read the second difference and answer the questions. What does the second sentence tell us? It tells us the result of an action which happened in the past. decided has booked made has been told Further thinking: What’s the reason for not using the simple past tense? the result of an action Practice: Finish Part C on page 42 Practice Make two sentences according to the second difference. Sentence 1: He studied in the school five years ago. Sentence 2: He has already finished his studies at this school. Production: Talk about an online trip or a real trip Tips: Pay attention to choosing the right tense Your online/real trip number of people what to see what to do food culture music ... 课堂练习 答案：A 解析：have seen。“so far（迄今为止）”是现在完成时标志词，强调动作从过去持续至今并可能继续（已看三次）。选项B（一般过去时）仅表示过去动作，无延续性。 2. The film Ne Zha 2 is worth seeing. I ______ it three times so far. A. have seen B. saw C. will see D. see Presentation Read the third difference and answer the questions. What does the first sentence tell us? It tells us what happened in the past.  Presentation Read the third difference and answer the questions. What does the second sentence tell? It tells us how many times the action has happened up to the present. 课堂小测——单句改错 1.I have met her in the street yesterday. 2.He has gone to Beijing twice. 3.They lived here since 2020. 4.I buy a new phone three days ago. 5.She hasn't finish her homework yet. 删去have gone→been lived→have lived buy→bought finish→finished 课堂小测——单句改错 6.So far, we learned ten new words. 7.He visit his grandpa last weekend. 8.Have you ever went to the online museum? 9.We have lived here for three years ago. 10.My mother has cook dinner for us. learned前加have visit→visited went→been 删去ago cook→cooked 课堂练习 答案：B 解析：watched “last weekend”指明动作发生在过去特定时间（上周末），需用一般过去时。选项C（现在完成时）需搭配无具体时间或延续性状语（如already, since）。 3. After signing up for the online course, Amy ______ all the training videos last weekend. A. watches B. watched C. has watched D. will watch 核心知识点回顾（一） 1.一般过去时：过去完成，无现在关联，搭明确过去时间 2.现在完成时：过去动作，有现在关联，搭不确定/一段时间 3.现在完成时标志：ever/never/already/yet/so far/since/for 4.一般过去时标志：yesterday/last.../...ago/in+过去年份 5.三单主语：现在完成时用has，一般过去时不变 核心知识点回顾（二） 1.have been to（去过已回）vs have gone to（去了未回） 2.for+时间段，since+时间点/一般过去时从句 3.现在完成时不能与明确过去时间状语连用 4.一般过去时必须有明确的过去时间依据 5.瞬间动词表持续，需转换为延续性动词 Presentation Read the tips on page 40. We often use these time expressions with the present perfect tense: already, ever, just, recently, (not)yet, so far, up to now, until/till now... Practice Make two sentences according to the third difference. Sentence 1: He watched the film last week. Sentence 2: He has watched the film twice. 学习总结 1.两种时态的核心区别在于是否与现在有关联 2.时间标志词是判断时态的最直接依据 3.掌握固定搭配和易错点，避免语法错误 4.结合语境分析动作的时间和影响，灵活选时态 5.多练多总结，熟练运用两种时态完成各类题型 Thank you for listening! 30 See You Again Wiz Khalifa Nine Track Mind (Special Edition), track 13, disc 0 Blues 229604.8 $