Unit 3 The world at one click Grammar 课件 2025-2026学年译林版八年级英语下册

该初中英语课件聚焦一般过去时与现在完成时的语法知识点，通过歌曲《Yesterday Once More》等导入活动引导学生识别两种时态，再经复习、实例呈现、规则总结、标志词分类及易错点提醒，搭建从感知到应用的学习支架。 其亮点在于以情境化活动提升语言能力，如歌曲导入和对话补全增强语言理解与表达，通过对比时态用法和标志词培养思维品质，多样化练习（单选、短文填空等）发展学习能力。总结部分系统对比两种时态，助力学生掌握，对学生提升语法应用能力，对教师提供完整教学资源，提高教学效率。

Grammar 1、To understand the differences between the simple past tense and the present perfect tense. 2、To grasp the expressions with the present perfect tense. 3、To grasp the expressions with the simple past tense. 4、To understand different uses of the present perfect tense. Learning objectives Lead-in Yesterday Once More When I ________young I'd listen to the radio Waiting for my favorite songs When they _______ I'd sing along It _______ me smile. Those ______such happy times And not so long ago How I _________where they had gone But they _______back again just like a long lost friend All the songs I love so well Every shalalala every wo'wo Still shines was played made were wondered came Find the Simple past tense and fill in the blanks Lead in Seasons in the song Goodbye to you my trusted friend We_________ each other since we were nine or ten Together we ___________hills and trees Learned of love and abc skinned our hearts and skinned our knees 've known 've climbed Find the Present perfect tense and fill in the blanks Revision 一般过去时 构成 用法 常用时间状语 动词的过去式 1. 表示过去某个时间发生的动作或存在的状态。 2. 表示过去经常或反复发生的动作。 yesterday last night / week / year... in 1990 two days ago … just now Revision 现在完成时 构成 用法 常用时间状语 have / has + done 1. 表示过去发生或已经完成的动作对现在造成的影响或结果。 2. 表示从过去某一时间开始一直持续到现在的动作或状态。 3.表示某个动作从过去到现在发生的次数。 already, yet, just, recently, never, before, over the years, in the past few years, so far, till now Presentation What are the forms of these verbs? And which tense are they used in? Simple past tense Present perfect tense Work out the rules (1) past present Daniel went to Beijing two years ago. We use the simple past tense to tell what happened in the past. We use the present perfect tense to talk about an action that started in the past and continues to the present. Daniel has lived in Beijing for two years. past present 我们用一般过去时讲述过去发生的事情。 我们用现在完成时讲述一个动作发生在过去并且持续到现在的动作。 Work out the rules (2) We use the present perfect tense to talk about the result of an action. When the action happened is not very important. It may have just happened or happened some time ago. Daniel has bought a new computer. (He has a computer now.) past present We use the simple past tense to tell what happened in the past. past present Daniel bought a new computer last month. 我们用现在完成时谈论或强调一个动作的结果，而动作发生的时间可能并不重要。 Work out the rules (3) past present He visited Canada in 2010 and 2011. We use the present perfect tense to tell how many times an action has happened till now. He has been to Canada twice. past present We use the simple past tense to tell what happened in the past. 我们用现在完成时讲述一个动作到现在为止已经发生的次数。 simple past present perfect 时间标志词分类（一般过去时） 1.昨日/前日类：yesterday, the day before yesterday 2.上周/上月类：last week/month/year/term 3.多久前：...ago（two days ago, five years ago） 4.具体过去时间：in 2019, on Monday morning（过去的） 5.其他：the other day（前几天） 时间标志词分类（现在完成时） 1.不确定时间：ever, never, already, just, yet, before 2.至今类：so far, up to now, till now, by now 3.一段时间：for+时间段（for three years, for a month） 4.自从类：since+时间点/从句（since 2020, since he came） 5.次数类：once, twice, many times 易混标志词——for & since 均为现在完成时专属，表“动作持续多久” for + 时间段（表时长）：for two hours, for a week since + 时间点/一般过去时从句（表起点） 例：since 2021 / since I was ten / since he arrived 转换：for three years = since three years ago 易错点提醒 1.现在完成时不能与yesterday/last week等连用 2.一般过去时必须有明确的过去时间状语 3.看到ever/never/yet/so far，直接用现在完成时 4.看到ago/last+时间/in+过去年份，直接用一般过去时 5.注意：主语为三单时，现在完成时用has I ________ (visit) the Palace Museum with my grandparents the other day. I ________ (climb) Mount Huang last summer. visited climbed I am happy that I ___________ (learn) to swim. ______ you ever ______ (try) the famous Tianjin Baozi? Have tried have learnt Practice Practice I ________________ (finish/just) my homework. Millie _______ (finish) her homework 20 minutes ago. 2. I ______ (write) an email to my friend yesterday. Daniel __________________ (write/already) two emails. have just finished finished wrote has already written 用括号中所给词的适当形式填空。 4. I _________ (live) in Sunshine Town since I was born. Daniel ____ (live) in Nanjing in 2007. have lived lived 专项练习——单项选择 1.—__________ you ever __________ to the online zoo? —Yes, I __________ it last month. A. Did; go; visited B. Have; been; visited C.Have; gone; visited 2.My brother __________ the bike in 2022 and he __________ it for two years. A. bought; has had B. has bought; had C.bought; bought 3.—Have you __________ finished your project? —Yes, I __________ it an hour ago. A. yet; finish B. already; finished C.already;have finished B A B Practice 专项练习——单项选择 4.He __________ to Nanjing three times so far. He __________ there last year. A. has been; went B. has gone; has been C.went; has gone 5.I __________ the book yesterday. I __________ it for one day. A. read; have had B. have read; read C.read; read 6.—__________ did you go to Shanghai? —Last summer. I __________ there with my family. A. When; went B. How; have been C.When;have gone A A A Practice Practice Have tried have seen visited have played has visited has learnt 亲自 Practice introduced has visited have collected signed visited have put have visited has not visited/hasn’t visited wrote have sent Practice decided has booked made has been told Summary 现在完成时 一般过去时 现在完成时 定义：一般过去时表示过去某个时间发生的事情或存在的状态，说话的侧重点在陈述过去发生的事情或存在的状态。 标志词：一般过去时通常与表示过去的时间状语连用,yesterday，last week， two years ago，just now, in2022等。 定义：现在完成时表示到说话时为止已经发生或完成(不一定结束)的动作或状态,强调造成的结果或对现在产生的影响。 标志词：现在完成时则通常和频度副词或表示一段时间的状语连用,如 many times, never, these days, this week, since ... for ..., till now, recently等. Homework Review the usage of the simple past tense and the present perfect tense. 2. Finish writing Millie’s trip to the USA. Lavf60.16.100 $Goodbye to you, my trusted friend. We know你家的生存，we will. I. We gland to and trees. From a friend all the day. Sing in in the sky. love. Goodbye, bar, bar. Please pray for me. I was about that. You try to teach me, right?