人教版（2024）八年级下册（2024）Unit 8 Making a DifferenceSection A教案配套课件ppt

这是一份人教版（2024）八年级下册（2024）Unit 8 Making a DifferenceSection A教案配套课件ppt，共23页。PPT课件主要包含了现在完成时，一般过去时，since，for，has taught，have been，Since，has helped，have made，was等内容，欢迎下载使用。
What can yu see in these pictures?
Read the sentences. Hw are fr and since used differently?
现在完成时表示从过去某一时间开始并一直持续到现在的动作或状态，常与“fr+时间段”和“since +过去的时间点或从句”连用。
He has wrked here fr ver twenty years. 他已经在这里工作二十多年了。He has learnt abut 2,000 English wrds since he started learning English. 他自开始学英语以来已经学了大约2000个英语单词。
1.后接具体的过去时间点：last week, 2022, yesterday mrning, …例句：I have been a student here since last September.2.后接一般过去时的完整句子：主+谓(过去式)+其他例句：They have lived here since they gt married.3.位置：可置于句首或句中，句首时加逗号4.关键：since后不能接时间段，只能接“时间点”或“句子”
1.后接纯时间段：three days, five mnths, half a year, …例句：He has taught in this schl fr eight years.2.后接模糊时间段：a lng time, a while, several years, …例句：We have waited fr a lng time.3.位置：只能置于句中，不可置于句首4.关键：fr后不能接时间点，只能接持续的时间长度
1. 现在完成时表“持续”的核心概念含义：表示从过去开始，持续到现在的动作/状态重点：动作的持续性，常与since/fr搭配使用时间：过去的某个时间开始，一直延续到当下本单元运用：描述志愿者工作、持续的行为状态等场景关键：不强调动作结束，只关注“从过去到现在”的持续
2. 基本结构（肯/否句）(1) 肯定句：主语 + have/has + 动词过去分词have/has规则：I/we/yu/they→have；he/she/it→has例句：She has wrked as a vlunteer fr tw years.她做志愿者已经两年了。(2) 否定句：主语 + have/has + nt + 动词过去分词缩写：haven’t / hasn’t例句：They haven’t lived here since 2020.他们从2020年起就不在这里住了。
(3) 特殊疑问句:疑问词：Hw lng（多久，询问持续时间）句式： Hw lng + have/has + 主语 + 过去分词？回答： 直接用since/fr引导的短语作答例句： —Hw lng have yu been here? —Fr three mnths.易错点：不可用When提问持续时间，只能用Hw lng
3. 含fr和含since的现在完成时的句子有时可以互相转换。
我从 13 年前开始就住在这里。
I’ve lived here fr 13 years.
It has been 13 years since I began t live here.
I’ve lived here since 13 years ag.
注意：在含有现在完成时的肯定句中，与表示持续性时间的状语连用的动词一般为延续性动词，但在否定句中，可以用非延续性动词。
常见的延续性动词有have、live、teach、learn、wrk、study、knw等；常见的非延续性动词(词组)有cme、g、leave、start、die、finish、becme、jin、buy、get married等。
表示过去发生的某一动作对现在造成的影响或产生的结果，强调的是现在的情况；不能和表示过去的时间状语连用。
He has lived here since 2012.自2012年以来他一直住在这里。(他现在还住在这里)
只表示过去的动作或状态，和现在不发生联系；可以和表示过去的时间状语连用。
He lived here in 2012.2012年他住在这里。(不涉及他现在是否还住在这里)
1.I have learned English _________ I was six years have lived in Shanghai _________ five has been a teacher _________ have knwn each ther _________ a lng has played basketball _________ he came t this schl.
Cmplete the sentences with the crrect frms f the verbs in brackets and fr r since.
1. This cllege student enjys vlunteering fr the army. She _____________(teach) English t the sldiers _____ three years.2. I ___________(be) a member f the Red Crss fr six years. I have made a lt f friends ______ I jined the rganizatin.3. Mr Wu has taught in a primary schl as a vlunteer _____ tw years nw. ______ he started wrking there, he __________(help) many students.4. The rganizatin ___________(train) ver 6,000 vlunteers ________ it began t ffer classes three years ag.
has trained
Cmplete the passage with the crrect frms f the verbs in brackets.
I lve being a vlunteer! I _____________ (wrk) with a sprts rganizatin fr almst three years nw. Since I started, I __________ (help) ut at ver ten different sprts events. I __________ (make) many new friends and I ________ even _______ (meet) many famus athletes. Fr example, I _________ (meet) tw natinal ftball players frm Argentina last mnth. They were at a stadium fr a charity match. The stadium _______ (be) s big that they ________(get) lst. I gave them directins and they __________ (smile) and __________ (thank) me warmly. I am prud t be a vlunteer.
have helped
have met
Wrk in grups. Interview yur grupmates using the questins belw. Share the answers with the class.
1. s＋adj./adv.＋that＋结果状语从句　如此······以至于······The stadium was s big that they gt lst.体育馆太大了，以至于他们迷路了。（原文再现）
1. She is kind everyne likes her.2. He is tired he can’t walk.3. It rained hard we stayed at hme.4. It is an interesting stry I read it twice.5. The bx is very heavy. I can’t lift it.→The bx is heavy I can’t lift it.→It is a heavy bx I can’t lift it.
s that
such that
s that
such that
2. help ut帮助(某人)解决困难或完成工作Since I started, I have helped ut at ver ten different sprts events.自从我开始(做志愿者)以来，我已经在十多个不同的体育赛事中帮忙了。（原文再现）
1. 每当我遇到困难，他总是第一个来帮忙。Whenever I’m in truble，he is always the first t .2. 当我看到我的家乡的老照片时忍不住哭了起来。I when I saw the ld pht f my hmetwn.3. 我忍不住要对你的成功表示祝贺。I cngratulate yu n yur success.4. 你能帮我搬一下这个重箱子吗？Culd yu me this heavy bx?
help me ut
culdn’t help crying
can’t help but
help t carry
1.We have studied in this schl _________ has practiced the pian _________ tw years.3.I have knwn Tm _________ I was in primary have wrked as vlunteers _________ a few has lived in Nanjing _________ last baby has slept _________ nine ’ have waited fr yu _________ twenty has lved reading _________ she was five.
一、选择since或fr填空
1.She ______________ (be) a teacher fr ten years.2.I _______________ (knw) him since we were film _____________ (be) n since ______________ (have) this watch fr five _______________ (wrk) in this hspital since _______________ (nt see) each ther fr a lng time.
二、用所给动词的适当形式填空
haven’t seen