初中英语人教版（2024）八年级下册（2024）Unit 8 Making a DifferenceSection A教课课件ppt

这是一份初中英语人教版（2024）八年级下册（2024）Unit 8 Making a DifferenceSection A教课课件ppt，共21页。PPT课件主要包含了for，since，has taught，have been等内容，欢迎下载使用。
Presentatin
Watch tw vides and fill in the blanks.
I ______ ____ yu _____ a thusand years.
have lved
We______ _____ each ther_____ we were nine r ten.
have knwn
present perfect tense现在完成时
Hw lng have yu been a vlunteer?
Read the sentences. Hw are fr and since used differently?一先找出现在完成时的结构，二找出fr和since 的区别
现在完成时的构成：have/ has +过去分词（dne）
Read the sentences again，translate these sentences
你以前来过我们的动物收容所吗？
不，我没去过。但是我的一个朋友已经在这里做义工很久了。
是的，她做过。自从去年8月以来，她就一直在一家养老院做义工。
我已经成为一个志愿者几个月了。
他在博物馆做志愿者有多久了？
自从他的暑假开始，他就已经在这做志愿者工作了。
1. 表示过去发生或已完成的动作对现在造成的影响或结果；
现在完成时 | 1. 定义
Judy has been the first bunny cp in Ztpia.朱迪成为了动物城第一只兔子警察（动物城有了兔子警察）。
Judy has investigated this case fr 24 hurs.目前为止，朱迪已经调查案件超过24小时了（从24小时前一直调查到现在）I have wrked here fr 7 years. 我已经在这里工作7年了。(还会持续下去）
2. 表示过去已经开始并一直持续到现在，并有可能还会持续下去的动作或状态。
含fr或since的现在完成时 | 未完成用法的句式
fr和since现在完成时之间的转换
My sister has had her cell phne ____a mnth.=My sister has had her cell phne _________________.
since a mnth ag
7:30 five years three minutes 2026 May 5 tw mnths
时间点指的是具体的时间，比如1点、4月7日、2026年12月；时间段指的是一段时间内，比如说三点到四点，中间这一个小时就是一段时间。
1._______ tw years 2._______ tw years ag3._______ last mnth yesterday 6._______4 ’clck7._______ abut 4 mnths 8. _______ she was a baby9.________we were children 10. _______ six hurs
fr和since的练习
现在完成时态中带有fr或since的句子，动词需为延续性动词。
现在完成时态中带有fr或since的句子，动词需为延续性动词。用法如下
延续性动词可以在现在完成时中与表示一段时间的状 语连用，如：“fr+一段时间”“since+过去的时间点”“since +一段时间+ag”“since 引导的时间状语从句（一般过去时）”
◆ My sister has kept these pstcards since she was five. 我妹妹从五岁起就留着这些明信片了。
Lk at these sentences. D yu think they are right r wrng?
1 I have bught this bk fr 3 years.
2 I have bught this bk since 3 years ag.
3 He has died fr three years.
Lk at these tw sentences. D yu think they are right r wrng?
1 I haven't heard frm him fr a year.2 I haven't heard frm him since March.
非延续性动词转换为延续性动词的方法：将非延续性动词转化为“be+形容词或副词”，这样才能和时间段连用：
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.
have helped
Wrk in grups. Interview yur grupmates using the questins belw.
—Hw lng have yu knwn yur best friend?
—I have knwn my best friend fr five years.
—Hw lng have yu had yur favurite ty?
—I have had my favurite ty fr six mnths.
—Hw lng have yu lived in yur neighburhd?
—I have lived in this neighburhd since 2023.
1. Mr. Brwn has had his TV ________ 15 years.2. I’ve taken driving lessns _________ last mnth.3. Tm has wrked in the factry _______ he left schl ten years ag.4. My friends haven’t visited me _______ my birthday.5. She hasn’t had a gd cup f cffee _______2 years.6. Tm has wrn glasses _________ tw years ag.
用所给单词的正确形式填空，完成短文。
I 1. __________（be）a vlunteer at the Sunshine Cmmunity Center fr ver tw years nw. I first 2. _______（jin）the prgram in September 2022, s I 3. ____________（wrk）here since I was a freshman in cllege. My main duty is t help with the after-schl tutring prject. I 4._________（meet）s many wnderful children. One f them, a by named Le, 5. _________（be）in my class since the prject started. I 6. _____________（watch）him grw frm a shy kid int a cnfident student. It’s amazing t see the prgress. The wrk isn’t always easy, but it is incredibly fulfilling. I 7.___（learn)mre abut patience and cmmunicatin than I ever thught pssible. S far, ur team 8. _____________（rganize）three charity sales and 9. ____ _（raise）a significant amunt f mney fr new bks and supplies. I 10. _________________（nt regret）my decisin t vlunteer fr a single day. This experience has already shaped wh I am, and I plan t cntinue fr as lng as I can.
have watched
have learned
has rganized
have nt regretted