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(共19张PPT)
Unit 8 Making a Difference
Section A What can we do to help
4a-4d
Retell
Hi, I'm Teng Fei. I___________ (be) a volunteer atthe nursing home _______last year.
I've exercised with the elderly ___ help them stay active, and I've played Chinese chess with them too. I've even________ (teach) some of them how to use _____ mobile phone.
I' ve _______(meet) many lonely elderly people there. Since I started volunteering, I've listened to ______(they) interesting life ______(story)
and_______________(learn) to care ______them.
_____________ (volunteer) has made me happy, and I want to keep_______(do) it.
have been
since
to
taught
met
for
Volunteering
doing
a
their
stories
learned /learnt
present perfect tense
现在完成时
结构: have /has+ done (V过去分词)
past
present
（now）
future
表示过去发生或已经完成的某一动作对现在造成的影响或结果。
Present Perfect Tense
现在完成时
用法(一)：
I have already watched the movie.
I watched the movie last week.
我看了电影
(看了电影，现在知道电影内容)
I know this movie.
我了解这个电影
站在现在，回望过去
past
present
（now）
future
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。
用法(二)：
Present Perfect Tense
现在完成时
I became a volunteer in 2020.
我成为志愿者。
I'm still a volunteer now.
我依然是志愿者。
一直持续到现在
I have been a volunteer since 2020 / for six years.
(我从2020开始到现在一直都是志愿者)
since 2020
for six years
Discussion
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。
用法(二)：
Present Perfect Tense
现在完成时
现在完成时
时间标志词
谓语动词特点
Grammar
Read the sentences. How are for and since used differently
一先找出现在完成时的结构，二找出for和since 的区别
4a
for + 时间段
for + 时间段
since a few
since a long time ago
for + 时间段
时间标志词
since +时间点
since +具体时间
since +从句 (一般过去时)
since +时间段+ago
months ago
Practise
1. Mr. Brown has had his TV ________ 15 years.
2. I’ve taken driving lessons _________ last month.
3. Tom has worked in the factory _______ he left school ten years ago.
4. My friends haven’t visited me _______ my birthday.
5. She hasn’t had a good cup of coffee _______2 years.
6. Tom has worn glasses _________ two years ago.
for
since
for
since
since
since
用since或for填空。
时间标志词
for + 时间段
since +时间点
谓语动词特点
Present Perfect Tense
现在完成时
Look at these sentences. Do you think they are right or wrong
1 I have bought this book for 3 years.
2 He has joined the group since two weeks ago.
3 He has died for three years.
非延续性动词表示的动作极其短暂，不能持续。因此，在现在完成时肯定句中不可与表示一段时间的状语连用，应改用延续性动词。
had
been in
been dead
谓语动词特点
Present Perfect Tense
现在完成时
Look at these two sentences. Do you think they are right or wrong
1 I haven't heard from him for a year.
2 I haven't heard from him since March.
在现在完成时否定句中，因为非延续性动词的“非延续性” 被否定，成为可以延续的状态，因而可与表示一段时间的状语连用，说明某个动作一直没发生。
Discussion
谓语动词特点
Presentatinon
has taught
for
since
have been
for
Since
since
has helped
has trained
大学生
享受做...
军队
军人
...的一员
红十字会
加入组织
在小学
start = begin 开始
start to do sth.
=start doing sth.
开设课程；提供课程
Presentatinon
have worked
have helped
have made
have
met
met
was
got
smiled
thanked
在一家体育机构
帮忙做..
体育赛事
运动员
阿根廷
在体育场内
一场慈善比赛
adv. 热情地
be proud to do
对做...感到骄傲
Work in groups. Interview your groupmates using the questions below.
4d
How long have you
known your best friend / that girl / …
had your favourite toy / bag / …
lived in this town / your
neighbourhood / …
1
—How long have you known your best friend
—I have known my best friend for five years.
2
—How long have you had your favourite toy
—I have had my favourite toy for six months.
3
—How long have you lived in your neighbourhood
—I have lived in this neighbourhood since 2023.
现在完成时
Review
Practise
1._______ two years 2._______ two years ago
3._______ last month 4._______1999
5._______ yesterday 6._______4 o’clock
7._______ about 4 months 8. _______ she was a baby
9.________we were children 10. _______ six hours
for
since
since
for
since
since
since
since
since
for
时间标志词
for + 时间段
since +时间点
1. Tom is in the youth group now. He joined the group two weeks ago.
2. I have a camera. I bought it in 2023.
3. Grace lives in this village. She started to live here when she was born.
4. My sister works as an animal helper now. She got this job last year.
Tom has been in the youth group since two weeks ago.
I have had a camera since 2023.
Grace has lived in this village since she was born.
My sister has worked as an animal helper for one year.
谓语动词特点
Present Perfect Tense
现在完成时
Googbye
Thanks!
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