(共27张PPT)
Unit 4 A museum piece
New words!
attic
computer
personal computer
hard disk
Megabyte
lawnmower
jet
since
阁楼;顶楼
电脑
个人电脑
(计算机) 硬盘
兆字节,百万字节
割草机
喷气式飞机
自从…..以来
Listening and Understanding.
Listen to the recording,and then answer this question:
How long has the computer been in the attic
Let’s watch.
Robert: What’s this, Dad
William: It’s Apple 2. It’s a very early computer.
In fact (事实上), it’s the first Personal Computer,
ever(曾今).
It came onto the market（面世）
in 1977. Where did you find it
the first 第一
the second 第二
the third 第三
Where 特殊疑问词，在哪
PC: personal computer 个人电脑
第一台个人电脑是apple公司制造的 Apple（苹果电脑）是美国著名老牌计算机公司，成立于1977年，是个人电脑最早的倡导者和著名生产商。它所生产的苹果系列电脑，包括iMac，PowerMac，ibook，Powerbook等产品线的众多硬件产品，一直是个人电脑市场的主流产品之一，并曾提出过很多新概念，其产品也掀起过多次流行潮，风行一时。。目前，苹果电脑电脑公司在全球几十个国家建立了分公司或代表机构，其产品也行销全世界.
Robert: Mum found it in a box in the attic(阁楼).
William: Oh, then it’s mine! It’s been there for years.
In fact, it’s been there since we moved into this house!
find - found 发现
Mine = my thing
It’s been = it has been
现在完成时 have/has +动词过去分词
现在完成时：
Have/has + 动词过去分词
表示动词发生在过去，持续到现在或对现在产生影响，后接表示延续性的时间状语。
如： for+ 时间段
since+ 时间点
I have been to America since d 1998.
I have got the car for d five years.
“since+时间点”表示动作从过去的某一时刻
开始；与现在完成时连用，表示动作从过
去开始，经过了一段时间，一直持续到现在。
另since与ago也不同；since 放在“时间点”前面；ago 放在“时间点”后面。而且，ago 与过去时连用。
since 的用法
six month
three years
Sunday
ten o’ clock
last weekend
a long time
1996
January
for
for
since
since
Robert: Does it still（仍然） work
William: I don’t know…… Ah, there you are! Can you hear the hard disk（硬盘）
Can 是情态动词，表示能够，有能力做某事。
Can + 动词的原形，变一般疑问句时将Can提前至句首。
情态动词+动词原形
can, must, may 等都是情态动词，不能独立做谓语，需和实义动词连用。变一般疑问句时将情态动词直接提前至句首。
I can open the box. (变一般疑问句)
Can you open the box
Robert: Is that noise （噪音） the hard disk It sounds like a lawnmower (割草机)!
William: It is noisy （吵闹的，嘈杂的）! It hasn’t been out of its box for twenty years!
sound like 听起来像
noise
名词
噪音
noisy
形容词
有噪声的
for + 时间段
Robert: What can you do with it
William: Good question!
It’s just a museum piece （古董）, really.
It’s only got five Megabytes’ （兆） hard disk space (空间).
Robert: Five Megabytes!
That’s nothing! （太微不足道了）
It’s got= it has got (has got 有)
William: I know.
It was already a museum piece when I bought it,
and that was a long time ago.
Maybe （也许） I’m a museum piece now, too!
is – was
过去式
buy – bought
when I bought it
当我买它的时候
（过去时间，用过去时)
a long time ago
很久以前
（过去时间，用过去时）
延续性动词
动词分为延续性动词和非延续性动词(瞬间
动词).
延续动词:表示在一段时间内连续的动作或
事件.如:be , work , live hold 等。
非延续性动词：表示在极短的时间内完成
的动作。如：come ,go ,
leave, jump, arrive ,begin 等
非延续性动词-〉延续性动词
非延续性动词
延续性动词
arrive/ come/ go
be in/at +地点
die
be dead
begin/start
be on
leave
be away
finish
be over
put on
wear
buy
have
Practice!
I have been to Better School for 3 years.
Have you been to Better School for 3…
I haven’t been to Better School for 3 years.
They have lived here for 3 years.
Have they lived here for 3 years
They haven’t lived here for 3 years.
Difference!
They have lived here for 3 years.
他们已经在这里住三年了，（但是现在还在）。
They lived here for 3 years.
他们在这里在了三年。（现在已经不住这里了）。
Homework
1. 看4单元 视频，并跟读；
2. P28单词每个抄写一遍，朗读三遍并记忆，要求会默；背诵26-27的任选三段课文。Unit 4 随堂检测
一、单选。
( )1. It came onto the market _____ 1977.
A. in B. on C. at D. /
( )2. It _____ like a lawnmower.
A. tastes B. sounds C. smells D. has
( )3. Where _____ you find it
A. do B. is C. done D. did
( )4. What can you _____ _____ it
A. do with B. doing with C. did with D. done with
( )5. It hasn’t _____ out of its box for twenty years!
A. been B. gone C. go D. is
短语翻译（中英互译）。
听起来像 ______________________
很久以前 ________________________
In fact, it’s been there since we moved into this house! ________________________
It was already a museum piece when I bought it. ________________________
Has Jack already gone to the States ________________________
