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(共17张PPT)
Unit 7 A Good Read
八年级英语人教版·下册
Section A (Grammar)
课人：XXXX
一、新课引入
Let’s listen to some music!
We’ve known each other since we were 9 or 10.
Together we’ve climbed hills and trees.
What tenses are used in the two lines of lyrics
Present Perfect Tense.
二、新课讲解
现在完成时(一)
1. 意义
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。
—Do you want to play basketball with us —No, thanks. I have hurt my leg.
(过去动作：腿受伤； 现在影响：没办法去打球，只能留在座位上)
2. 构成
助动词 have/has+过去分词
二、新课讲解
现在完成时(一)
3. 句型
(1) 肯定句：主语+have/has+过去分词+其他.
Mom has already prepared supper. 妈妈已经准备好晚餐了。
(2) 否定句：主语+have/has+not+过去分词+其他.
Lucy hasn’t finished her homework yet. 露西还没有完成她的家庭作业。
二、新课讲解
现在完成时(一)
(3) 一般疑问句：Have/Has+主语+过去分词十其他.
肯定回答：Yes, 主语+have/has.
否定回答：No, 主语+haven’t/hasn’t.
—Have you got ready 你准备好了吗？
—Yes, I have. 是的，我准备好了。/ —No, I haven’t. 不，我没有。
二、新课讲解
现在完成时(一)
4. 用法及标志
(1) 表示过去某一时刻开始并一直持续到现在的动作或状态，适用于延续性动词，标志词有“for+一段时间”、“since+过去的某个时间点”。
It has been fine for weeks. 天晴了好几个星期。
They have known each other since ten years ago. 他们已经认识十年了。
二、新课讲解
现在完成时(一)
(2) 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，适用于短暂性动词，标志词有already(用于肯定句), yet(用于否定句和一般疑问句), ever, never, just 等。
I have already seen the film. 我已经看过这部电影了。
Lily hasn’t come back yet. 莉莉还没有回来。
二、新课讲解
现在完成时(一)
5. 与一般过去时的区别
(1) 一般过去时只强调过去的动作；现在完成时强调过去的动作对现在的影响。
She cleaned the room yesterday. 她昨天打扫了房间。(仅陈述 “昨天打扫” 这个过去的动作，不强调对现在的影响)
She has cleaned the room. 她已经打扫了房间。(强调过去的打扫动作对现在的影响：房间现在是干净的)
二、新课讲解
现在完成时(一)
(2) 一般过去时通常与表示过去的时间状语连用；现在完成时则不可以。
We visited the museum last Sunday. 我们上周日参观了博物馆。(有明确过去时间状语 last Sunday)
We have visited the museum. 我们已经参观过这个博物馆了。(不能加 last Sunday 这类过去时间状语)
二、新课讲解
现在完成时(一)
(3) 一般过去时只表示动作发生在过去；现在完成时表示过去的动作或状态延续到现在并可能持续下去。
He lived in Paris for two years. 他曾在巴黎住了两年。(动作发生在过去，现在已不住在巴黎)
He has lived in Paris for two years. 他已经在巴黎住了两年了。(从过去持续到现在，将来还可能住在巴黎)
三、归纳小结
现在完成时(一)
一、用 never, ever, already, just, yet 或for填空
1. I have __________ seen him before, so I have no idea about him.
2. Jack has __________ finished his homework.
3. Mr Wang has taught in this school __________ ten years.
4.—Have you __________ seen the film
—No, I have __________ seen it.
5.—Has the bus left __________
—Yes, it has __________ left.
四、强化训练
never
just
already
for
ever
never
yet
二、用括号内所给词的适当形式填空
1. This is his favorite science fiction, and he __________ (read) it twice.
2. —Does Mr White still live here
—No, he __________ (move) to Paris already.
3. Last month, Anna __________ the Great Wall. So far, she __________ many places of interest in China. (visit)
四、强化训练
has read
has moved
visited
has visited
4. —This is the second time that I have come to Taiyuan. It ____________ (change) a lot.
—Yes, it is becoming more and more beautiful.
5.—Do you know which city Jack is in
—Sorry, I don’t know. I ____________ (not hear) from him yet.
6. He ____________ (share) his toys with friends since he was five.
7. —How long _________ you _________ (study) here
—For about two years so far. I have made a lot of friends here.
四、强化训练
has changed
haven’t heard
has shared
have
studied
三、单项填空
( ) 1. —The task is finally done, let’s go eat something now.
—Great, I haven’t eaten anything ________ breakfast.
A. before B. since C. of D. from
( ) 2. I ________ back in the UK for three days, but it ________ like a century.
A. am; feel B. have been; feels
C. have been; feel D. am; felt
四、强化训练
B
B
( ) 3. The film Zootopia 2 ________ very popular since it was first shown on Nov. 26th.
A. became B. has become C. was becoming D. become
( ) 4. — ________ you ________ your homework yet
—Yes. We ________ it three hours ago.
A. Did; finish; did B. Have; finished; have
C. Have; finished; did D. Have; finish; had
四、强化训练
B
C
五、布置作业
Use the present perfect tense to talk about recent events and experiences.

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