人教版八年级下册Unit 8 Have you read Treasure Island yet?现在完成时课件（共61张PPT）

(共61张PPT)
现在完成时态
The present perfect
tense
时态 （tense）
注意不同时间发生的
动作，动词要用不同形式。
复习已学习过的时态
1.v. 2.v+s/es（三单现）
am/is/are+v-ing
1.will/shall+v.
2.am/is/are going to +v.
1.v-ed（规则动词）
2.不规则动词
was/were+v-ing
名称 时间 动动词形式
一般现在时 平时，经常 1.v原形 2.v+s/es（三单现）
一般过去时 过去（与现在无关） am/is/are+v-ing
一般将来时

现在进行时 即将，计划

正在进行
1.will/shall+v原形
2.am/is/are going to +v原形
过去进行时 过去某一时间，在进行 1.v-ed（规则动词）
2.不规则动词
判断下列句子的时态
1.She works in a factory.
2.I was doing my homework at this time yesterday.

3.We are going to have a picnic this Sunday.

4.They held a sports meeting last week.

5.Are you helping your mother ？

一般现在时
过去进行时
一般将来时
一般过去时
现在进行时
现在完成时态


1.过去发生的动作对现在造成的影响或结果。和already，never,ever,just,before,yet等状语连用。
2.过去已经开始，持续到现在的动作或状态，
常与for或since引起的一段时间状语连用。
动词构成：have/has+v过去分词
have breakfast
I have just had my breakfast.
(现在我不饿)
I’m not hungry now
moved here
in 2014
I still live here
I have lived here for three years.
I have lived here since 2014/three years ago.
now
past
future

现在完成时动词构成
have /has+v 过去分词

助动词
否定
haven’t
hasn’t
疑问
Have you…?
Has he…?
翻译. ( English ===>Chinese)
finish,
homework
I have finished my homework.
He has finished his homework.
haven’t
Has he
Yes , he has.
No ,he hasn’t.
1.翻译1)我已经写完作业了；
2)他已经写完作业了.
2.第一句变成否定句；
3.第二句变成一般疑问句并回答。
？
2.过去某一时间点发生的动作持续 到现在或还将持续下去。
1.过去某一时间点发生的动作对现在产生影响。
I have learned English for ten years.
We have visited your school before.
He has lost his key to his bike.
He has lived in London since ten years ago.
A: ______ your brother _________ a new watch? (buy )

B: Not yet.
Key words
Has bought
yet
A: _______ you ever _______ to the park? ( be )

B: Yes, I went there last summer.
Key words
Have been
yet
ever
I ______ never ______ of anything like that.
(hear )
Key words
have heard
yet
ever
never
Tom He ___________ in the factory since he

left school ten years ago. (work )
Key words
has worked
yet
ever
never
since
A: How long ______ you ________ in this school? (teach )

B: For 6 years.
Key words
have taught
yet
ever
never
since
for
I ______ just ________ the desk, you

can take it to your classroom . (mend )
Key words
have mended
yet
ever
never
since
for
just
_______ you _______ the Forbidden City

(紫禁城) before ? (visit )
Key words
Have visited
yet
ever
never
since
for
just
before
He ____ already ______ a job. (find)
Key words
has found
yet
ever
never
since
for
just
before
already
We _______ only ____________ the first

five questions so far. (discuss )
Key words
have discussed
yet
ever
never
since
for
just
before
already
so far
They ______________over 24,000 fruit

trees up to now . (plant )
Key words
have planted
yet
ever
never
since
for
just
before
already
so far
up to now
Great changes _________________ in

Beijing in the past 10 years. (take place )
Key words
have taken place
yet
ever
never
since
for
just
before
already
so far
up to now
in the past 10 years
He __________ a lot of good things

in his life. (do )
Key words
has done
yet
ever
never
since
for
just
before
already
so far
up to now
in the past 10 years
in his life
I ____________ her lately. ( not see )
Key words
haven’t seen
yet
ever
never
since
for
just
before
already
so far
up to now
in the past 10 years
in his life
lately
I _________________ him recently.

(not hear from )
Key words
haven’t heard from
yet
ever
never
since
for
just
before
already
so far
up to now
in the past 10 years
in his life
lately
recently
He ___________ in this city

ever since then. (live )
Key words
has lived
yet
ever
never
since
for
just
before
already
so far
up to now
in the past 10 years
in his life
lately
recently
ever since then
He ___________ in this high

school till now. (teach )
Key words
has taught
yet
ever
never
since
for
just
before
already
so far
up to now
in the past 10 years
in his life
lately
recently
ever since then
till now
He has gone to Shanghai.
他(已经)去上海了。
He has been to Shanghai.
他(曾经) 去过上海。
易混点 have/has been to
have/has gone to
He went to Shanghai last week.
他(曾经)到/去过上海 [在他人生中曾经有过这样的经历,但他人现在肯定不是在上海而是回来了]
他已经去上海了 [也许刚动身出发,也许已经到了,也许还在路上,反正他人不在这里]
上周他[做了一件事:那就是]去了上海
He has been to Shanghai.
He has gone to Shanghai.
He has been in Shanghai for 10 years.
他呆在上海迄今为止已经10年了 [现在还在上海没有离开呢]
辨析这些句子
由时态导致的
含义上的差别
去过
常与ever, never,
once,twice,连用
在…
与时间段连用
用how long 提问
去了
说话时某人不在
只用于第三人称

Her sister _____________ Australia,

She left this morning.
has gone to
去过
常与ever, never,
once,twice,连用
在…
与时间段连用
用how long 提问
去了
说话时某人不在
只用于第三人称

A: Where is Bob ?
B: He ____________ Japan with
his sister.
has gone to
去过
常与ever, never,
once,twice,连用
在…
与时间段连用
用how long 提问
去了
说话时某人不在
只用于第三人称

A: I haven’t seen you for a long time.
Where _____ you _____?
B: I _____________ the United States.
have been to
have been
去过
常与ever, never,
once,twice,连用
在…
与时间段连用
用how long 提问
去了
说话时某人不在
只用于第三人称

A: How long ____ you _______ China?

B: I _________ here for 3 years.
have been
have been in
去过
常与ever, never,
once,twice,连用
在…
与时间段连用
用how long 提问
去了
说话时某人不在
只用于第三人称

A: _____ you ever ________ the city ?

B: No , never .
Have been to
去过
常与ever, never,
once,twice,连用
在…
与时间段连用
用how long 提问
去了
说话时某人不在
只用于第三人称

We ____________ Germany many

times in the past 3 years.
have been to
? since 用来说明动作起始时间— “自从……”

for用来说明动作延续时间长度— “长达……”
I have learned English for two years.
I have learned English since two years ago. I have learned English since 2015.
I have learned English since I was a middle school student .

比较since和for
注意：并非有for 作为时间状语的句子都用现在完成时
I worked here for more than twenty years. 　　　(我现在已不在这里工作。)
I have worked here for many years.　　　 　　　(现在我仍在这里工作。)


for+表示一段时间的词组，since+表示过去某一时刻的词或词组）谓语只可用延续性动词.
eg.--- I’ve lived here for 15 years.
eg.--- I’ve lived here since 15 years ago/(2002).
选用for和since填空:
1. ______ a long time 2. … ______ 10 years ago.
3.______ 4 hours 4….______ he came to
China.
5._____ 1999 6.______3 o’clock
7. ______ yesterday
8.______last month 9.______ we were children
for
for
since
since
since
since
since
since
since




It is + 时间段 since + 一般过去时的句子.

10. It’s five years _______ we met last time.
=It __________ five years _________ we met last
time.
=Five years _____________________ we met last
time.

since
has been since
has passed since
注意: 瞬间动词不能和时间段连用.
1. 我的哥哥是 1999 年参的军。
My brother joined the army in 1999.
He has been in the army for 5 years.
/ He has been a soldier since 5 years ago.
2. 他参军已经 5 年了。
She has bought the computer for two years.
had
How long have you come to the United States？
been in

Ann has gone to China since three months ago.
been in
I have got to Paris for one week .
been in
My brother has joined the army for five years.
been in
been a soldier
I have left Shanghai for 3 days.
been away for 3 days.
I have borrowed the dictionary since 3 days ago .
kept
The film has begun for 10 minutes.
been on
The concert has finished for half an hour.
been over
His dog has died for two years .
been dead
She has married for six years .
been married
know
have known
knew
saw
have
lost
have
did
move
lived
did
has finished
see
saw
注意：区分短暂性动词与持续性动词.
表示短暂性(瞬间性)的动词在现在完成时的句中不能和一段时间连用.短暂性的动词如：come，go，join，leave，buy等，在完成时态中不能与for,since短语或How long等引起的时间状语连用。
I have bought this pen for two months.
I have had this pen for two months.
How long have you _____ this pen.
had
The teacher has left.
The teacher has been away for half an hour .
(be away)
改错
How long have you become a league member？
For more than one year.
Have you arrived here since last night?
Yes，you’re right.
He has gone to Shanghai twice.
How long have been at this school?
Since two years.
been
been
been
For
动词填空：
1._____ you ________(clean) the room?
Yes, we__________(do) that already.
When _______ you ______(do) it?
We _______(do) it an hour ago.
2.______ he ______(see) this film yet? Yes.
When _____ he _____(see) it?
He ______ it last week.
3. How many times _____you______(come) here?
Once.
Have
cleaned
have done
did
do
did
Has
seen
did
see
saw
have
come
4. I _______ (read) the novel twice. It’s interesting.
5. She _______(go) to Pairs, hasn’t she? Yes.
How ______ she _______(go) there?
She _______(go) there by air.
6. So far, many countries ______________(develop)
their software programs.
7.Mr Chen ______(give)up smoking last year.
8.______ you ever _______(ride) a horse? Never.
9.He ________( keep) the book since two days ago.
have read
has gone
did
go
went
have developed
gave
Have
ridden
has kept
改写句子
Homework：
改写句子
1.My father came back from the bookshop just now.
My father ______ just ________ ______ the book shop.
2.He began to learn Chinese in 2001.
He _____ _______ Chinese since 2001.
3.The film began two minutes ago.
The film _____ ______ ______ since two minutes ago.
4.He has had the motorbike for two years.
It’s two years ______he ________ the motorbike.
He ________ the motorbike two years ______.
Two years ______ ______ since he ______ the motor bike
has
returned
from
has
learned
has been on
since
bought
bought
ago
has passed
bought
Fill in the blanks with the simple present, simple past or present perfect tense of the verbs
am
have lived
has changed
came
worked
don’t have
haven’t found
had
have met
haven’t known
have always wanted
got
haven’t bought
came
has not been
Thank you
Bye-bye!