人教版八年级下册Unit 10 I've had this bike for three years现在完成时讲解课件(共45张PPT)

(共45张PPT)
If winter has already come, can spring be far behind
成
时
现
在
完
现在完成时的构成
part 1
主语
+have/has
+过去分词
三单has，非三单have
We have just finished our homework.
He has already had lunch.
He has not had lunch yet.
2.否定句:主语+have/has + not + p.p.(过去分词)
We have not finished our homework yet.
I ______ just ______ (read) a book.
He_______ already ________ (phone) his parents.
They____________ (complete) many difficult tasks so far.
Mary____________ (live) here since last year.
You____________ (make) lots of friends up to now.
Children____________ (study) English since three months ago.
及时演练
have read
has phoned
have completed
has lived
have made
have studied
过去分词的变化规则
part 2
过去分词的构成--规则变化
talk→talked open→opened
直接加ed:
dance→danced change→changed
以e结尾的直接加d：
辅音字母加y结尾的变y为i再加ed：
重读辅元辅结尾双写辅音字母再加ed：
study→studied
cry→cried
stop→stopped
drop→dropped
过去分词的构成--不规则变化
put-put-put read-read-read
AAA型
meet-met-met buy-bought-bought
ABB型
ABA型
ABC型
AAB型
come-came-came become-became-become
go-went-gone do-did-done
beat-beat-beaten
现在完成时的用法
part 3
I have already had my lunch.
now
past
time
had lunch
I’m not hungry now
用法1
1. 到现在为止，
已经做了某事
(过去发生的动作对现在产生了影响或结果)
so far, by now, till now, up to now
already, yet, just
1. You’ve just eaten my food.
2. You’ve changed a lot up to now.
3. He has already returned the book to me.
你已经把我的食物吃光了。（言外之意，我没有食物可吃）
到目前为止你变了很多。（即：你和以前不一样）
他已经把书还给我了。（言外之意，书现在已经在我手里了）
对于现在完成时的运用，
一方面要从定义出发，根据语境来判断是否用现在完成时。
另一方面，有时间标志根据时间标志判断。
just vs. just now
just 与现在完成时连用，表示刚刚结束的动作对现在有影响。
have just done sth
易混淆点1
just now与一般过去时连用，表示动作结束了，与现在没有关系。
I'm not hungry because I have_____ had lunch.
I had lunch ________ and then went out.
--Did you see Miss Li _________
--Yes. She came here and gave me the paper
just
just now
just now
及时演练
用just、just now填空
及时演练
1. Mr. Cook_____________(cook) three dishes so far.
2. ________you ________(find) your watch yet
3. We _______already ________(return) the book.
4. He __________(buy)a CD yesterday, but he _______(read) it yet.
5. Cindy _______ (join) the book club last week and she _______ (read) four books already.
6. China________just_______(experience) historical changes and made great achievements.
7. Up to now, they________(buy) a lot of vegetables.
及时演练
has cooked
Have found
have returned
has bought
hasn't read
joined
has read
has experienced
have bought
用法2
2. 曾经做过某事，曾经做过某事几次，从来没有做过某事
I ___________________ for the school. 我上学从来没有迟到过。
I ___________________ to the Great Wall twice. 我曾经去过长城两次。
_____________________ the film 你曾看过这部电影吗？
I ___________________ the film before. 我曾看过这部电影。
ever，before
once， twice， three times
never
have never been late
have been
Have you ever seen
have ever seen
易混淆点2
have been to, have gone to 的区别
have been to:去过某地，已回
have gone to:去了某地，未回
She has gone to Shanghai.
She has been to Shanghai.
The girl has gone to school.
The boy has been to school.
用have been to、have gone to填空
My parents _______________ the Great Wall twice.
- ________you ever_________Xiamen
3.My sister _____________ the shop. She will be back in two hours.
4.She _____________ Shanghai. She isn’t here.
has gone to
have been to
Have
been to
has gone to
及时演练
3.从过去发生的动作，但该动作并未结束，且一直持续到现在，常与表示一段时间的时间状语连用，在肯定句中要与延续性动词连用。
I have lived here for four years.
I have lived here since four years ago.
now
past
time
moved here 2020
I still live here
用法3
in the past/last few years
recently, in recent years, lately,
for+一段时间
since
易错易混点3
for和since的运用
for+一段时间
since+时间点
since+... ago
since+句子（一般过去时）
1.He has stayed here for 3 hours.
3.He has stayed here since 3 o’clock.
2.He has stayed here since 3 hours ago.
4.He has taught English since he came here.
延续性动词和瞬间动词
part 4
延续性动词表示一种可持续的行为过程或状态。可以和表示一段时间的状语连用,如“for+一段时间”,“since+从句”等。
延续性动词
He has waited for two hours.
They have been watching TV for the whole evening.
work learn know keep
play drink lie live
sleep rain read wait
have wear stand walk
常见的延续性动词
非延续性动词又叫终止性动词、瞬间动词，表示动作或过程是短暂瞬间完成的。在肯定句中不可以和表示一段时间的状语连用。但在否定句中可以和表示一段时间的状语连用。
非延续性动词
I have bought my car for three days.
I bought my car last year.
I haven't come here for 3 weeks.
Tom bought the book three days ago.
Tom has bought the book.
Tom has bought the book for three days.
Tom has had the book for three days ago.
Tom hasn't bought any books since last year.
判断正误
She left the company three hours ago.
她3个小时前离开了公司。
She has been away from the company
for three hours.
她离开公司已经3个小时了。
He joined the Party 2 years ago.
他两年前入的党。
He has been in the Party for 2 years.
他入党两年了。
常见的非延续性动词和与之相应的延续性动词的对照
非延续性 延续性
(短语)动词 (短语)动词
leave be away
buy have
die be dead
become be
put on wear
join be in
常见的非延续性动词和与之相应的延续性动词的对照
非延续性 延续性
(短语)动词 (短语)动词
borrow keep
begin/start be on
finish be over
get to know know
get out be out
catch a cold have a cold
现在完成时重点句型
part 5
It/This/That is the first/second time that sb. have/has done sth.
It is the easiet competition that he has taken part in.
It is the first time that I have seen him.
It is the most interesting film that I have seen.
It is the third time that Mary has been late for school.
It/This/That is the + 形容词最高级+名词+ that sb. have/has done sth.
这是我读过的最有趣的书。
这是我第二次参观长城。
那是她见过的最糟糕的人。
这是他第三次和家人一起庆祝春节。
Practice more
have
copied
copied
have copyed
1.So far ,we ___________ 200 English words .
have copied
NEXT
Click on the right can
gone to
gone in
been to
2. ---Where’s your father ----He’s_________ Beijing
gone to
NEXT
Click on the right can
saw
see
have seen
3. A number of the students _______ the film yesterday .
saw
NEXT
Click on the right can
has, been
have been
has come
4. How long _____ he ______ in this factory
has been
NEXT
Click on the right can
has he
hasn't he
is he
5. He’s never been to China, ___________
has he
NEXT
Click on the right can
been dead
died
been died
6. How long has the girl’s mother ___________
been dead
NEXT
Click on the right can
yet
ever
already
7. ---Has he finished his homework ---No, he hasn’t finished it ______ .
yet
NEXT
Click on the right can
since
if
for
8. How many words have you learned _______ you began to learn English
since
NEXT
Click on the right can
The Smiths ______________(watch) TV this time yesterday .
She ____________(make) a lot of friends here so far.
Her parents _____________(not write) to her since they left.
It is five years since he _________(join) the Party.
were watching
has made
haven’t written
joined
用所给动词的适当形式填空
5. They _______(live) in this city ten years ago.
6. He ______just ______(come) back from the city .
7. ---Can Alice go hiking with us tomorrow
---If she _______(feel) better tonight .
8. Someone _______(call) you just now .
lived
has
come
feels
called
THANK YOU !