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(共28张PPT)
Present perfect tense (1)
现在完成时(1)
能够理解现在完成时的意义和用法，总结现在完成时的语法规则。
能够用现在完成时进行句子写作。
能够用现在完成时改写句子。
adj. 完成时的
perfect
present perfect
现在完成式
past perfect
过去完成式
n. 一排，一行
row
There is a row of trees in front of the house.
房子前面有一排树。
n.身高；高，高度
height
Please state your height and weight.
请报一下你的身高和体重。
She is the same height as her sister.
她和她姐姐一样高。
Read the sentences from the reading passage and summarise the grammar rules.
(a) I haven’t told Maddie the whole story yet.
(b) I have already learnt that I am what I am.
Now find one more sentences with these structures in the reading passage.
I haven’t told Maddie yet how she has changed me.
现在完成时(1)
规则形式：动词过去分词的规则构成与其
过去式的构成相同。
现在完成时的构成：
助动词have / has +动词的过去分词
work → worked, pollute → polluted，plan → planned，carry → carried等。
动词的过去分词：
不规则形式：不规则动词的过去分词需牢
记。
be - was / were – been do - did – done
eat - ate – eaten go - went - gone
see - saw – seen find - found – found
have-had–had make - made - made
put - put – put let - let – let
become-became-become grow-grew-grown
hit-hit-hit hold-held-held
leave-left-left rise-rose-risen
send-sent-sent begin-began-begun
break-broke-broken bring-brought-brought
build – built – built buy - bought – bought
catch - caught – caught come - came - come
cost - cost – cost cut - cut – cut
drink-drank–drunk fall - fell - fallen
feel - felt – felt forget-forgot – forgotten
get -got- gotten give-gave-given
keep-kept-kept know-knew-known
lose-lost-lost read-read-read
run-ran-run say-said -said
现在完成时还可表示到目前为止已经完成的事情。
现在完成时的用法:
现在完成时可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。
e.g. The children have read the book.
(强调孩子们已经了解了这本书的大概内容。)
His elder brother has become a doctor.
(强调他的哥哥现在是一名医生。)
e.g. My aunt has travelled all over the world.
e.g. The children have not / haven’t read the book.
His elder brother has not / hasn’t become a doctor.
现在完成时的其它句式结构
否定句：主语+ have / has + not +动词的过去分词（+其它）.
(其中have not = haven’t; has not = hasn’t)
一般疑问句及其简略回答：
Have / Has +主语+动词的过去分词（+其它）
肯定回答：Yes, 主语(人称代词主格) + have / has.
否定回答：No, 主语(人称代词主格) + haven’t / hasn’t.
e.g. —Have the children read the book
—Yes, they have. / No, they haven’t.
—Has his elder brother become a doctor
—Yes, he has. / No, he hasn’t.
现在完成时常与 just, already 或 yet 等表示时间的状语连用。
e.g. I have just heard the news.
Astronauts have already been to the moon.
We have just started to explore other planets.
现在完成时的标志词
可以看出，just 用来表示 “刚刚”，already 用来表示 “已经”，两者都用于肯定句中，一般是置于 have /has 之后。在否定句中则可以用 yet，表示 “还未”，有 “以后可能会” 的含义。
e.g. The scientists have not heard from it yet.
Man has not discovered any life in space yet.
现在完成时在表达经历时表示该事件是在现在之前的某一个时间里发生的，重点在于已完成动作对现在的影响。而一般过去时则表示在过去某一具体时间发生的事情。
e.g. I have just been to London. I went there last month.
I have already finished my homework. I finished it an hour ago.
现在完成时与一般过去时
在没有明确的过去时间状语时，如何判断该用现在完成时还是一般过去时呢？判断的标准是看该行为是否对现在有影响，也就是说该句所强调的是什么。试看以下对话：
A: Where have you put my book I can’t find it.
B: I put it on your desk yesterday.
该对话中，当A问对方把自己的书放在何处时，A强调的是现在找不到了，因此用现在完成时。但是B回答时只是说明当时放的位置，所以用一般过去时。
A: Would you like to go and see the film with me tonight
B: Sorry, I have seen it already.
对话中的现在完成时表示对结果的强调：电影看过了，所以不想再看了。
再看下面的对话：
Write sentences with the present perfect tense.
1. I / just / cut my long hair
__________________________________________________
2. She / never / worry about / her looks
__________________________________________________
3. I / just/ paint a beautiful flower / on my face
__________________________________________________
4. Chris / always / wear / glasses
__________________________________________________
5. Jessica / already / change her opinion / on her looks
__________________________________________________
Jessica has already changed her opinion on her looks.
I have just cut my long hair.
She has never worried about her looks.
I have just painted a beautiful flower on my face.
Chris has always worn glasses.
I ________________ (always, be) the tallest student in my class. And I ________________ (always, sit) in the last row at school. People always look at me in surprise. “You must be good at basketball,” my classmates ________________(always, say). In fact, I'm not good at basketball at all. But being tall is not always bad. It makes me easy to recognise, and I can help other people get things down. Over time, I ________________(learn) to accept my height, I'm proud of myself.
Rewrite the passage using the present perfect tense.
have always been
have always sat
have always said
have learnt
Ⅰ. 写出下列动词的过去分词。
1. call _______ 2. move _______ 3. cry _______
4. stop _______ 5. speak _______ 6. teach _______
7. build _______ 8. decide _______ 9. show _______
10. put _______
called
moved
cried
stopped
spoken
taught
built
decided
shown
put
Ⅱ. 根据语境及括号内所给词语提示填空。
1. —Would you like some more food
—No, thanks. I ______________(have) enough.
2. —_____________ you _____________(see) my bag
I can’t find it anywhere.
—No, I haven’t.
3. —Mom, can I go to play basketball with my friends
—No, you can’t. You ______________(not wash) your dirty clothes.
have had
Have seen
haven’t washed
4. —Let’s visit the science museum this afternoon, Sam.
—I ______________(visit) it twice. I’d like to visit the city zoo.
5. You don’t need to clean the house. Emily ______________ (clean) it.
have visited
has cleaned
Ⅲ. 根据所给汉语意思完成英语句子，每空一词（含缩略形式）。
1. 我们已经找到了那个丢失的男孩。
We ________ ________ that lost boy.
2. 这些天，他没有见到Jack。
He ________ ________ Jack these days.
3. Robert已准备好了一切。
Robert ________ ___________ everything ready.
have found
hasn’t seen
has got / gotten
4. 你把数学书32页的练习题写完了吗？
________ you ________ writing the exercises on page 32 of your math book
5. 这种疾病已经传播开了，我们要小心。
The disease ________ ________. We need to be careful.
Have finished
has spread
Ⅳ. 根据括号内的要求完成下列各题，每空一词（含缩略形式）。
1. Jack and Henry have watched the concert. (改为否定句)
Jack and Henry ________ ________ the concert.
2. Mr. Brown has sold the old painting. (改为一般疑问句)
________ Mr. Brown ________ the old painting
3. —Has the film begun (补全肯定答语)
—Yes, ________ ________.
4. —Have your cousins come back from Qingdao (补全否定答语)
—No, ________ ________.
haven’t watched
Has sold
it has
they haven’t
I CAN
理解现在完成时的意义和用法，总结现在完成时的语法规则。
用现在完成时进行句子写作。
用现在完成时改写句子。
复习现在完成时。
用现在完成时写出五个句子。

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