外研社版高一英语必修一 第四单元PPT教学课件

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1. ---How long ago did you part from each other?
---It ______ five years since we said goodbye to each other.
A.was
B. would be
C.had been D.has been
外研版
Module 4
第一册
grammar:
present perfect tense
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Study the following sentences:
1. Who has opened the door?
2. My watch has stopped
3. They haven’t completed that experiment yet.
A.was leaving B. has left
C. would leave D.left
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4.--- How long _____ at this job? --- Since 1990. A. were you employed B. have you been employed C. had you been employed D.will you be employed
4.Perhaps she made several friends by now.
Perhaps she has made several friends by now.
5. When have you bought this computer?
When did you buy this computer?
6. He has worked in the company since he came to the city.
7.So far he has written five books.
8. It has been years since I came here.
(An action beginning in the past and still continuing)
I have lost my wallet.
(含义是:现在我没有钱花了.)
Jane has laid the table. (含义是:已可以吃饭了.)
Michael has been ill.
(含义是:现在仍然很虚弱)
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2.现在完成时可以用来表示发生在过去某一 时刻的,持续到现在的情况,常与for,since连 用.
the past ten years,
during
the past ten years,
in the
last few months,
during the
last few months
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1.现在完成时用来表示现在之前已百度文库生或完 成的动作或状态,但其结果却和现在有联系, 也就是说,动作或状态发生在过去但它的影 响现在还存在.
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Find the mistakes in the following sentences and correct them: 1.He has come back for three weeks.
(He came back three weeks ago. He has been back for three weeks.) 2.I have joined the army for ten years.
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Form: have/has done
Usage: 1. An action completed in the past but connected with the present situation.
2. An action beginning in the past and still continuing
(I have been in the army for ten years.
I joined the army ten years ago.
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3. We achieved great success in the past few years.
We have achieved great success in the past few years.
4. He has already returned that book. (An action completed in the past but connected with the present situation. )
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5. I have studied English for three years/since1999.
2. ---Who broke the glass?
3. ---Sorry .I_____.
A. have done B. did C. broke D.am
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3. --- How long has he been away ,do you know?
--- Sorry ,I can’t tell exactly when he ____, though I know he has already been away.
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Sum up: The following words and phrases often appear in the present perfect tense.
already, just, yet, lately,
recently, ever, rarely, since, so far, up to now, by now, in
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5. --- How are you feeling today?
6. --- Oh, I ____ as ill as I do now for a week.
7. A. didn’t feel B. wasn’t feeling
8. C. don’t feel D. haven’t felt