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英语:必修2 Unit1 Tales of the unexplained-Grammar课件(译林牛津版)


1.Present Perfect Tense 2.Present Perfect Continuous Tense

Ⅰ、现在完成时 1.现在完成时的构成 1.现在完成时的构成 2.现在完成时的用法 2.现在完成时的用法 Ⅱ、现在完成进行时 1.现在完成进行时的构成 1.现在完成进行时的构成 2.现在完成进行时的用法 2.现在完成进行时的用法 Ⅲ、现在完成时和现在完成进行时的比较

1.现在完成时 现在完成时
1.现在完成时的构成: 1.现在完成时的构成: 现在完成时的构成 主动式: 主动式:have/has done

被动式: 被动式:have/has been done

2.现在完成时的用法 现在完成时的用法

have already opened ?We ___________________(already open) the window. 过去的动作: 过去的动作: we opened the window. 对现在的影响: 对现在的影响: The window is open.

?The boys are tired. They have just played ________________ (just play) a ball game. 过去的动作 : The boys played a ball game. 对现在的影响: The boys are tired.

小结: 小结:
现在完成时用法1---已完成 已完成、 现在完成时用法1---已完成、影响性用法
现在完成时表示过去发生或已完成的动 现在完成时表示过去发生或已完成的动 已完成 作,或某一动作对现在造成的影响或结 或某一动作对现在造成的影响或结 影响 果。通常与表示包括现在在内的时间副 词just, already, before, yet, never, recently等状语连用 等状语连用。 ever, lately, recently等状语连用。 already:用于肯定句; 用于肯定句 用于肯定句; yet:用于否定和疑问句 用于否定和疑问句 用于

? Daniel __________ (live) in Beijing has lived since he came to China.

came
live

has lived

past

now

future

小结: 小结: 现在完成时用法2---未完成用法 现在完成时用法2---未完成用法
现在完成时表示过去已经开始,持续到现在, 现在完成时表示过去已经开始,持续到现在, 过去已经开始 也许还会持续下去的动作或状态。 也许还会持续下去的动作或状态 。 可以和表 示从过去某一时刻延续到现在( 示从过去某一时刻延续到现在 ( 包括现在在 的一段时间的状语连用。 内)的一段时间的状语连用。如: ① for和since, 和 , ② so far, up to now, today, until/till…, this week (month, year) ③ during /over /in the past few years (weeks, months…)

Fill in the blanks: ①. a. She has learnt English for 3 years. b. She has learnt English since 3 years ago. c. They have lived here _____1990. since ② I haven’t seen (see) her so far. has happened ③ What _________________ (happen) to the USA in the past 35 years?

Since 的补充用法
A.主句 主句+since+从句 主句 从句 Great changes have taken place since you left. B. It is +时间段 since+从句 时间段+ 时间段 从句 a. It is / has been two years since I left my hometown. b. It was /had been two years since I had left my hometown. c. It is years since I smoked . d. It is years since I began to smoke .

I went to Egypt in 1986. I went to Egypt in 2004. have been I __________ (be) to Egypt twice.

小结: 小结: 现在完成时用法3---经验性用法 现在完成时用法3---经验性用法
现在完成时可过去发生过一次或多 次的情况,也可以说是一种经历。 次的情况,也可以说是一种经历。

?I haven’t seen (not see) anything so beautiful in my life.

现在完成时知识扩展一
( ) 1. He has come here. √ ( ) 2. He has come here for 3 days. ( ) 3. He hasn’t come here for 3 days. √ ( ) 4. He has stayed here for 3 days. √ ( ) 5. He has been away for 3 days. √

现在完成时知识扩展二
与现在完成时有关的句型: 与现在完成时有关的句型 1)This (That/It) is the first (second…) time + that-clause have seen This is the first time that I _________ (see) pandas 2 )This (That/It) is the only time … + that-clause It is the only time that I_____________ (travel )abroad. have traveled 3)This (That/It) is the best/ finest /most interesting … + that-clause. have tasted It is the most delicious food that I ___________(taste)

Present Perfect Continuous Tense

1.现在完成进行时 现在完成进行时

? The boy started having dinner five minutes ago. He is still having dinner now. has been having ? The boy ________________ (have) dinner since five minutes ago.

?The man started working in the field half an hour ago. He is still working now. has been working ?The man _________________ (work) in the field for half an hour.

现在完成进行时的构成: 现在完成进行时的构成: have/has been doing

小结: 小结:
现在完成进行时用法1 现在完成进行时用法1
现在完成进行时表示过去的动作持续到现在 现在完成进行时表示过去的动作持续到现在 并有可能持续下去. 并有可能持续下去.

CCTV has been broadcasting English programs since 1984.
broadcasted

broadcast

broadcast

1984

now

future

小结: 小结:
现在完成进行时用法2: 现在完成进行时用法2:
现在完成进行时表示过去的动作持续到说话时刚结束。 现在完成进行时表示过去的动作持续到说话时刚结束。 Kelly: Sorry I’m late. Have you been waiting long? Mavis: Yes. I’ve been waiting for an hour.
Mavis started waiting . Kelly arrives.

wait

an hour ago

now

future

3.现在完成时和现在完 3.现在完成时和现在完 成进行时的比较

比较一: 比较一: has read ? Tom __________ (read) a book about Stonehenge. (She finished reading the book.) has been reading ? Tom ________________ (read) a book about Stonehenge. (She is still reading the book.)

did

have done

1.

do

past

now

future

did

have been doing
do

2.

do

past

now

future

比较二: 比较二: have travelled ? I _________________(travel) to Beijing three times. have been travelling ? I ___________________(travel) in Beijing for 3 days.

比较三: 比较三: A __________have you been swimming in the lake? B __________have you swum in the lake? A. How long B. How many times

比较四: 比较四: 1.She has had the pen for 2 years.
state verb

2.She has written many compositions with this pen. action verb 3.She has been writing compositions with this pen. action verb

比较五: 比较五: (√ ) 1.I have never visited America. ( √ ) 2.I have already been to America ( ) 3.I have never been visiting America

比较六: 比较六: ?Who has been eating my apples? (带有感情色彩) 带有感情色彩) ?Who has eaten my apples? (不带有感情色彩, 不带有感情色彩, 只是陈述某事情) 只是陈述某事情)

现在完成时 现在完成进行时 表动作完成 表动作仍然进行 表动作的重复 表动作的持续 表感情色彩 强调动作 强调结果、影响 强调结果、 与动态动词连用 与静态动词连用 与never, ever, yet, already 连用 与how many/much 连用 与how long 连用

√ √ √ √ √ √ √ √ √ √

√ √ √ √ √ √




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