英语高手 帮帮忙！！！ 急急！！明天就要！！
英语高手帮帮忙，拜托！！明天下午就要交作业了~！~
1） 概念：表示过去的过去
----|-------|-----|---->其构成是had +过去分词构成。
那时以前 那时 现在
2） 用法
a. 在told, said, knew, heard, thought等动词后的宾语从句。
She said (that) she had never been to Paris.
b. 状语从句
在过去不同时间发生的两个动作中，发生在先，用过去完成时；发生在后，用一般过去时。
When the police arrived, the thieves had run away.
c. 表示意向的动词，如hope, wish, expect, think, intend, mean, suppose等，用过去完成时表示"原本…，未能…"
We had hoped that you would come, but you didn't.
3) 过去完成时的时间状语before, by, until , when, after, once, as soon as。
He said that he had learned some English before.
By the time he was twelve, Edison had began to make a living by himself.
Tom was disappointed that most of the guests had left when he arrived at the party.
典型例题
The students ___ busily when Miss Brown went to get a book she ___ in the office.
A. had written, left B，were writing, has left C. had written, had left D. were writing, had left
答案D. "把书忘在办公室"发生在"去取书"这一过去的动作之前，因此"忘了书"这一动作发生在过去的过去，用过去完成时。句中when表示的是时间的一点，表示在"同学们正忙于……"这一背景下，when所引导的动作发生。因此
前一句应用过去进行时。
注意： had no … when 还没等…… 就……
had no sooner… than 刚…… 就……
He had no sooner bought the car than he sold it.
比较过去时与现在完成时
1）过去时表示过去某时发生的动作或单纯叙述过去的事情，强调动作；现在完成时为过去发生的，强调过去的事情对现在的影响，强调的是影响。
2）过去时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语连用，或无时间状语。
一般过去时的时间状语:
yesterday, last week，…ago, in1980, in October, just now, 具体的时间状语
共同的时间状语:
this morning, tonight,this April, now, once，before, already, recently，lately
现在完成时的时间状语
for, since, so far, ever, never, just, yet, till / until, up to now, in past years, always,
不确定的时间状语
3）现在完成时可表示持续到现在的动作或状态，动词一般是延续性的，如live, teach, learn, work, study, know.
过去时常用的非持续性动词有come, go, leave, start, die, finish, become, get married等。
举例：
I saw this film yesterday.
（强调看的动作发生过了。）
I have seen this film.
（强调对现在的影响，电影的内容已经知道了。）
Why did you get up so early?
（强调起床的动作已发生过了。）
Who hasn't handed in his paper?
（强调有卷子，可能为不公平竞争。）
She has returned from Paris.
她已从巴黎回来了。
She returned yesterday.
她是昨天回来了。
He has been in the League for three years.
(在团内的状态可延续)
He has been a League member for three years.
(是团员的状态可持续)
He joined the League three years ago.
( 三年前入团，joined为短暂行为。)
I have finished my homework now.
---Will somebody go and get Dr. White?
---He's already been sent for.
句子中如有过去时的时间副词（如 yesterday, last, week, in 1960）时，不能使用现在完成时，要用过去时。
（错）Tom has written a letter to his parents last night.
（对）Tom wrote a letter to his parents last night.
现在完成时(The Present Perfect Tense)
1. 动作发生于一个非确定的过去的时间(过去的时间并不重要或根本不知道),但它的结果仍对现在有影响.
I have read the letter, and I know what it is about.
2. 动作发生在过去,目前仍在继续或刚刚结束, 常和 "for" 加上 "一段时间", 或"since" 加上"一个确切的过去的时间" 连用.
a) "for" 用于过去的一段时间. (动词必须是可以延续的)
He has been there for six months. 她去那儿有6个月了。
(直到现在)
He went there 6 months ago.
He has never been there. 他从来都没去过那里。(直到现在)
b) "since" 用于过去的一个确切的时间, 意思是"从那时一直到现在", 总是和完成
时一齐用, 而且不能省略. (主句动词必须是可以延续的)
Tim has been in Nantong since January. 自从1月份以来他一直都在南通。(现在仍在南通)
注意: "since" 后面的确切的过去的时间也可以是一个含有过去时的从句.
He has been interested in collecting coins since he was a child.
他打小时侯起就对收集硬币感兴趣。（现在还是如此）
c) 现在完成时常和短语 "up to now /till now", "so far" (意思是从过去某一确定的时间一直延续到现在.)
Up to/till now he's read many story books. 至今他已读过好多故事书。
I've been to New York three times so far. 至今我已到纽约去过三次。
3. 刚刚完成的动作.
I've just got a letter from my brother.
4. "already" 用于现在完成时的肯定句中, "yet" 用于现在完成时的否定句和疑问句中
He has (already) visited many places in China. (already)
He has come back now. Have you ever been to Australia?
注意 "already" 在句中的两种位置.
The train hasn't arrived yet.火车（到现在）还没有到。
Has she arrived yet? 她已经到了吗？Hasn't he come yet? 她还没来吗？
I haven't been very successful so far.我一直都没有成功。
注意: "have been"（去过） 和 "have gone"（去了） 的区别:
He has gone to Beijing . (He is there or is on his way there.)
He has been to Shanghai . (He was there once, but he is not there now.)
5. 当现在完成时句中无时间状语, 它只是指一个简单的已经完成的动作
I've cleaned the sitting-room. 我已把起居室打扫过了。(已完成了工作)
6. 现在完成时可以用来表示一个反复发生的动作.
He has rung me up five times today. (五次分隔的行为)
8. 一般过去时(常带有确切的表示过去的时间状语)和现在完成时的比较:
When did you stay at this hotel?
I stayed here five years ago.
Have you ever stayed at this hotel?
Yes, I've stayed here twice. (无确切的过去的时间状语)
Yes, I stayed here for two months. (过去的一段时间, 我已不在那儿.)
Yes, I stayed here five years ago. (有确切的过去的时间状语)
How long have you been staying at this hotel?仍在这儿)
9. 通常和现在完成时一起用的副词:
I have just got a letter from my brother.
He has already bought an American car and has gone to the U.S.A.
He has been there for six months so far.
Mother has never been abroad before.
常和完成时连用的副词和实践短语：
already, yet, just, ever, never, before
today, now, this morning, this week, these days, in the past two years
for three hours, for two weeks, for years, for a long time
since three o'clock, since last Tuesday, since 1980, since then
since he came here, since we began to learn English
过去完成时
1） 概念：表示过去的过去,其构成是had +过去分词构成。
2） 用法
a. 在told, said, knew, heard, thought等动词后的宾语从句。
b. 状语从句
在过去不同时间发生的两个动作中，发生在先，用过去完成时；发生在后，用一般过去时。
c. 表示意向的动词，如hope, wish, expect, think, intend, mean, suppose等，用过去完成时表示"原本…，未能…"
3) 过去完成时的时间状语before, by, until , when, after, once, as soon as。
现在完成时
表示
1）过去发生或已经完成的动作或存在的状态对现在造成的影响或结果．（即它的”完成用法”）
2)过去已经开始，一直持续到现在的动作或状态。注意：此时动作可能还要继续。（即它的”未完成用法”）。
其结构是“have/has+过去分词”。过去分词的变化分规则与不规则两种。规则变化与过去式相同，不规则变化需要另记。
它的否定句是在have/has后边加not，变一般疑问句是把have/has提前。
它的时间状语通常为already, just, yet, ever, never, before等。另外还可和since+表过去的时间点，for+时间段连用。
我晕！
上面的你是不是要把整个文章都搬下来啊？？
过去完成式是：已经发生了，而且是过去了的事
现在完成式是：正在发生的事，或者是正在发生还没有完成的事。现在完成时要在后面加-ing
差不多就是这样吧，有问题再问吧
过 去完成时是指已经发生的 现在完成时是指正在进行的 一般现在进行时后面加ing的
1. People usually think that language is the vehicle of culture, hence to kill language is the same with to kill the culture.
2. The thing that has to be pointed out is that English Globalization will result in a homogenous world where language diversity will be destroyed.
3. Whether the government shoud sponsor the traditioanl artists and musicians has become the concern of the public.
4. The impact of tourism upon the local culture is obvious.
1. We often play in the playgound.我们经常在操场上玩耍。
2. He gets up at six o’clock.他六点钟起床。
3. Do you brush your teeth every morning.你每天草上都刷牙吗？
4. What does he usually do after school?他放学后一般会做什么？
5. Danny studies English,Chinese,Maths,Science and Art at school.丹尼在学校学习英语、中文、数学、科学和艺术。
6. Mike sometimes goes to the park with his sister.米克有时会和他的妹妹去公园。
7. At eight at night, she watches TV with his parents.晚上8点她跟父母一起看电视。
8.Does Mike read English every day?米克每天都读英语吗？
9.How many lessons does your classmate have on Monday?星期一您的同学要上几节课啊？
10. What time does his mother do the housework?你妈妈一般什么时候做家务？
表示每天或者经常做的事 ，全都用一般现在时态 。
1） 概念：表示过去的过去
----|-------|-----|---->其构成是had +过去分词构成。
那时以前 那时 现在
2） 用法
a. 在told, said, knew, heard, thought等动词后的宾语从句。
She said (that) she had never been to Paris.
b. 状语从句
在过去不同时间发生的两个动作中，发生在先，用过去完成时；发生在后，用一般过去时。
When the police arrived, the thieves had run away.
c. 表示意向的动词，如hope, wish, expect, think, intend, mean, suppose等，用过去完成时表示"原本…，未能…"
We had hoped that you would come, but you didn't.
3) 过去完成时的时间状语before, by, until , when, after, once, as soon as。
He said that he had learned some English before.
By the time he was twelve, Edison had began to make a living by himself.
Tom was disappointed that most of the guests had left when he arrived at the party.
典型例题
The students ___ busily when Miss Brown went to get a book she ___ in the office.
A. had written, left B，were writing, has left C. had written, had left D. were writing, had left
答案D. "把书忘在办公室"发生在"去取书"这一过去的动作之前，因此"忘了书"这一动作发生在过去的过去，用过去完成时。句中when表示的是时间的一点，表示在"同学们正忙于……"这一背景下，when所引导的动作发生。因此
前一句应用过去进行时。
注意： had no … when 还没等…… 就……
had no sooner… than 刚…… 就……
He had no sooner bought the car than he sold it.
比较过去时与现在完成时
1）过去时表示过去某时发生的动作或单纯叙述过去的事情，强调动作；现在完成时为过去发生的，强调过去的事情对现在的影响，强调的是影响。
2）过去时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语连用，或无时间状语。
一般过去时的时间状语:
yesterday, last week，…ago, in1980, in October, just now, 具体的时间状语
共同的时间状语:
this morning, tonight,this April, now, once，before, already, recently，lately
现在完成时的时间状语
for, since, so far, ever, never, just, yet, till / until, up to now, in past years, always,
不确定的时间状语
3）现在完成时可表示持续到现在的动作或状态，动词一般是延续性的，如live, teach, learn, work, study, know.
过去时常用的非持续性动词有come, go, leave, start, die, finish, become, get married等。
举例：
I saw this film yesterday.
（强调看的动作发生过了。）
I have seen this film.
（强调对现在的影响，电影的内容已经知道了。）
Why did you get up so early?
（强调起床的动作已发生过了。）
Who hasn't handed in his paper?
（强调有卷子，可能为不公平竞争。）
She has returned from Paris.
她已从巴黎回来了。
She returned yesterday.
她是昨天回来了。
He has been in the League for three years.
(在团内的状态可延续)
He has been a League member for three years.
(是团员的状态可持续)
He joined the League three years ago.
( 三年前入团，joined为短暂行为。)
I have finished my homework now.
---Will somebody go and get Dr. White?
---He's already been sent for.
句子中如有过去时的时间副词（如 yesterday, last, week, in 1960）时，不能使用现在完成时，要用过去时。
（错）Tom has written a letter to his parents last night.
（对）Tom wrote a letter to his parents last night.
现在完成时(The Present Perfect Tense)
1. 动作发生于一个非确定的过去的时间(过去的时间并不重要或根本不知道),但它的结果仍对现在有影响.
I have read the letter, and I know what it is about.
2. 动作发生在过去,目前仍在继续或刚刚结束, 常和 "for" 加上 "一段时间", 或"since" 加上"一个确切的过去的时间" 连用.
a) "for" 用于过去的一段时间. (动词必须是可以延续的)
He has been there for six months. 她去那儿有6个月了。
(直到现在)
He went there 6 months ago.
He has never been there. 他从来都没去过那里。(直到现在)
b) "since" 用于过去的一个确切的时间, 意思是"从那时一直到现在", 总是和完成
时一齐用, 而且不能省略. (主句动词必须是可以延续的)
Tim has been in Nantong since January. 自从1月份以来他一直都在南通。(现在仍在南通)
注意: "since" 后面的确切的过去的时间也可以是一个含有过去时的从句.
He has been interested in collecting coins since he was a child.
他打小时侯起就对收集硬币感兴趣。（现在还是如此）
c) 现在完成时常和短语 "up to now /till now", "so far" (意思是从过去某一确定的时间一直延续到现在.)
Up to/till now he's read many story books. 至今他已读过好多故事书。
I've been to New York three times so far. 至今我已到纽约去过三次。
3. 刚刚完成的动作.
I've just got a letter from my brother.
4. "already" 用于现在完成时的肯定句中, "yet" 用于现在完成时的否定句和疑问句中
He has (already) visited many places in China. (already)
He has come back now. Have you ever been to Australia?
注意 "already" 在句中的两种位置.
The train hasn't arrived yet.火车（到现在）还没有到。
Has she arrived yet? 她已经到了吗？Hasn't he come yet? 她还没来吗？
I haven't been very successful so far.我一直都没有成功。
注意: "have been"（去过） 和 "have gone"（去了） 的区别:
He has gone to Beijing . (He is there or is on his way there.)
He has been to Shanghai . (He was there once, but he is not there now.)
5. 当现在完成时句中无时间状语, 它只是指一个简单的已经完成的动作
I've cleaned the sitting-room. 我已把起居室打扫过了。(已完成了工作)
6. 现在完成时可以用来表示一个反复发生的动作.
He has rung me up five times today. (五次分隔的行为)
8. 一般过去时(常带有确切的表示过去的时间状语)和现在完成时的比较:
When did you stay at this hotel?
I stayed here five years ago.
Have you ever stayed at this hotel?
Yes, I've stayed here twice. (无确切的过去的时间状语)
Yes, I stayed here for two months. (过去的一段时间, 我已不在那儿.)
Yes, I stayed here five years ago. (有确切的过去的时间状语)
How long have you been staying at this hotel?仍在这儿)
9. 通常和现在完成时一起用的副词:
I have just got a letter from my brother.
He has already bought an American car and has gone to the U.S.A.
He has been there for six months so far.
Mother has never been abroad before.
常和完成时连用的副词和实践短语：
already, yet, just, ever, never, before
today, now, this morning, this week, these days, in the past two years
for three hours, for two weeks, for years, for a long time
since three o'clock, since last Tuesday, since 1980, since then
since he came here, since we began to learn English
过去完成时
1） 概念：表示过去的过去,其构成是had +过去分词构成。
2） 用法
a. 在told, said, knew, heard, thought等动词后的宾语从句。
b. 状语从句
在过去不同时间发生的两个动作中，发生在先，用过去完成时；发生在后，用一般过去时。
c. 表示意向的动词，如hope, wish, expect, think, intend, mean, suppose等，用过去完成时表示"原本…，未能…"
3) 过去完成时的时间状语before, by, until , when, after, once, as soon as。
现在完成时
表示
1）过去发生或已经完成的动作或存在的状态对现在造成的影响或结果．（即它的”完成用法”）
2)过去已经开始，一直持续到现在的动作或状态。注意：此时动作可能还要继续。（即它的”未完成用法”）。
其结构是“have/has+过去分词”。过去分词的变化分规则与不规则两种。规则变化与过去式相同，不规则变化需要另记。
它的否定句是在have/has后边加not，变一般疑问句是把have/has提前。
它的时间状语通常为already, just, yet, ever, never, before等。另外还可和since+表过去的时间点，for+时间段连用。
我晕！
上面的你是不是要把整个文章都搬下来啊？？
过去完成式是：已经发生了，而且是过去了的事
现在完成式是：正在发生的事，或者是正在发生还没有完成的事。现在完成时要在后面加-ing
差不多就是这样吧，有问题再问吧
过 去完成时是指已经发生的 现在完成时是指正在进行的 一般现在进行时后面加ing的
