Perfect present 用法,例子.
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Perfect present 用法,例子.
现在完成时(Present perfect tense)表示动作发生在过去,但与现在情况有关系,即用一个发生在过去的动作来说明现在的情况.
现在完成时由动词have (has) + 过去分词构成.
现在完成时的基本用法
1)表示动作到现在为止已经完成或刚完成,汉语常用"了"或"过"来表示.如:
I have finished my work.我把工作做完了.
We have set up many new factories in this area.我们在这个地区建立了许多新工厂.
She has read all these books.她把这些书都读完了.
2)动作在过去完成,表示"经验"或"结果".汉语常用"过"来表示.如:
Have you ever seen the play The Doll's House?你看过话剧《傀儡家庭》吗?
Yes,I have seen it twice.我看过两遍了.
I have learnt to drive.我学过开车.
The man has lived in China.那人在中国住过.
[注] 注意be在下面句子中的意义.如:
Where have you been?-I've been to the laboratory.你上哪儿去了?--到实验室去了.
Have you ever been to Hangzhou?―No,I've never been there.你到过杭州吗?--没到过.
How have you been?-I've been well thank you.你近来身体好吗?--谢谢你,我近来很好.
现在完成时与过去一般时的区别
现在完成时和过去一般时都表示在过去完成的动作,但现在完成时强调这一动作与现在的关系,如对现在产生的结果、影响等,而过去一般时则表示动作发生在过去,一般不表示和现在的关系.试比较:
1)I have lost my pen.我把钢笔丢了.(意即还没找到,现在我没有笔用.)
She lost her pen yes today.她昨天把笔丢了.(笔是昨天丢的,现在找到与否,没有说明.)
2)I have been to the Agricultural Exhibition.我看过这个农业展览会.(强调我知道它的内容)
I went to the Agricultural Exhibition last week.我上周参观了这个农业展览会.(只说明我上周参观过展览会这件事)
3) Who has opened the door?谁把门开了?(现在门还开着)
Who opened the door?谁开的门?(指过去,与现在无关.现在门是关着还是开着,没有说明.)
4) A:Have you had your lunch?你吃过年饭没有?(意即你现在不饿吗?)
B:Yes,I have.吃了.(意即我现在饱了,不要再吃了.)
A:When did you have it 你什么时候吃的?(说话人感兴趣的是"吃"这一动作发生在什么时候.)
B:I had it about half an hour ago.我是大约半小时前吃的.
现在完成时的其他用法
1)还可表示动作发生在过去,并且一直延续到现在,甚至还可能继续延续下去.这时常和since所引导的短语或从句或for引导的短语连用(for有时可以省去).
How long have you been in Beijing -I have been in Beijing for four years.你在北京呆了多久?--我在北京呆了四年.
Isaac's father has been a school teacher since 1968.艾萨克的父亲从一九六八年以来就当教师.
We haven't had a vacation for a long time.我们好久没放假了.
Three years have passed since we left school.我们毕业已经三年了.
[注]但在下面的句子中,主句的谓语动词可以用现在一般时.如:
It is three years since I began to work on the state farm.我在国营农场工作已经三年了.(美国英语用has been,下例同此)
It's a long time since I saw you last.好久没见了.
2)在条件、时间状语从句中表示将来完成的动作.
I'll go with you when I have finished my home work,我做完作业后就和你一块去.
We'll wait here until you have Written the letter.我们将在这里等你写完信.
Perhaps I'll know more English after I have learnt it for two years.我学完两午后,懂的英语或许就会多些了.
现在完成时的时间状语问题
1)现在完成时说明的是现在的情况,是现在时态,因此不能和表示过去时间的状语如yesterday,1asr month,three years ago,in l960等连用.这些时间状语只能和过去时态连用,表示过去的动作.但现在完成时可和表示过去时间的副词just和before连用.如:
He has just come.他刚到.
We have seen the movie before,我们以前看过这个电影.
现在完成时由动词have (has) + 过去分词构成.
现在完成时的基本用法
1)表示动作到现在为止已经完成或刚完成,汉语常用"了"或"过"来表示.如:
I have finished my work.我把工作做完了.
We have set up many new factories in this area.我们在这个地区建立了许多新工厂.
She has read all these books.她把这些书都读完了.
2)动作在过去完成,表示"经验"或"结果".汉语常用"过"来表示.如:
Have you ever seen the play The Doll's House?你看过话剧《傀儡家庭》吗?
Yes,I have seen it twice.我看过两遍了.
I have learnt to drive.我学过开车.
The man has lived in China.那人在中国住过.
[注] 注意be在下面句子中的意义.如:
Where have you been?-I've been to the laboratory.你上哪儿去了?--到实验室去了.
Have you ever been to Hangzhou?―No,I've never been there.你到过杭州吗?--没到过.
How have you been?-I've been well thank you.你近来身体好吗?--谢谢你,我近来很好.
现在完成时与过去一般时的区别
现在完成时和过去一般时都表示在过去完成的动作,但现在完成时强调这一动作与现在的关系,如对现在产生的结果、影响等,而过去一般时则表示动作发生在过去,一般不表示和现在的关系.试比较:
1)I have lost my pen.我把钢笔丢了.(意即还没找到,现在我没有笔用.)
She lost her pen yes today.她昨天把笔丢了.(笔是昨天丢的,现在找到与否,没有说明.)
2)I have been to the Agricultural Exhibition.我看过这个农业展览会.(强调我知道它的内容)
I went to the Agricultural Exhibition last week.我上周参观了这个农业展览会.(只说明我上周参观过展览会这件事)
3) Who has opened the door?谁把门开了?(现在门还开着)
Who opened the door?谁开的门?(指过去,与现在无关.现在门是关着还是开着,没有说明.)
4) A:Have you had your lunch?你吃过年饭没有?(意即你现在不饿吗?)
B:Yes,I have.吃了.(意即我现在饱了,不要再吃了.)
A:When did you have it 你什么时候吃的?(说话人感兴趣的是"吃"这一动作发生在什么时候.)
B:I had it about half an hour ago.我是大约半小时前吃的.
现在完成时的其他用法
1)还可表示动作发生在过去,并且一直延续到现在,甚至还可能继续延续下去.这时常和since所引导的短语或从句或for引导的短语连用(for有时可以省去).
How long have you been in Beijing -I have been in Beijing for four years.你在北京呆了多久?--我在北京呆了四年.
Isaac's father has been a school teacher since 1968.艾萨克的父亲从一九六八年以来就当教师.
We haven't had a vacation for a long time.我们好久没放假了.
Three years have passed since we left school.我们毕业已经三年了.
[注]但在下面的句子中,主句的谓语动词可以用现在一般时.如:
It is three years since I began to work on the state farm.我在国营农场工作已经三年了.(美国英语用has been,下例同此)
It's a long time since I saw you last.好久没见了.
2)在条件、时间状语从句中表示将来完成的动作.
I'll go with you when I have finished my home work,我做完作业后就和你一块去.
We'll wait here until you have Written the letter.我们将在这里等你写完信.
Perhaps I'll know more English after I have learnt it for two years.我学完两午后,懂的英语或许就会多些了.
现在完成时的时间状语问题
1)现在完成时说明的是现在的情况,是现在时态,因此不能和表示过去时间的状语如yesterday,1asr month,three years ago,in l960等连用.这些时间状语只能和过去时态连用,表示过去的动作.但现在完成时可和表示过去时间的副词just和before连用.如:
He has just come.他刚到.
We have seen the movie before,我们以前看过这个电影.
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