一般现在时和现在完成时的区别?
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一、 一般现在时:
1.概念:经常、反复发生的动作或行为及现在的某种状况.
2.时间状语:always,usually,often,sometimes,every week (day,year,month…),once a week,on Sundays,
3.基本结构:动词 原形 (如主语为第三人称单数,动词上要改为第三人称单数形式)
4.否定形式:am/is/are+not;此时态的谓语动词若为行为动词,则在其前加don't,如主语为第三人称单数,则用doesn't,同时还原行为动词.
5.一般疑问句:把be动词放于句首;用助动词do提问,如主语为第三人称单数,则用does,同时,还原行为动词.
6.例句:.It seldom snows here.
He is always ready to help others.
Action speaks louder than words.
二、 一般过去时:
1.概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为.
2.时间状语:ago,yesterday,the day before yesterday,last week,last(year,night,month…),in 1989,just now,at the age of 5,one day,long long ago,once upon a time,etc.
3.基本结构:be动词;行为动词 的过去式
4.否定形式:was/were+not;在行为动词前加didn't,同时还原行为动词.
5.一般疑问句:was或were放于句首;用助动词do的过去式did 提问,同时还原行为动词.
6.例句:She often came to help us in those days.
I didn't know you were so busy
三、 现在完成时:
1.概念:过去发生或已经完成的动作对现在造成的影响或结果,或从过去已经开始,持续到现在的动作或状态.
2.时间状语:recently,lately,since…for…,in the past few years,etc.
3.基本结构:have/has + done
4.否定形式:have/has + not +done.
5.一般疑问句:have或has.
6.例句:I've written an article.
The countryside has changed a lot in the past few years.
一、 一般现在时:
1.概念:经常、反复发生的动作或行为及现在的某种状况.
2.时间状语:always,usually,often,sometimes,every week (day,year,month…),once a week,on Sundays,
3.基本结构:动词 原形 (如主语为第三人称单数,动词上要改为第三人称单数形式)
4.否定形式:am/is/are+not;此时态的谓语动词若为行为动词,则在其前加don't,如主语为第三人称单数,则用doesn't,同时还原行为动词.
5.一般疑问句:把be动词放于句首;用助动词do提问,如主语为第三人称单数,则用does,同时,还原行为动词.
6.例句:.It seldom snows here.
He is always ready to help others.
Action speaks louder than words.
二、 一般过去时:
1.概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为.
2.时间状语:ago,yesterday,the day before yesterday,last week,last(year,night,month…),in 1989,just now,at the age of 5,one day,long long ago,once upon a time,etc.
3.基本结构:be动词;行为动词 的过去式
4.否定形式:was/were+not;在行为动词前加didn't,同时还原行为动词.
5.一般疑问句:was或were放于句首;用助动词do的过去式did 提问,同时还原行为动词.
6.例句:She often came to help us in those days.
I didn't know you were so busy
三、 现在完成时:
1.概念:过去发生或已经完成的动作对现在造成的影响或结果,或从过去已经开始,持续到现在的动作或状态.
2.时间状语:recently,lately,since…for…,in the past few years,etc.
3.基本结构:have/has + done
4.否定形式:have/has + not +done.
5.一般疑问句:have或has.
6.例句:I've written an article.
The countryside has changed a lot in the past few years.
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一般现在时表示经常性的动作,还有客观事实;现在完成时表示已经完成的动作,且对以后的影响。
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现在一般时与现在完成时
1) I come from Shanghai(上海人)
I have come from Shanghai(从上海来)
2) You read very well. (强调能力)
You‘ve read very well. (强调一次刚完成的动作)
3) I forget.(一时想不起来了)
I have forgotten.(仍没想起来,可能已回忆起来了)
4) The book is written in simple English. (表状态)
The book has been written in simple English.(表动态,已用英语写成)
5) Every time I see him, he‘s been reading. (两个动作不可能同时进行)Every time I have seen him, he‘s been reading. (强调两个动作同时进行)
6) He is gone. (强调状态)He has gone (强调动作和时间)
7) He won‘t come till the play begins. (演出开始时)
He won‘t come till the play has begun.(戏已开始)
8) After I leave school, I‘ll go to college. (两个动作紧密相接)
After I have left school, I‘ll go to college.(强调毕业后,两个动作可能有间隔)
9) It is a long time since I saw you last. It‘s been a long time since I saw you last.(这两句话一样,后一句是美国英语)
10) Where are you? (在哪)Where have you been?(去了哪)
请仔细品位一下 关键看自己理解
1) I come from Shanghai(上海人)
I have come from Shanghai(从上海来)
2) You read very well. (强调能力)
You‘ve read very well. (强调一次刚完成的动作)
3) I forget.(一时想不起来了)
I have forgotten.(仍没想起来,可能已回忆起来了)
4) The book is written in simple English. (表状态)
The book has been written in simple English.(表动态,已用英语写成)
5) Every time I see him, he‘s been reading. (两个动作不可能同时进行)Every time I have seen him, he‘s been reading. (强调两个动作同时进行)
6) He is gone. (强调状态)He has gone (强调动作和时间)
7) He won‘t come till the play begins. (演出开始时)
He won‘t come till the play has begun.(戏已开始)
8) After I leave school, I‘ll go to college. (两个动作紧密相接)
After I have left school, I‘ll go to college.(强调毕业后,两个动作可能有间隔)
9) It is a long time since I saw you last. It‘s been a long time since I saw you last.(这两句话一样,后一句是美国英语)
10) Where are you? (在哪)Where have you been?(去了哪)
请仔细品位一下 关键看自己理解
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看动词的形式 过去式就是过去式
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