过去时和完成时的区别是什么?
发布网友
发布时间：2023-08-22 11:59
共3个回答
热心网友
时间：2024-11-19 03:23
热心网友
时间：2024-11-19 03:23
结构：“主语+动词的过去式”
通常一般过去式带有表示动作时间状语的词，词组或从句,如 yesterday, the day before last, last week, two days ago 等
1.表示过去某个时间发生的动作或存在的状态。
My mother was at work yesterday afternoon.
Did you have a good time last summer?
2.表示过去经常或反复发生的动作。
My mother often went to work by taxi last year.
When I was a student, I often listened to music.
3. 常与一般过去时态连用的时间有：
at that time, then, at that moment, yesterday, yesterday morning (afternoon, evening…)last night (week, month, year…),一 段时间+ago(several days ago), two days ago, a week ago, three years ago…in 1990, (in 1997…) ,just now, long before, long, long ago
现在完成时是英文时态的一种 ：have(has)+过去分词(done) 强调动作在过去某点发生并持续到现在，对现在有影响。
1. 现在完成时用来表示现在之前已发生过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.
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.)
He has returned from abroad. (含义是:现在已在此地)
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.
Mary has been ill for three days.
I have lived here since 1998.
3. 现在完成时往往同表示不确定的过去时间状语连用,如already, yet, just, before, recently, lately等:
I haven't seen much of him recently (lately).
We have seen that film before.
Have they found the missing child yet
4. 现在完成时常常与表示频度的时间状语连用,如often, sometimes, ever, never, twice, on several occasion等:
Have you ever been to Beijing
I have never heard Bunny say anything against her.
5. 现在完成时还往往可以同包括现在时间在内的时间状语连用,如now, up to these few days/weeks/months/years, this morning/week/month/year, now, just, today, up to present, so far等:
Peter has written six papers so far.
Man has now learned to release energy from the nucleus of the atom.
There has bee too much rain in San Francisco this year.
The friendly relations and cooperation between our two countries have been enhanced in the past few years.
Up to the present everything has been successful.
6. 现在完成时表示现在之前业已完成的动作,虽然其效果或影响仍然存在但已不再继续,但是有一些现在完成时的句子,在后面加上for+一段时间,则现在完成时的动作就表示延续性.
Thomas has studied Russian. (现在不再学俄语)
Thomas has studied Russian for three years. (=Thomas began to study Russian three years ago, and is still studying it now.(同第2点用法第一个例句)
7. 现在完成时还可以用来表示过去的一个时间到现在这段时间内重复发生的动作.
We have had four texts this semester.
热心网友
时间：2024-11-19 03:24
完成时强调的是 该动作对现在的影响 侧重点不同
