现在完成时态与过去时态的区别
现在完成时态与过去时态的区别
1. 意义上的区别
一般过去时态只是单纯地表示过去某一时间发生过的动作或者存在的状态, 和现在没有任何联系, 只着眼于过去.
辣木籽的作用
现在完成时态重点强调与现在的联系, 表示过去发生的动作对现在造成的影响和结果, 属于现在时的范畴.
试比较下列例句:
I have washed my shoes .  我刷过鞋了.
强调的是过去的某一时间发生的动作"洗" 对现在产生的影响是" 鞋是干净的" .
I washed my shoes yesterday . 我昨天刷了鞋.
强调昨天做过"洗" 这个动作, 与现在鞋是否干净没有关系.
My father has bought a new car .  我爸爸买了一辆新车.
强调在过去的某一时间发生的动作"买" , 对现在造成的结果是" 他有了一辆新车".
My father bought a new car last Sunday . 我爸爸上个周日买了一辆新车.
强调上个周日"买" 这个动作发生过, 与爸爸现在是否有车无关. 也许这辆车是给别人的.
中队委竞选稿2. 时间状语的区别
一般过去时态只能与表示过去的时间状语连用, 如 yesterday, last week, three years ago, in 1990 , just now 等.
现在完成时态中的时间状语表达的时间是到现在为止. 如: just 刚刚, before 以前, "since / ever since +过去时间 " 自从...... 开始, ever 曾经, never 从未, 未曾, "already" 已经 , " for+ 时间段"已有多长时间了. in the last/ past ten years 在过去的十年里, so far 到目前为止. up to now 直到现在, this week 这个星期等等.
二者的根本区别在于过去时强调事实,常有具体的时间状语标志,如,lock/this morning,just now,ago etc---,
examples:
1.I met her a week ago.
2.We have a English class this morning.
而完成时有两种用法或意义
1,影响性:也是一个过去动作但却强调它对现在的影响,没具体时间点作时间状语,但常有,
already,yet,before,just作状语。
(1).Have you had your breakfast,yet?(2).I have seen this movie before.
(3).He has just finished his homework.
2.持续性:表动作从过去的一个点开始,一直持续到现在。(现在完成时)如果只需到过去的另一个点就是过去完成时。动词要用延续性的,还常有 for(引导线状时间状语),since(引导点状时间状语)
(1).I have been worked here for 20 years./I have worked here since 20 years ago.
(2).I have been a member of the League for 2 years.这里的be a member of 代替不可延续的动词短语
join the League。
(3).I had been a teacher before I moved here 2 years ago.(过去完成时,表达过去之过
相同点:都是发生在过去。
不同点:过去时只注重此事已发生了;现在完成时强调这件事对现在的影响。比如说:我吃过早饭了。如果你用过去时:I had my breakfast.只是表明吃过早饭了,至于现在饿不饿,还想不想吃点别的,情况不明。但如果你用现在完成时:I have had my breakfast.则表明,我已吃过早饭了,言外之意是:我现在不饿,我现在不想吃别的了。
I已完成用法
表示一个过去发生并结束的动作对现在产生的结果和影响。这一类情况可以细致分为下述两种情况。
1).表示开始于过去的动作刚刚结束。常和just,now,already,yet,not…yet等连用。
Li Ming has just turned off the light.
李明刚刚把灯关上。(说明现在灯关上了)
I've finished my homework now.
现在我已经做完作业了。(说明可以交作业或做别的了)
2). 表示过去动作的结果,现在仍残留着。一般不用时间状语。
I have lost my pen.
我把笔丢了。
(说明过去某时丢的,现在我还没到这支笔)
She has become a teacher.
她已经当了老师。(说明她现在仍是老师)
She has become a teacher.
她已经当了老师。(说明她现在仍是老师)
II未完成用法。表示过去已经开始,持续到现在,而且还能继续下去的动作或状态。往往和表示一段
时间的状语连用。如today,this week(month),lately,recently,these days,in the past few days,during the last two weeks. since,since yesterday,since 2 days ago,since 1991,for a longtime,for a month,so far,up to now,till(until) now等。
He has lived here for 30 years.
他住在这儿三十年了。(现在还住在这儿)
They've known each other since childhood.
他们从小彼此相识。(现在还继续往来)
How long have you studied English?
你学英语多久了?(现在仍在学)
III经验性用法。表示从过去到现在之间曾经经历过的事情。一般译为汉语“过”,常和often,never,ever,once,twice,three times,before,since 等连用。
I have been to the Summer Palace twice.
我曾经去过颐和园两次。
We have visited your school before.
我以前曾去过你们学校。
(过去的经历,但现在依然记得)
小q评价二,现在完成时的时间状语
I现在完成时属于现在时范围,故不能和过去的时间状语连用。如:yesterday,last Sunday,in1990,three years ago等。但是,在强调动作产生的后果和影响时,可以和一些表示不确定的时间状语连用。
a. 用副词already和yet。already一般用于肯定句中,yet一般用于否定句和疑问句中。如:We have already finished our homework.我们已完成作业了。
They haven't finished their homework yet.他们还没有完成作业。
b.用ever 和never。多用于否定或疑问句中,表示“曾经”或“从未“等。如:
-
Have you ever been to the Great Wall?你曾经去过长城吗
-I have never been to the Great Wall.我从未去过长城。
c.用表示到说话为止的过去时间状语,如just,before,up to now,the past few years等。例如:I have seen her before,but I can not remember where.
我以前见过她,但记不起在哪里见过。
He has been there three times the last few days.
近几年他去过那里三次了。
d.用包括“现在”在内的时间状语,如:now,today,this
morning(month,year,term)等。例如:-Have you met him today?-No,I
haven't.
今天你见过他吗?我没有。
How many times have you been there this year?
今年你去过那里多少次?
II短暂性动词不能和表一段时间的时间状语连用。如:come, go, arrive, reach, see,
hear, close, leave, begin, start, lose, buy, close, fall, join, die, get up等。但如果要保留表一段时间的时间状语,必须将动词改为延续性动词。
现归纳总结一下由非延续性动词到延续性动词的转换,如:
fall asleep (ill) →be asleep(ill) get to know→ know
begin,(start)→ be on open →be open
buy→ have get up→ be up
die→ be dead go out→ be out
come→ be in close→be closed
arrive→be here join→be in, be a +名词
finish( end )→be over leave, move →be away, be out of
borrow →keep go to school→be a student
catch(a cold)→ have(a cold) begin to study→study
come back→be back put on→wear 或be on
如:He has been a soldier for three years.他参军三年了。
His father has been dead for two years.他父亲去世二年了。
The film has been on for ten minutes.电影已开始十分钟了。
We have studied English for three years. 我们(开始)学英语已三年了。
三,,现在完成时和一般过去时的区别
现在完成时和一般过去时都表示在过去完成的动作。但现在完成时强调的是这一动作与现在的关系。如对现在产生的结果或影响等,而一般过去时只表示动作在
过去某一时刻发生,不表示和现在的关系。试比较:  I have lost my new book. 我把新书丢了。(现在还未到)
I lost my new book yesterday. 我昨天把新书丢了。(昨天丢的,现在到与否没说明)
The light has gone out.灯已经息了.(现在尚未亮)
The light gone went out.灯曾经息过.(现在已亮了)
四,.几点注意事项
I. have been(to)与have gone( to)的区别:have been(to)表示“去过某地(现在已经回来了)”,可用于各人称;have gone(to)表示“去某地了(说话时某人不在当地)”,常用于第三人称,前者可与once ,never,several times等连用,后者则不能。如:
They have been to Beijing twice.他们去过北京两次。
He has gone to Beijing . 他去北京了。
II.如单纯表示一段时间,或强调一段时间,虽有since一词,也不必用完成时。如:
恢复好友qq网站It is two years since his father died. =His father has been dead for two years.他父亲去世已有三年了。
Ⅲ.不可延续性动词现在完成时的否定式,已变成一种可以延续的状态,因此可以和表示一段时间的状语连用。
如:
I haven't left here since 1997.自从1997年以来,我一直没有离开过这儿。
(错)I have received his letter for a month.
(对)I haven't received his letter for almost a month.
五, 用于现在完成时的句型
Ⅰ.It is the first / second time…. that…结构中的从句部分,用现在完成时。
It is the first time that I have visited the city.
It was the third time that the boy had been late.
Ⅱ.This is the… that…结构,that 从句要用现在完成时.
This is the best film that I've (ever) seen.
这是我看过的最好的电影。
This is the first time (that) I've heard him sing. 这是我第一次听他唱歌。
典型例题:
(1) ---Do you know our town at all?
---No, this is the first time I ___ here.
A. was
B. have been
C. came
王国维的三种境界D. am coming
答案B. This is the first time 后面所加从句应为现在完成时,故选B。
(2) ---Have you ____ been to our town before?
保国会-
--No, it's the first time I ___ here.
A. even, come
B. even, have come
C. ever, come
D. ever, have come
答案D. ever意为曾经或无论何时,反意词为never,此两词常用于完成时。This is the largest fish I have ever seen. It is / was the first time
+that-clause 的句型中,从句要用完成时。
、什么叫过去完成时?它是怎样构成的?
过去完成时表示一个动作或状态在过去某一时间或动作之前已经完成或结束,也可能是早已完成或结束,即“过去的过去”;也可以指过去的动作延续到过去的某个时刻。
过去完成时由“had +动词的过去分词”构成, had通常用于任何人称。
二、过去完成时有哪些用法?
过去完成时主要有以下几点用法:
1. 表示过去某一时间或动作之前已经发生或完成的动作或存在的状态。句中常用by, before, when, until等词引导的时间状语。它是以过去某一时间为起点,所以过去完成时是一个相对的时态,表示的是“过去的过去”。只有和过去某时间或某动作相比较时才能用到它。例如:
Most of the guests had left when he arrived at the party. 当他到达晚会时,他发现大多数客人已经离开了。
2.过去完成时还可表示过去某一时刻之前发生的动作或状态持续到过去某个时间或持续下去,常与for, since等词连用。例如:
When Jack arrived, he learned Mary had been away for almost an hour. 当杰克到时,他得知玛丽已经离开快一个小时了。
3. 用于并列句:一个并列句用的是过去式,如果另一个并列句表示的动作早于过去式这一动作,这时需用过去完成时。例如:
Tom flew home, but his father had already died.汤姆乘飞机回家,他的父亲却已经去世了。
4. 某些动词的过去完成时表示过去未实现的希望、计划或打算。常用的动词有hope, expect, suppose, think, want, wish等。例如:
They had hoped to be able to arrive before ten. 他们本来打算能在10
点之前到达。