英语时态变化？
英语的时态：一般现在时、一般过去时、一般将来时、现在进行时、过去进行时、现在完成时、过去完成时,过去将来时,现在完成进行时1．一般现在时的用法
1)表示经常性、习惯性的动作；表示现在的状态、特征和真理．句中常用 often,usually,every day等时间状语.例如：
He goes to school every day．(经常性动作)
He is very happy．(现在的状态)
The earth moves around the sun．(真理)
2)在时间状语从句和条件状语从句中,用一般现在时表示将来．例如：
If you e this afternoon,we' ll have a meeting．
When I graduate,I’ll go to the countryside.
3)有时这个时态表示按计划、规定要发生的动作,(句中都带有时间状语)但限于少数动词如 begin,e,leave,go,arrive,start,stop,return,open,close等．例如：
The meeting begins at seven.
The train starts at nine in the morning．
4)表示状态和感觉的动词,如 be,like,hate,think,remember,find,sound等常用一般现在时．例如：
I like English very much.
The story sounds very interesting.
5)书报的标题,小说等情节介绍常用一般现在时．
2．一般过去时的用法
l)表示过去某时间发生的事、存在的状态或过去反复发生的动作．
He saw Mr Wang yesterday.
He worked in a factory in 1986
2）表示过去经常发生的动作,也可用“used to”和“would +动词原形”.例如：
I used to *** oke.
During the vacation I would swim in the sea.
注意；used to表示过去常发生而现在不再发生的动作或存在的状态.另外?“to be used to +名词（动句词）“表示”习惯于…….例如
I am used to the climate here.
He is used to swimming in winter．
3.一般将来时的用法
一般将来时表示将来的动作或状态,其表达形式除了“ will或 shall十动词原形”外,还有以下几种形式．
l)“ to be going to十动词原形”,表示即将发生的或最近打算进行的事．例如：
It is going to rain.
We are going to have a meeting today．
2) go,e,start,move,sail,leave等可用进行时态表示按计划即将发生的动作．例如:
I’m leaving for Beijing.
3)“be to十动词原形”表示按计划要发生的事或征求对方意见．例如：
Are we to go on with this work?
The boy is to go to school tomorrow．
4)“ be about to十动词原形”表示即将发生的动作.例如：
We are about to leave．
5)某些词,如 e,go,leave,arrive,start等的一般现在时和现在进行时也可表示将来.
The meeting starts at five o’clock.
He is leaving tomorrow．
4．现在进行时的用法
1)现在进行时表示现在正在进行的动作,由“ to be十现在分词”构成,另外“系动词十介词或副词”也表示进行时的意义．例如：
What are you doing?
The bridge is under construction．
2)表示感觉,愿望和状态的某些动词如 have,be,hear,see,like等词一般不用进行时．
5．过去进行时的用法
l)过去进行时表示过去某一时刻、某一阶段正进行的动作,由“ was(were)十现在分词”构成．例如:
In 1980 he was studying in a university.
He was reading a novel when I came in．
6．现在完成时的用法
现在完成时由“ have十过去分词”构成．其使用有两种情况：
1)现在完成时所表示的动作在说话之前已完成,而对现在有影响．句中没有具体时间状语．例如
He has gone to Fuzhou. (说话人认为他不在该地)
He has been to Fuzhou．(说话人认为他在该地)
2)现在完成时所表示的动作开始于过去,持续到现在,也许还会持续下去．常用for和 since表示一段时间的状语或 so far,now,today, this week( month,year)等表示包括现在时问在内的状语.例如:
He has studied English for 5 years．
He has studied English since 1985．
Now I have finished the work.
注意：表示短暂时间动作的词,如 e,go,die,marry,buy等的完成时不能与for,since等表示一段时间的词连用．
3)现在完成时还可用在时间和条件状语从句中、表示将来某时完成的动作．例如：
I’ll go to your home when I have finished my homework．
If it has stopped snowing in the morning,we’ll go to the park.
7．过去完成时的用法
l)过去完成时由“ had十过去分词”构成.过去完成时的动词表示过去某一时刻或某一动作之前完成的动作或状态．句中常用 by,before,until,when等词引导的时间状语．例如：
By the end of last year we had built five new houses.
I had learnt 5000 words before I entered the university.
2)过去完成时的动词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.例如：
Before he slept,he had worked for 12 hours．
8．过去将来时的用法
过去将来时表示从过去的某时间看来将要发生的动作或存在的状态．过去将来时由“ should或 would十动词原形”构成.第一人称用 should,其他人称用 would．例如：
They were sure that they would succeed．
9．现在完成进行时的用法
现在完成进行时由“ have(has)十 been十现在分词”构成,表示现在以前一直在进行的动作.有些词,如 work,study、live,teach等用现在完成进行时与用现在完成时意思差不多．例如：
I have worked here for three years．
I have been working here for three years.
但多数动词在这两种时态中表示不同意思．例如：
I have written a letter(已写完)
I have been writing a letter．(还在写)
注意：表示短暂动作的动词,如 finish,marry,get up,e,go等不能用这种时态.,1,这个问题好大……,2,现在（一般现在，现在进行。现在完成，现在完成进行）过去（一般过去，过去进行，过去完成，过去完成进行）将来（一般将来，过去将来，将来完成，）,0,
绛旓細鑻辫鐨勫叓绉鏃舵濡備笅锛1.涓鑸幇鍦ㄦ椂锛圫imple present tense锛夛紱2.鐜板湪杩涜鏃讹紙Present progressive tense锛夛紱3.涓鑸繃鍘绘椂锛圫imple past tense锛夛紱4.杩囧幓杩涜鏃讹紙Past progressive tense锛夛紱5.杩囧幓瀹屾垚鏃讹紙Past pertective tense锛夛紱6.鐜板湪瀹屾垚鏃讹紙Present perfective tense锛夛紱7.鐜板湪瀹屾垚杩涜鏃讹紙Present ...
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