动词的时态和语态
(一) 动词是谓语动所表示的动作或情况发生时间的各种形式。英语动词有16种时态，但是常用的只有9种：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。下面分别介绍。
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：
a. He goes to school every day.
b. He is very happy.
c.The earth moves around the sun.
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：
a. If you come this afternoon, we’ll have a meeting.
b. When I graduate, I’ll go to 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, come, leave, go ,arrive, start , stop, return, open, close等。例如：
a. The meeting begins at seven.
b. The rain starts at nine in the morning.
4) 表示状态和感觉的动词(be, like, hate, think, remember, find, sound 等)常用一般现在进行时。
a. I like English very much.
b. The story sound very interesting.
5) 书报的标题、小说等情节介绍常用一般现在时。
2.一般现在时的用法
1) 表示过去某时间发生的事、存在的状态或过反复发生的动作。
a. He saw Mr. Wang yesterday.
b. 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”。 I used to smoke. During the vacation I wouldm in the sea.
注：”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。“would + 动词原形”没有 “现在不再……”含义。另外“to be used to +名词(动名词)”表示“习惯于…..”
a. I am used to the climate here.
b. He is used tomming 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 + 动词原形 ”表示即将发生的或最近打算进行的事。
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It is going to rain.
We are going to have a meeting today.
2)“be to + 动词原形” 表示按计划进行或征求对方意见。
The boy is to go to school tomorrow.
Are we to go on with this work?
3) “be about to + 动词原形” 表示即将发生的动作，意为 be ready to do sth. 后面一般不跟时间状语。 We are about to leave.
4) go , come , start, move, sail, leave, arrive ,stay 等可用进行时态表示按计划即将发生的动作。I’m leaving for Beijing.
5) 某些动词(如come, go ,leave, arrive, start, get , stay 等)的一般现在时也可表示将来。
The meeting starts at five o’clock.
He gets off at the next stop.
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 + 现在分词” 构成。另外， “系动词 + 介词或副词” 也表示进行时的意义。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 , here, se, like 等 ) 一般不用进行。
5.过去进行时的用法
1) 过去进行时过去某一时刻、某一阶段正进行的动作，由 “ was (were) + 现在分词”构成。
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 + 过去分词其使用有两种情况：
1) 现在完成时所表示的动作在说话之前已完成，但对现在有影响。句中没有具体时间状语。
He has gone to Fuzhou.
He has been to Fuzhou.
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 wek (month, year ) 等表示包括现在内的状语。
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come, go , die, marry, buy 等)的完成时不能与for, since 等 表示一般时间的词连用。
3)现在完成进行时还可用时间和条件状语从句中，表示将来某时完成的动作。
I’ll go o your home when I have finished my homework.
If it has stopped snowing in the morning, we’ll go to the park.
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7.过去完成时的用法
1) 过去完成时由“had + 过去分词”构成。过去完成时的动作表示过去某一时刻或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。
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。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个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 + 动词原形” 构成。第一人称用should, 其他人称用would.
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)+ been + 现在分词”构成，表示现在以前一直进行的动作。有些动词(work, study, live, teach 等) 用现在完成时与用现在完成时意思差不多。
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表示不同意思
I have been writing a letter.
注意：表示短暂动作的动词(finish, marry, get up, come, go 等)不能用这种时态。
(二) 动词语态
1. 当句子的主语是动作的执行者时， 谓语的形式叫主动语态。句子的主语是动作承受者时，谓语的形式叫被动作语态。被动语态由助动词be + 过去分词构成，时态通过be 表现出来。
1) 一般现在时：You are required to do this.
2) 一般过去时：The story was told by her.
3) 一般将来时：The problem will be discussed tomorrow.
4) 现在进行时：The road is being widened.
5) 过去进行时：The new tool was being made.
6) 现在完成时：The novel has been read.
7) 过去完成时：He said that the work had been finished.
8) 过去将来时：He said that the trees would be planted soon.
2. 一些特殊的被动结构
1) 带情态动词的被动结构：The problem must be solved soon.
2) 带不定式的被动结构：The room is going to be painted.
The homework needs to be done with care.
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3) 短语动词的被动：
a.(不及物)动词+介词：若这类短语动词是及物性的，则可用于被动语态中，如：laugh at, look after, talk about, think of 等。若这类短语动词是不及物性的则不可用于被动语态中，如：book up, look down. 等
b.(及物)动词+副词：bring about, carry out, find out, make out, put away, put off, take up, turn down, turn out, wipe out等
c. 动词+副词 +介词：do away with, face up to, give into ,look down upon, make up with等
d. 动词+名词+介词：catch sight of, keep on eye on, make a fool of , pay attention to , put an end to , set fire/light to , take notice of 等
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