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 帖子主题: 英语动词时态(转发)
 
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发表: 2004-09-02 23:09:16 人气:10279楼主

英语动词时态(转发)

 英语动词时态
(TENSES)
  英语时态是英语语法中的第一道难关,攻下此关是阅读之关键。汉语用不同词表达相应时态,而英语用同一词的确不同变化形式表达时态。
一、      英语各种时态构成表;以play为例;
一般时态    进行时态     完成时态       完成进行时态
现在    play        is          has             has
plays        am playing  have played      have been playing
过去 played      was        had played       had beed playing
                were playing
将来 shall       shall        shall            shall
will play   will be piaying  will have playd   will have been playing
过去should     should         should          should
将来would play  would be playing would have played  would have been playing
二、      一般现在时;
1、      构成;使用动词原形,第三人称单数须有变化。
(1)      直接加“s”,works takes
(2)      以辅音加“y”结尾,变“y”为“i”,再加“es”
carry ――carries
       (3)以“o,s,ch,sh”结尾的动词加“es”
goes  dresses     watches brushes
2.功能;
(1)      表现在的事实,状态或动作;
eg; Birds fly。
    She loves music
Mary‘s parents get up very early
(2)      表示习惯动作或职业,常与often,sometimes,usually,always,every week,
seldom,occasionally,frequently等时间副词连用。
eg;I always take a walk after supper。
She writes to me very often
Tom and his girlfriend go out to take apicnic occasionally。
(3)      表客观真理,格言警句或事实;
The earth moves round the sun。
The sun rises in the east and sets in west。
Two and twomakes fomaMMur。
No man but errs。人非圣贤,孰能无过。
(4)      表将来;
A.      在由when,after,befors,as,as soon as,although,because,if,even if,in case,till      ,until,unless,so long as,where,whatever,wherever等引导的状语从句中用一般现在时表将来发生的动作。(黄金重点,所有考试都不放过它!!!)
例如
I`ll tell her when she comes tomorrow
Even if it rains this afternoon,I`ll meet you。
Whatever happens,you should keep cool-headed(不错的句型,背下!!!)
        I`ll be right here waiting for you wherever you go。(很感人的句型!)
B.      按时间表示将要发生的动作或事件,用一般现在时表达将来时概念。
The play begins at 6;30 this evening。
When does the plane take off?
He leaves for that city next week。
According to the timetable,the express train to Shanghai starts at nine in the  morning(按照时刻表,开往上海的特快列车早上7点出发。)
二.现在进行时;is、am、are+现在分词
1、      表示现在正在进行的动作。如
The kettle is boiling。Shall Imake ted?
Don`t you think you eat too much?You`re putting on weight(体重增加)。
The workers are building a new bridge across the river。
2.  表现阶段正进行的动作。
He istaking physics this semester(本学期)。
We are preparing for our final examination this week。
3、go,come,leave,arrive,land,meet,die,start,return,join,etc。用于进行时态时表示即将开始的动作。
Look!The bus is coming。看!车来了!
The old man is seriously ill,and he is dying。
Alice is leaving for Beijing with her mother。
4、与always,forever,continually,constantly等副词连用,表示说话人带有感情色彩;赞赏或厌恶。
   He is always thinking of others(他总是想着别人。)
   The boy is continually making noises(这男孩不断地发出吵闹声。)
   The teacher is constantly (always)critizing her for being late(老师一直在批评她迟到。)
5、下面表示状态、感觉、情绪、精神活动的动词不可用于进行时。
                 (此条戒律背10遍!!!)
 believe(相信) doubt(怀疑) see(看见) hear(听见) know(知道) understand(理解) belong(属于) think(认为) consider(认为) feel(觉得) look(看起来) seem(看上去) show(显示) mind(介意) have(有) sound(听起来) taste(尝起来) require(要求) possess(拥有) care(关心) like(喜欢) hate(讨厌) love(喜爱) detest(憎恨) desire(意欲)
简单记忆
永远不要说I`m believing。。。或He is seeing a house。再简单一点说,这些动词后面不要随意加—ing。
可怕的是;我们在写作及口语中常犯此类大错!
注意;have a party|think about可以用进行时,因为这里have意为“举行”;think意为“考虑”
三.一般过去时。定义动词的过去试:
1、      表示过去某个特定时间或一段时间发生的动作或情况。
We visited the school last spring。
I went to school by bike when I was in middle school。
China was rounded in 1949。
2、      在表示时间或条件等的状语从句中代替过去将来时(参考)
She told me that she would not go with us if it rained the next day。
They would not leave until she came back。
My fyiend promised to marry me once she made her final decision。
3、      一般过去时,现在时和过去时的几组差异;(别以为很简单,下面的差异你不一定明白。)
Her brother was a chemist。(已去世)
Her brother is a chemist(尚健在)

That`s all I had to say(话已说完)
That`s all I have to say(言之未尽)

It was so nice to see you(离别时用)
It is so nice to see you(见面时用)

Jane did a lot of work this morning(已是当天下午或晚上)
Jane has done a lot of work this morning(仍是上午)
四、      过去进行时;were|was+现在分词
1、      表示过去某一时刻或阶段正在发生的动作。
I was playing chess at 8 yesterday evening。
When I arrived ,they were watching TV。
They were dong housework this time last week。
2、      用于条件状语从句中表示过去将来进行的动作。
She told me to wake him up if she was sleeping。
I asked my friend to warn me about it as long as I was driving too fast
3、      过去某时将发生的事。
They told me that they were leaving for New York。
He was going out when I arrived。
五、      现在完成时;have|has+过去分词
1、      表示过去所发生的动作对现在的影响或产生的结果。常与yet,just,before,recently(最近)ever,never等表示时间的副词搭配使用。
He hasn`t seen her her lately。
I haven`t finished the book yet。
2、      表示一个从过去某个时间开始,延续到现在并可能持续下去的动作,常与表示一段时间的时间状语连用。如;so far(迄今为止),up till now(直到现在),since,for a long time(很长时间),up to present(直到现在),in the past|in the last few years(在过去的几年里),these days(目前)
He has worked here for 15 years。
I have studied English since I came here。
The foreigner has been away from China a long time。
So far,I haven`t received a single letter from my brother。
3、      某些非延续性动词(即;动作开始便终止的动词),在现在完成时中不能与表示一段时间状语搭配。
 黄金要点;
A、      常见的非延续动词;die,arrive(到达),join(加入),leave(离开),go,refuse(拒绝),fail(失败),finish,buy,marry,divorce(离婚),awake(醒),buy,borrow,lend(全部会背)。
B、      这类动词并非不能用现在完成时,而是不能按常由for引导的时间状语。
C、      若是用在否定句中,非延续动词的现在完成时可以与表示一段时间的状语连用。
She has qone away for a month。(误)
She has been away for a month。(正)

The man has died for two years。(误)
The man has been dead for two years(正)

How long have you bought the book?(误)
How long have you qot the book,(正)
4、      注意since的用法;
They haven`t had any trouble since they came here。
It has been ten years since we met last time。
He has been here since 1980。
He has been here since ten years age。
5、      几组对比;
He has gone to Shanghai(他到上海去了)
He has been to Shanghai(他去过上海)。

She has gone。(她已经走了)。
She is gone(or她死了)

The door has been closed(门关上了。表动作)。
The door is closed(门是关着的。表状态)。

六、      现在完成进行时;have|has+been+现在分词
1、      表示从过去某时开始发生,一直延续到现在且可能延续下去的动作(一定要理解这个定义)
I`ve been waiting for an hour but she hasn`t come。
He has been running after her for 8 years。(run after;追求)
2、      表示某种感情色彩。
I`ve been wanting to see you for so many years。
Who`s been telling you such nonsecse。
解惑要点;现在完成时与现在完成进行时的对比;
现在完成时强调结果,而完成进行时强调动作的延续。
I have thought of it。(我已经想到了一点)
I have been thinking of it。(我一直在想这一点)
   Jim has painted the door。(杰姆已将门油漆过了)
Jim has been painting the door。(杰姆一直在油漆门)
七、      过去完成时;had+过去分词
1、      表示过去某个动作或某个具体时间之前已经发生,完成的动作。“过去的过去。”
They had got evenything ready before I came。
The play had begun before I got to the …1theater with my boyfriend。
2、      过去完成时常用于hardly|scarcelhen,no sooner。。。than等固定句型结构中*(意思为;“一。。。就”为重点句型)。
She had hardly|scarcely gone to bed when the bell rang.
No sooner had he arrived at the railway station than he met her parents.(no sooner在句首时句型倒装。)
3、intend(打算),mean(意味),hope(希望) want(想要) plan(计划)等动词的过去完成时用来表示本打算做而没有做的事。
I had intended to call on you yesterday ,but someone came to see me just when I was about to leave(…原想昨天去看你…)
They had planed to hold a football match last week ,but they had to cancel it because the bad  weathe(…原计划上周举行一场足球赛…)
八、      一般将来时;shall|will+动词原型
1、      表示将要发生的动作或存在的状态。
He will graduate form the college next year。
We shall finish our work as quickly as possible。
2、      将来时的其它结构(一定要背下!!!)
.  A。be going to do something 。打算做某事(美国口语中常作be gonna)
I`m going to do buy a new coat this fall。
(be going to 与will的对比;下列情况须用will)
I`ll be sixteen years old next year。
It will be the 20th of August tomorrow。
When he comes ,Iwill give him your message。
B、be+to do sth。表示计划安排做某事或用来征求意见。
   Am I to take over his work ?
   We are to meet at the gate。
C、be about to do sth即将做某事。
   The talk is about to begin。
3、      重点补充;
be on the point of doint sth。正要做某事
set out to do sth 着手做某事
set about doing sth开始做谋事
九、      过去将来时;should|would+动词原形
1、      表示从过去某个时刻看将要发生的动作或状态。
       He said that they would meet me at the station
2、      此用法常用于间接引语中。
十、      过去完成进行时;had been+现在分词
表示过去某个时间之前一直在进行的动作。
   She said that she had been typing a paper before I came in。
比较;
  The girl had cleaned up room,so it was tidy。
  The girl had been clearing up the room ,so we had to wait outside。
十一、将来进行时;shall|will be+分词 。
1、      表示将来某个时刻正在进行的动作;
   What will you be doing this time tomorrow?
比较;
  Tom won`t cut the grass because he is afraid of being tired(说明意图)
  Tom won`t be cutting the grass(无意图、仅陈述事实)
2、      用将来进行时询问别人的计划、打算比用一般将来时更显得有礼貌。
  Will you be having supper with us this evening?
3、      将来进行时表示对即将发生的动作的推测。
  She will be arriving at Shanghai tomorrow morning。
 The car will be going at the speed of 100 miles an hour。
十二、过去将来进行时;should|would be+现在
表示从过去某时看将来某时正在进行的动作。
 He asked me what I should be doing when he came the next day。
十三、将来完成时;shall|will have+现在分词
表示将来某时之前已经完成的动作。
They will have been here for 5 years next Friday。
By the end of next term ,the students will have finished the book。
十四、过去将来完成时;would|should have+过去分词
表示从过去某个时间看将来某时之前已经完成的动作。
He said that they would have arrived by seven o`clock。
十五、将来完成进行时;shall|will have been+现在分词
表示某一动作将继续到将来某时,且该动作此时尚未发生。
We shall have been staying here four weeks when Tom arrives。
It will have been raining ror a week if it does not stop tomorrow。
   (此句型太复杂,人们很少用它,了解就行)

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发表: 2004-09-02 23:29:102

(续)

虚拟语气和情态动词
一、      虚拟语气
英语中有三种语气;陈述语气、祈使语气和虚拟语气。人们根据说话不同需要采用不同的语气。虚拟语气主要用来表示人的主观和假设的意图,
(一)      重点
1、      虚拟语气三大公式
        条件从句            主句
与现在事实相反 If+主语+were(v-ed)     主语+would(should,could,might)+do
〈动词过去式〉
与过去事实相反  If+主语+had done         主语+would(should,could,might)+have done
与将来事实相反  If+主语+should(were to)  主语+would(should,could,might)+do
                        +do  
2、      动词wish后面的宾语从句中谓语动词的虚拟结构;
                与现在事实相反                 与过去事实相反
    wish          v-ed(动词过去式,be用were)      had done
I wish I were handsome。
I wish you didn`t fall ill。
She wished she hadn`t said it。
3、      用于表示意愿、建议、命令等动词后的that宾语从句中;
 suggest建议            demand要求
insist坚持              order命令
ask要求                command命令
desire渴望              propose提议
recomment推荐         advice劝告,忠告
decide决定             maintain坚持
object反对             prefer宁可
move建议,动议       urge强调
The doctor suggested that she not smoke。
She insists that she hear somebody in the room。
The law requires that everyone have his car cheched。
I desire she come tomorrow。
They moved that all civilians(should)be evacuated(撤出)。
4、      在It is|was+某些形容词或过去分词+that引导的主语从句中常用虚拟语气。
   Important重要的           natural自然的
Necessary需要的             orderde命令
   Possible可能的              preferable更可靠的
Requested要求的             recommended推荐的
Better较好的                crucial关键的
Desired盼望的              imperative迫切的
Suggested建议性的          urgent紧迫的
Required要求的             vital至关重要的
It is necessary that you should be present at the discussion。
It was ordered that the medicines be sent here by plane。
It is imperative that you arrive in time。
It will be better that we meet some other time。
It has been decided that the meeting(should)be postponed。
It is insisted that he be punished。
上述形式同样也用于下面两类句型中,一般表示遗憾、惊讶之情;
(1)      It is pity(shame遗憾,incredible难以置信,strange,no wonder)that+should如;
It is strange that she should have failed to see her own shortcoming。
It is incredible that should love her。
(2)I am sorry(surprised,convinced)+should+do(have done)
     I am sorry that she should have made him angry。
5、      下面一些名词后的同位语或表语从句中,要求用should(可省略)+动词原形表示虚拟。
Advice劝告,忠告    order命令
Demand要求         preference偏爱
Decision决定        proposal建议
Request要求        desire愿望,要求
Requirement要求    idea主意,想法
Suggestion建议     recommendation推荐,介绍
His suggestion is that you(should)attend the lecture。
His sole(唯一)requirement is that the system work(起作用)
Your decision that he should be fined (罚款)is reasonable。
6、      虚拟语气的其他几个句型。
(1)      It is(about,high)time+从句,表示早该做而未做的事,含建议的意味。其动词形式用过去式。
   It is high time(that)we began to work。
咱们该开始工作了。
It is(ahout)time that children went to school。
   孩子们该上学去了。
(2)      as if (though)引起的方式状语从句和表语从句中,其动词形式与wish宾语从句中的形式相同。如;
She loves the children in the kindergarden as if they were her children。
Alan talked about Rome as if he had been there。
She looked as if (though)she would cry。
注;as if(though)引起的从句有时也用陈述语气,这时它表示较大的真实性或可能性。
  It looks as if it is going to rain。
(3)      虚拟语气用在“in case”,“lest”,“for fear that”引起的状语从句中表示“以防,以免”。其形式为should+动词原形。如;
He took his raincoat with him in case it should rain。
注;在以上in case类状语从句中的should一般不可省去。但可以用动词陈述语气形式。如;The teacher spoke slowly in case we misunderstood him。
(4)      if only连词后谓语动词用虚拟语气,意思为;“要是,倘若是,只要”着重强凋渴望或惋惜。
If only I had money,I would buy a new car。
If only I had not lost money。要是我没丢钱就好了。
If only he could come!我真希望他能来。
二、      虚拟语气的难点
  1、如果条件句中包含有      were,had,should,可以把if省略,把这几个词放到主语之前,构成主谓倒装。如;
  Were I you,I would not go。
  Were I to meet him tomorrow,I should ask him about it。
  Had he worked harder (=If he had worked harder ),he would have succeed。
 Had he been more careful (=If he had been more careful),such mistakes could have been avoided。
Should you change your mind (=If you should change your mind),no one would blame you。
2、      某些介词短语可以代替if从句,如;but ror,without,under,in case of,but that…
But for the storm ,we should have arrived earlier。
Without water ,nothing could live。
We could have done better under more favourable conditions。
3、      当条件从句表示的动作和主句表示的动作发生的时间不一致时,动词的形式要根据表示的时间来调整。如。若条件从句表示动作与过去是相反,而主句与现在相反时,从句谓语要用had+过去分词,而主句中要用would(should,could,might)+动词原形,如;
 If  I had asked for directions,I wouldn`t get lost now。假如我当初问一下路,现在就不会迷路了。
                  (if说的过去,主句说的是现在)
三、      情态动词
(一)      重点
情态动词的重点主要是can,could,may,might,must,have to,need,dare,should(ought to)。Shall,
should,will,would….
1、      can和could
(1)      表示能力或客观可能性。
Can you speak English?
(2)      在否定、疑问句中表示怀疑或推测。
 Can the news be true?
What he said could not be true。
(3)      表示允许或许可。
 These days children can do what they like。
You can recite the article now。
(4)      can+have+过去分词;在疑问句中表示对过去行为的怀疑或不肯定。
  Can he have passed the exam?(怀疑)
(5)      cannot(couldn`t)+have+过去分词;表示对过去事情的推测。
   They couldn`t have done such things。(推测)。
(6)      could+have+过去分词;表示与事实相反。
   He could have done the jod,but he refused to。(未实现的行为)
注;could尽管是can的过去时,但有时并不表示过去时,只表示语气上的委婉、客气。如;Could I use your dictionary?
如作肯定回答,要用can或nay,而不用could或might。
2、      may和might
(1)      表示请求和允许;May(Might)I…?
  Might I make a suggestion?
  You may use my bike。
(2)表示推测(可表示现在或将来的可能性)“可能“
The story may be interesting。
Do you thing they might come?
(2)      may(might)+have+过去分词;表示对过去的推测,认为某一事情在过去“可能”发生。May和might都指过去,might较为含蓄委婉或更加不肯定。
 He may(might)have missed the plane。
He may(might)not have met them。
(3)      might+have+过去分词;表示未实现的行为。
  You might have done the work better。
You might have left her earlier。
注;may的否定式为may not or mustn`t,后者语气比较强些。一般用mustn`t代替may not,意思为“不可以”,“不准”等。如;
  May I read the book?
 Yes,you may 。No,you mustn`t。
3、      shall和will
(1)      shall
A、  shall用在主语是第一人称或第三人称的疑问句中,表示说话人征求对方的允诺。如;
Shall I fetch a doctor for you?我为你请医生好吗?
Shall he attend the meeting?要他来参加会吗?
B、shall用在主语是第二人称或第三人称陈述句中,表示说话人的允诺和警告。如:
You shall be sorry for what you have done。
He shall get what he wants。
(2)      will
A、      表示“意志”“意愿,如;
We will do our best to get the job done in time。
She can stay home if she will。
B、      表示“请求”如”;
will you please be quiet?
Don`t be late for the meeting,will you ?
4、      dare
(1)      当情态动词用,只能用于疑问句和否定句中。
 He dare not it 。Dare he go?
(2)      当实意动词用,可用于各种句型中。Dare作实义动词用在否定句和疑问句中时,其后接不定式有时可省去“to”如;
  Does he dare to come?
She dares to speak before big audience。
I have never dared(to)speak to him。
Did he dare(to)criticize me?
5、      had better最好,would rather宁愿
否定式;had better not+动词原形;would rather not+动词原形
疑问式;Had you better….?
        Would you rather…?
I would rather go at once。
I would rather not do it。
You had better do it every day。
注;I`d=I would(should)或I had
You`d=you had或You would cannot help+动名词和cannot but +动词原形(都当“不得不”或“不禁”解)。
I cannot help telling him the truth。
She cannot but sing。
(二)      难点
1、      need有三种用法。
A、      need相当普通动词=do,意为require“需要”,“要求”如;
You don`t need to leave so early。
He needs to try one more experiment。
Dose the recorder need repairing?
B、      need相当情态动词,只能用于否定句和疑问句中当“需要”“必要”解。可用于现在时和将来时。在宾语从句中可当过去时用,肯定回答用must(或have to,ought to,should)来表达。否定式为need not。Needn`T如;
Need you go yet?Yes ,I must。NO I needn`t。
C、      needn`t+have+过去分词,表示本来不必做而实际已经做的行为。
You needn`t have told them that。
You needn`t have bought that dictionary。I have a spare one。
2、      must也有三种用法。
A、      must表示命令、强制。否定式mustn`t,将来式have to,过去式had to。如;Cars mustn`t be parked in front of this house。  I had to leave at 6 yeserday。
B、      must表示主观意志和个人决心,意为“应当”、“应该”否定式needn`t,将来式will have to,过去式had to,dian`t need to, did not have to。如;
Must I clean all the rooms?No,you needn`t(或No,you don`t have to)。
C、      must表示推测,判断“必定”“一定”;must be 现在;must have done过去。
  You have worked hard all day;you must be tired。
 I didn`t hear the phone,I must have been asleep。
注;have to与must的区别;同义,但msut表示说话人的主观意志,have to却表示客观需要。
3、      should+have done 表示过去应该做而没有做。
Should`t have done表示“本不应该做某事,而实际却做了”的意思。如;
The plant is dead。I should have watered it。
She shouldn`t Have let the baby play with the scissors。
4、      不同的情态动词家动词不定式的完成式可以表示不同的意思;
(1)      may(might)+have+过去分词;用于肯定句和否定句,表示多已经发生的事情的不肯定的推测,相当于“可能,大概”,其中might较may语气更弱,把握更小。
She might have gone to see her dorctor last week,but I am not sure。
Don`t worry ,your husband may not have been burt seriously。
别急,你丈夫也许伤得不厉害。
(2)      can(could)+have+过去分词;用于过去的时间,说明谋事可能或不可能已发生。如;
I simply can`t undersant how he could have made such a mistake。
This letter can`t have been written by her 。She is only five。
“could+have+过去分词”有时可表示过去可以做谋事,但却未做。如;
He walked there, but he could have taken a taxi。
“couldn`t+have+过去分词”有时表示无论如何也不可能做到。
I couldn`t have called you。 I wasn`t hear a telephone。
(3)      needn`t+have+过去分词;表示不必做的事情却做了,可译为“其实不必”
You needn`t have woken him up。It`s only five。
 

 
 


 
 

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小雨 



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注册:04-12-29 08:56
发表: 2004-12-29 09:17:323

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