英语五个基本的时态
一文看懂英语的12个时态

一文看懂英语的12个时态1、现在时态(Simple Present)这个时态描述的是现在正在发生或每个时间段都发生的事情。
它是通过动词的原形加“-s”或“-es”来构成。
例如:•I eat breakfast every day.(我每天吃早饭。
)•She always drinks coffee in the morning.(她每天早上总是喝咖啡。
)•He goes to the gym three times a week.(他每周去三次健身房。
)2、过去时态(Simple Past)这个时态描述的是过去发生过的事情,通常有一个确切的时间或者时间段。
它是通过动词的过去式来构成。
例如:•I walked to the store yesterday.(我昨天步行去了商店。
)•We visited our grandparents last weekend.(上个周末我们去看望了我们的祖父母。
)•She danced at the party until midnight.(她在派对上跳舞跳到了半夜。
)3、将来时态(Simple Future)这个时态描述的是将来要发生的事情。
它可以使用“will + 动词的原形”或“be going to + 动词的原形”来构成。
例如:•I will study hard for the test next week.(我下周会为考试努力学习。
)•She is going to travel to Europe next summer.(她下个夏天要去欧洲旅行。
)•They will have their graduation ceremony next month.(他们下个月会举行毕业典礼。
)4、现在进行时态(Present Continuous)这个时态描述的是正在进行的动作或状态。
它是通过be动词(am/is/are)加上动词的现在分词(-ing形式)来构成。
英语的各种时态

(一)一般现在时: 主+谓(is/am/are/do/does)+宾1. 表示经常性或习惯性动作: We always care for each other and help each other.2. 表示现在的特征或状态He is very happy.3. 表示普遍真理Light travels faster than sound. 光速比声速快。
(二)一般过去时: 主+谓(was/were/did)+宾1. 表示过去某一特定时间所发生的、可完成的动作或状态,常与表示确切过去时间的词、短语或从句连用。
例如:We went to the pictures last night and saw a very interesting film.2. 表示过去习惯性动作。
例如:I used to do my homework in the library.(三)一般将来时:①主+谓(is/am/are going to do)+宾;②主+wiil +do+ sth ;③主+be (is/am/are) about to do sth1. 表示将来打算进行或期待发生的动作或状态。
例如I will/shall graduate next year.2. 一般将来时有时可以表示一种倾向或习惯性动作。
如:Crops will die without water. You won’t succeed without their support.3. 几种替代形式:(1) be going to+动词原形结构的用法这种结构表示主体现在的意图,即打算在最近或将来要做某事。
例如:What are you going to do next Sunday? 下星期天你打算干什么?此外, 这种结构也可表示说话人根据已有的迹象认为很可能即将发生某事。
这时主语既可指人也可指物,此结构往往表示客观事态的发展,而不是表示主观的意图。
(完整版)英语时态总结(完整)

英语共有十六个时态、四个体.(注:四个体为——一般、进行、完成、完成进行。
)(1)一般现在时1. 概念:经常、反复发生的动作或行为及现在的某种状况。
2. 基本形式(以do为例):第三人称单数:does(主语为非第三人称单数);肯定句:主语+动词原形+其他;He works for us.否定句:主语+don‘t/doesn’t+动词原形+其他;He doesn't work for us.一般疑问句:Do/Does+主语+动词原形+其他。
肯定回答:Yes,(+主语+do/does).否定回答:No,(+主语+don’t/doesn't.)特殊疑问句:疑问词+一般疑问句语Does he work for us?Yes, he does。
No, he doesn’tWhat does he do for us?He works for us。
(2)一般过去时1。
概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。
be动词+行为动词的过去式否定句式:在行为动词前加didn‘t,同时还原行为动词,或was/were+not;was或were放于句首;用助动词do的过去式did提问,同时还原行为动词例如: Did he work for us?He didn’t work for us.He worked for us。
(3)一般将来时1。
概念:表示将要发生的动作或存在的状态及打算、计划或准备做某事。
am/are/is+going to+do 或will/shall+doam/is/are/about to + doam/is/are to + do;一般将来时的表达方法be going to +动词原形be +不定式,be to+动词原形,be about to +动词原形be able to +不定式be about to+动词原形will + 动词原形;例如:He is going to work for us。
小学英语必须掌握的几种时态

小学英语必须掌握的几种时态五座窑小学小学英语必须掌握的几种时态1、一般现在时2、现在进行时3、一般将来时的用法4、一般过去时5、现在完成时一般现在时标志词:每一)原形12、以s,x does345功能1.2.3.构成1.be动词:主语+be(am,is,are)+其它。
如:Iamaboy.我是一个男孩。
2.行为动词:主语+行为动词(+其它)。
如:WestudyEnglish.我们学习英语。
句型肯定句:A.be动词:主语+be+其它成分Heisaworker.B.行为动词:主语+动词(注意人称变化)+其它成分Welikethelittlecat.否定句:A.be动词:主语+be+not+其它成分Theyarenotstudents.B.行为动词:主语+助动词(do/does)+not+动词原形+其它成分Wedon’tlikethelittlecat.一般疑问句:A.be动词:Am/Is/Are+主语+其它成分Areyouateacher?Yes,Iam./No,Iamnot.Aretheystudentsofyourschool.Yestheyare/Notheyaren,t.B.行为动词:助动词(Do/Does)+主语+动词原形+其它成分Doyoulikeit?Yes,Ido./No.Idon’t.Doeshe(she)likeit?Yes,he(she)does./No,he(she)doesn’t.特殊疑问句:疑问词+一般疑问句A.be动词:Howmanystudentsarethereinyourschool?1.动词Be are。
2.动词注意事项1.do,does标志词:现在进行时基本结构:beis+动词Whatareyoudoing?动词的-ing形式的变化规律:1.?直接加-ingwatch—watching????clean—cleaning2.?以-y结尾的动词,直接加-ingstudy—studying??????play—playing3.?以不发音的-e结尾的动词,先去-e再加-ingmake—making??????come—coming4.?末尾只有一个元音字母和一个辅音字母的重读闭音节动词,双写末尾字母,再加-ingcut—cutting?????一般将来时的用法:表示将来某一时刻的动作或状态,或将来某一段时间内经常的动作或状态。
英语中的八大时态

英语中的八大时态英语时态8种基本时态有:一般现在时、一般现过去时、现在进行时、过去进行时、现在完成时、过去完成时、—般将来时、过去将来时。
一般现在时:一般现在时,是一种英语语法形式。
表示通常性、规律性、习惯性、真理性(即事实)的动作或状态,或者动作有时间规律发生的事件的一种时间状态。
在英语语法中,“时“指动作发生的时间,”态“指动作的样子和状态。
一般现过去时:一般过去将来时表示从过去的某一时间来看将来要发生的动作或呈现的状态。
在英语时态中,“时“指动作发生的时间,”态“指动作的样子和状态。
一般过去将来时的出发点是过去,即从过去某一时刻看以后要发生的动作或状态。
现在进行时:现在进行时,专业术语,是英语的一种时态,表示现在进行的动作或存在的状态。
在英语时态中,“时“指动作发生的时间,”态“指动作的样子和状态。
现在进行时表示动作发生的时间是“现在”,动作目前的状态是“正在进行中”。
过去进行时:过去进行时,表示过去在某一时间段或某一段时间内正在发生或进行的动作或状态。
在英语时态中,“时“指动作发生的时间,”态“指动作的样子和状态。
现在完成时:由“have/has+过去分词”构成,主要有两个含义:表示动作发生在过去,但与现在的情况有联系,有时无时间状语,有时和一些表示不确定的过去时间状语连用,如:many times,just,yet,ever,never,already,before,so far,by now等连用。
过去完成时:过去完成时:表示过去某一时间或动作以前已经发生或完成了的动作,对过去的某一点造成的某种影响或是结果,用来指在另一个过去行动之前就已经完成了的事件。
在英语时态中,“时“指动作发生的时间,”态“指动作的样子和状态。
它表示动作发生的时间是“过去的过去”,侧重事情的结果。
—般将来时:一般将来时表示将来某一时段的动作或状态,或将来某一段时间内经常的动作或状态。
在英语时态中,“时“指动作发生的时间,”态“指动作的样子和状态。
小学英语五大时态

小学英语五大时态一、一般现在时:1.概念:经常、反复发生的动作或行为及现在的某种状况。
2.时间状语:always, usually, often, sometimes, every week on sunday,3.基本结构:主语+动词原形eg:I make a snowman.主语第三人称+does She goes to school on foot. 4.否定形式:主语+ don't +动词原形I don't like washing.主语第三人称+ doesn't +动词原形She doesn't like me.5.一般疑问句:Do +主语+动词原形Do you like some breadDoes+主语第三人称+动词原形Does she go to the park二、一般过去时:1.概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。
2.时间状语:ago, yesterday, just now, at the age of 5, one day, long long ago3.基本结构:be动词+doing eg: I finished my homework yesterday.4.否定形式:didn't +动词原型I did not finish my homework yesterday.5.一般疑问句:Did +动词原型Did you finish your homework yesterday三、现在进行时:1.概念:表示现阶段或说话时正在进行的动作及行为。
2.时间状语:now, at this time, these days, etc.3.基本结构:am/is/are+doing eg: He is doing well in his lessons.4.否定形式:am/is/are+not+doing. I am not playing .5.一般疑问句:把be动词放于句首。
8种基本英语时态

8种基本英语时态一、一般现在时 (Simple Present Tense)一般现在时用于描述客观事实、习惯性动作、科学真理等情况。
它的结构是:主语 + 动词原形(第三人称单数加-s)。
例句1:Dogs bark.狗会叫。
例句2:I brush my teeth twice a day.我每天刷牙两次。
例句3:The sun rises in the east.太阳从东方升起。
二、一般过去时 (Simple Past Tense)一般过去时用于表示过去某个时间发生的动作或状态。
它的结构是:主语 + 动词过去式。
例句1:She played basketball yesterday.她昨天打篮球。
例句2:They visited their grandparents last weekend.他们上个周末去看望了他们的祖父母。
例句3:I lived in London for two years.我在伦敦住了两年。
三、一般将来时 (Simple Future Tense)一般将来时用于表示将来发生的动作或状态。
它的结构是:主语+ will + 动词原形。
例句1:I will go to the park tomorrow.我明天将去公园。
例句2:She will study abroad next year.她明年将出国留学。
例句3:They will have a party on Friday.他们将在星期五举办派对。
四、现在进行时 (Present Continuous Tense)现在进行时用于表示现在正在进行的动作。
它的结构是:主语+ am/is/are + 动词-ing。
例句1:He is reading a book now.他现在正在看书。
例句2:We are having dinner at the moment.我们此刻正在吃晚餐。
例句3:They are playing football in the park.他们正在公园踢足球。
英语的时态及基本结构

英语的时态及基本结构英语的时态是描述动作或状态在时间上的发生、进行或完成的方式。
以下是常见的英语时态及其基本结构:一、一般现在时 (Present Simple)1.结构:主语+ 动词原形(第三人称单数动词形式)2.用途:描述经常性、习惯性或一般事实的行为;表达现在状态、特征或性格。
3.例子:I work hard. (我努力工作。
)二、现在进行时 (Present Continuous)1.结构:主语+ be 动词(am/is/are)+ 动词-ing2.用途:描述正在发生的动作或情况。
3.例子:I am studying English. (我正在学习英语。
)三、一般过去时 (Past Simple)1.结构:主语+ 动词过去式2.用途:描述过去发生的动作或状态。
3.例子:I went to the park yesterday. (我昨天去了公园。
)四、过去进行时 (Past Continuous)1.结构:主语+ be 动词的过去式(was/were)+ 动词-ing2.用途:描述过去某个时间正在进行的动作。
3.例子:I was reading a book at that time. (那时候我正在读书。
)五、一般将来时 (Future Simple)1.结构:主语+ will + 动词原形2.用途:描述将来要发生的动作或状态。
3.例子:I will go to the concert tomorrow. (我明天要去听音乐会。
)六、现在完成时 (Present Perfect)1.结构:主语+ have/has + 过去分词2.用途:描述过去发生的动作对现在造成的影响或结果;或描述从过去某一时间开始一直持续到现在的动作或状态。
3.例子:I have finished my homework. (我已经完成了我的家庭作业。
)七、过去完成时 (Past Perfect)1.结构:主语+ had + 过去分词2.用途:描述过去某一时间之前已经完成的动作或状态。
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英文最基本的五个时态英文最常用的时态有五个:一般现在时;现在进行时;一般过去时;一般将来时和现在完成时.一、一般现在时:用动词原型表示,但单数第三人称后要加-s,在词尾加-s时要注意:1.一般情况:加-s 例:reads,writes,says2.以s,x,ch,sh收尾的词加-es例:teaches,washes,guesses3.以辅音字母+y结尾的词变y为i再加-es例:try—tries,carry—carries.这个时态的疑问句一般以句首加助动词do,does构成.句中动词要用原型动词be提前:do you know it?are you students?does she have a pen?1.一般现在时表示经常性或习惯性的动作:we always care for each other and help each other.they cycle to work every day.2.现在的特征或状态:he loves sports.do you sing?a little.i major in english.3.普遍真理:light travels faster than sound.two and four makes six.the moon moves round the earth.有些表示状态和感觉的动词常常可用于一般现在时:be,love,like,hate,want,hope,need,prefer,wish,know,understand,remember,believe,recognize,guess,su ppose,mean,belong,think,feel,envy,doubt,remain,consist,contain,seem,look,see,fit,suit,owe,own,hear, find,suggest,propose,allow,show(说明),prove,mind,have,sound,taste,matter,require,possess,desire等等.i feel a sharp pain in my chest/*[tʃest]胸部*/.the soup/*soup [su:p]汤*/ contains too much salt/*salt [sɔ:lt]盐*/.you see what i mean?the coat fits you very well.how do you find the book?有些表示动作的动词间或可用于这一时态,表示现刻的动作,由于动作持续时间机短,用于进行时不自然:i send you my best wishes.i salute your courage.now i extend my heartfelt thanks to you.在口语中这个时态用来表示一个按规定、计划或安排发生的情况(这是都有一个表示未来时间的状语):when do the train leave(stop at jinan)?the plane take off at 11 am.tomorrow is saturday.is there a firm on tonight?但这只限少数动词,如begin,come,go,leave,sail,start,arrive,return,dine,end,stop,depart,open,close,be 等.另外,在时间或条件从句中,将来动作或状态多用这一时态表示:tell her about that when she come.turn off the light before you leave.we‘ll start as soon as you are ready.在口语中,这个时态间或可以用来表示一个已经发生的动作(这个动作发生的时间在说话人脑中处于很不重要的地位):they say xiao wu is back.is that true?xiao yu tells me you‘re going abroad.oh,i forget where he lives.yes,you answer quite well.此外一般现在时还多用于报刊、电影、电视解说等其他几种情况.二、现在进行时现在进行时用助动词be的人称形式加现在分词构成,它的肯定、否定、疑问形式如下:i am working.i am not working.am i working?现在进行时主要表示现在或现在这一阶段正在进行的动作.where are they having the basket-ball match?they are putting up the scaffolding.he‘s showing a foreign guest round the city.在不少情况下,表示正在进行的动作的汉语句子,并没有“正在”这样的字,在译为英语时却必须用进行时态:how are you getting on with the work?the work is going fairly smoothly.you are making rapid progress.it is blowing hard.who are you waiting for?whenever i see her,she is working in the garden.我每次看到她时,她总是在花园里干活.在一般现在时所列的表示状态和感觉的动词,一般不能用于进行时态,因为他们不能表示正在进行的动作.但如果词义转变,能表示一个正在进行的动作,就能够用于进行时态,试比较下面的句子: do you see anyone over there?你看到那里有什么人吗?are you seeing someone off?你在给谁送行吗?i hear someone singing.我听见有人唱歌.they are hearing an english talk?他们在听一个英语报告.what do you think of it?你觉得这怎么样?what are you thinking about?你在想什么?另外,表示无法持续动作的动词,一般不宜用于进行时态,但有些可以用于这个时态表示重复、即将等:he is jumping up and down.她一上一下地跳着.the train is arriving.火车就要进站了.the old man is dying.老头病危了.现在进行时有时可用来表示一个在最近按计划或安安排要进行的动作(这是多有一个表示未来时间的状语):we are leaving on friday.are you going anywhere tomorrow?a foreign guest is giving a lecture in english this afternoon.xiao hong!coming.who is interpreting for you?we are having a holiday next monday.但这仅限于少量动词,如go,come,leave,start,arrive,lunch,return,dine,work,sleep,stay,play,do,have,wear等.另外,“be going+不定式”这个结构经常用来表示即将发生的事或打算(准备)做的事:i am afraid it is going to rain.it is going to be rather cold tomorrow.she is not going to speak at the meeting.在这个结构中过去有许多人不赞成用go和come这两个动词,感到很别扭,主张不说are you going to go anywhere tomorrow?而说are you going anywhere tomorrow?不说is she going to come?而说is she coming?但现在在这种结构中用两个动词的人越来越多,这种用法基本上被大家接受了.此外,在时间和条件状语从句中,间或也可用现在进行时表示将来的情况或一般情况:do not mention this when you are talking with him.remember that when you are taking a rest,some else is always working.if she is still sleeping,do not wake her up.现在进行时有时用来代替一般现在时,表示一个经常性动作或状态,这是或是为了表示一种感情(a)如赞叹、厌烦等,或是为了强调情况的暂时性(b).a. how are you feeling today?(比how do you feel today?更显亲切)xiao hua is doing fine work at school.(比xiao hua does fine work at school.更富赞美)he is always thinking of his work.表赞许he is constantly leaving his thing about.她老是乱扔东西.(表不满)he is always boasting.他老爱说大话.(表厌烦)b.he is sleeping in the next room now.他现在现在是在隔壁房间睡了(不再原来房间睡了).the professor is typing his own letters while his secretary is ill.where is he working?他现在在那里工作?(可能刚换工作)for this week we are starting work at 7:30.he is walking to work because his bicycle is being repaired.be间或可用于进行时态,表示一时的表现:you are not being modest.he is being silly.she is being friendly.xiao hong is being a good girl today.do not talk rot.i am being serious.注: 在there和here引起的句子中,常可用一般现在时代替现在进行时:here comes the bus.(=the bus is coming.)there goes the bell. (=the bell is ringing.)在某些情况下两种情况都可以用,没有多少差别:i wonder (am wondering) how i should answer then.does your leg hurt? (is your leg hurting?)it itches (is itching) terribly.my back aches (is aching).i write (am writing ) to inform you.未完待续...(发帖时间:2004-01-06 19:51:16)---3dnow【外语学习成员】三、一般将来时一般将来时由助动词shall或will加动词原型构成,shall用于第一人称,will用于第二、三人称.这个时态的肯定、否定及疑问机构可表示如下:i shall go.i shall not go.shall i go?除英国以外的说英语的国家,在陈述句中,即使在第一人称一般也用will,在英国也有这种趋势,在口语中常紧缩为i’ll.一般将来时表示将要发生的动作和情况:i will (shall) arrive tomorrow.will you be busy tonight?the agreement will come into force next spring.we won’t(shan’t) be free tonight.有时表示将来的时间状语,有时没有时间状语,这时要从意思上判断是否指未来的动作或情况:i will think it over.who will take the chair?will she come?they won’t object it.在以i 或 we 作主语的问句中,一般用shall,这时或是征求对方的意见(a),或是询问一个情况(b): a. shall i make a fair copy of it?which book shall i read first?where shall we meet?b. shall we have any classes tomorrow?when shall we have the rehearsal?shall i be able to find them there?在这类问句中,近年来也有不少人用will,特别是美国.what will we do?how will get there?which will i take?注意在时间或条件状语从句中,一般不能用将来时态,而用现在时态代替:i’ll let you have the book when i’m through.they’ll fight till they win complete victory.i’ll be round to see you if i have time tomorrow.注:在两种情况下条件从句可以用一般将来时:1.表示愿望:if they won’t cooperate, our plan will fall flat.2.主句的谓语表时现在的情况:if he won’t arrive this morning, why should we wait here.表示将要发生的动作或情况,除了一般将来时外,还有一些其他结构和时态:1. be going +不定式(表打算、准备作的事或即将发生或肯定要发生的事):we ‘re going to put up a building here.how are you going to spend your holiday?who is going to speak first?2. be +不定式(表示按计划安排要发生的事或用来征求对方的意见):when is the factory to go into production?the line is (going) to be opened to traffic next week.am i to (=shall i ) go on with the work?3.一般现在时(限于某些动词,表示按计划或时刻要发生的事):school finishes on january 18th.we get off at the next stop.when does the winter vacation begin?4.现在进行时(限于某些动词,表示按计划安排要发生的事):we are having an english evening tonight.they are playing some folk music next.i am talking the children to the zoo (on sunday ).在单纯表示将来情况,特别是谈一连串的事情或在带时间或条件状语从句的句子中,谓语多用将来时:next term i will try to do better. i’ll speak more english and do more reading-aloud.4楼he’ll come to see you when he has time.he’ll tell you if you ask him.在表示打算或准备时,如不提时间、条件等,多用be going to这个结构,用一般将来时时很少的,特别是在口语中:he is going to buy a dictionary.(很少说he will buy a dictionary.)在谈即将发生的情况时,用be going to 这个结构也多一些.在表示按计划安排要做得事时,用be t o 的时候也不少.另外还有将来进行时等时态也可表示将来的动作.注:be about to 可表示即将作某事we are about to leave.he is about to retire.一般将来时有时还可用来表示一种倾向或习惯性动作:a drowning man will catch at a straw.crops will die without water.oil will float on water.注:这一时态有时用来表示揣测(a)或容量(b):a. that man in the middle will be the visiting minister.b. the hall will seat 500people.四、一般过去时一般过去时由动词的过去式表示,动词be有was, were两个过去式,was用于第一、三人称单数,w ere用于其他情况.在构成否定及疑问句时,一般都借助助动词did, 动词be有其独特的疑问及否定形式(基本上和一般现在时一致).这个时态的三种结构可表示如下:一般动词:i worked there.i did not work there.did you work there?动词be:i was there.i was not there.was i there?一般过去时主要表示过去某时发生的动作或情况(包括习惯性动作)who put forward the suggestion?when did she leave?she often came to help us.有些情况,发生的时间不很清楚,但实际上是过去发生的,应当用过去时态:i was glad to get your letter.what was the final score?how did you like their performance?*在谈到已死去人的情况多用过去时:lao she was a great writer.my grandmother was kind to us.有时两种时态都可以用:brahms was/is one of the greatest representative of german classicalism.注:在口语中一般过去时有时可用来代替一般现在时,使语气变得婉转一些,例如在下面句子中用一般现在时或一般过去时都可以,但用过去时显得客气一些(带有更多商量的口吻):do/did you want to see me?i wonder/wondered if you could spare a few minutes.i want/wanted to ask if i can/could borrow your bike.未完待续..让大家久等了.第一次自己敲键盘发帖子.好累呀.:(---3dnow【外语学习成员】五、现在完成时现在完成时由have的人称形式加过去分词构成.他的肯定、否定及疑问形式如下:i have read it.i have not read it.have you read it?现在完成时表示现刻以前发生的动作或情况,可以是:1.到现在为止的这一时期中发生的情况(可能时多次动作的总和,也可表示状态和习惯性动作): we have opened up 200 mu of land this year.how many pages have you covered today?i haven’t seen him for many days.2. 对现状有影响的某一已发生的动作:the delegation has already left.i have seen the film many times.the city has taken on a new look.注: 这个时态有时还可以表示过去曾发生过一次或多次的情况,也可以说是一种经历:all our children have had measles.man’s hairs have grown white in a single might.he says that he has seen a meteor at some time.这个时态的基本特点是它和现在有密切的联系,或是讲迄今为止这一段时间的情况,或是讲一个影响现状的动作,这样它不是从时间上就是从后果上和现在联系起来.根据这个特点我们可以判断什么时候用一般过去时,什么时候用现在完成时:1.当有一个表示过去某时的状语(包括when)时,不能用现在完成时:i saw her a minute ago.just now xiao lin came to see you.when did you get to know it?2.当有一个表示到现在为止这段时间的状语时,多用现在完成时:up till now we have planted over 24,000 fruit trees.we haven’t had any physical training classes this week.he has learned a good deal since he came here.3.在用already, yet, just, as yet, ever, never这类副词作状语时,常可用现在完成时:this is the second game. they ’ve already won a game.have you got the plan ready yet? –no, not yet.i’ve just received a money order.4.在单独谈一个过去的动作,不涉及它对现在的影响时,通常用一般过去时,如果谈一件已经发生的事,不考虑它是什么时候发生的,而主要考虑对现在的影响,多用现在完成时:did you get up very early?has he got up?what did you have for lunch?have you had lunch?i got the news from xiao yu.i’ve got no news from him.注: 有since引起的状语时,主要谓语通常用完成时态:we met in 1972,and have been good friends ever since (then).it has rained a great deal since you left.we haven’t seen each other again since them (since we parted in 1952). 但在表示时间长度时可用一般现在时.l 在使用一个表示状态的动词(如be, seem等)作谓语时,间或也可用现在时态:it’s ok since i fixed it.it seems a long time since i was here.i’m getting interested in china since you came here. 间或用过去时,特别时在口语中.i lost ten pounds since i started swimming.在since引起的状语从句中,通常用一般过去时.但间或可用现在完成时:i haven’t seen him since i have been back.since i have known her, she has been fond of sports.有时同样一句汉语,由于使用场合不用,译成英语时可能需要不同时态:has xiao yang come?did xiao yang come?how many people have gone to the factory?how many people went to the factory?we haven’t invited him.we didn’t invite him.有时同样一个动作,也随着说话的意图不同而用不同时态表示:has he gone to town? how did he go there? 后一句谈动作本身,与现在无联系.have you had your lunch? where did you have it? 你吃中午饭了吗?在那吃的?has she left? why did she leave so early?某些动词的现在完成时刻表示一直持续到现在的状态:how have you been (recently)?the conference has lasted five days.we’ve known each other since we were children.特别是动词be,是常常这样用的:he’s been back for three days. (不能用has come back)she has been a teacher for ten years. (不能说has become)he has been in college for a year. (不能说has entered)由于come, become, enter和get up 等动词都只代表一个短暂的动作,不能代表一个延续的状态,这是需要用be来表示延续的状态:另外有少数动词(主要是work, study, teach, live等)可用于现在完成时表示一直持续到现在的一个动作:how long have you worked here?she has taught english for many years.we’ve lived here for quite a few years.但大多数动词不宜这样用,而需用现在完成进行时.注:have been (to)长可用来表示“到过某地”或“刚去做过某事”have you ever been to xi’an?xiao liu has just been here.we’ve been here(there)many times.l 现在完成时还可用在表示时间或条件的状语从句中,表示将来某时业已完成的动作:i’ll go and see the exhibition as soon as i have got the recorder fixed.we’ll start at five o’clock if it has stopped raining by theni will gibe my opinion when i have read the book through.这利用“现在完成时”时表示这动作将在另一动作之前完成.如果两个动词同时发生,或几乎同时发生,(也就是说一个动作紧接着另一个动作),一般就不用这个时态:i’ll let you know as soon as i hear from her.she’ll write you when she gets there.在这样的情况下(特别是当我们用的是get, arrive, see, hear, leave, return 等代表迅即完成的动作的动词时),多用一般现在时.有时两种时态都可以用:we’ll leave as soon as it stops(has stopped) raining.i’ll tell him after you leave (have left).注:have got 形式上时现在完成时,却和have时同一个意思:she has got (=has) a slight temperature.have you got (=do you have) any sisters?另外,现在有一种倾向,特别是在美国,在随便谈话时,常用一般过去时代替现在完成时:i saw it already (=i have seen it already).did you return the records yet (=have you returned the records yet)?i just come back (=i’ve just come back).。