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1、-英语中常见的八种根本时态一、一般现在时：1.概念：经常、反复发生的动作或行为及现在的*种状况。2.时间状语：always,usually,often,sometimes,every week(day,year,month),once a week,on Sundays,3.根本构造：动词原形如主语为第三人称单数，动词上要加eS4.否认形式：am/is/are+not;此时态的谓语动词假设为行为动词，则在其前加 dont,如主语为第三人称单数，则用 doesnt，同时复原行为动词。5.一般疑问句：把 be 动词放于句首；用助动词 do 提问，如主语为第三人称单数，则用 does，同时，复原行为
2、动词。6.例句：.It seldom snows here.He is always ready to help others.Action speaks louder than words.二、一般过去时：1.概念：过去*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,the day before yesterday,last week(year,night,month),in 1989,just now,at theage of 5,one day,long long ago,once upon a time,etc.3.根本构造：be
3、动词；行为动词4.否认形式：was/were+not;在行为动词前加 didnt，同时复原行为动词。5.一般疑问句：was 或 were 放于句首；用助动词 do 的过去式 did 提问，同时复原行为动词。6.例句：She often came to help us in those days.I didnt know you were so busy.三、现在进展时：1.概念：表示现阶段或说话时正在进展的动作及行为。2.时间状语：now,at this time,these days,etc.3.根本构造：am/is/are+doing.z.-4.否认形式：am/is/are+not+doi
4、ng.5.一般疑问句：把 be 动词放于句首。6.例句：How are you feeling todayHe is doing well in his lessons.四、过去进展时：1.概念：表示过去*段时间或*一时刻正在发生或进展的行为或动作。2.时间状语：at this time yesterday,at that time 或以 when 引导的谓语动词是一般过去时的时间状语等。3.根本构造：was/were+doing4.否认形式：was/were+not+doing.5.一般疑问句：把 was 或 were 放于句首。6.例句：At that time she was worki
5、ng in a PLA unit.When he came in,I was reading a newspaper.五、现在完成时：1.概念：过去发生或已经完成的动作对现在造成的影响或结果，或从过去已经开场，持续到现在的动作或状态。2.时间状语：recently,lately,sincefor,in the past few years,etc.3.根本构造：have/has+done4.否认形式：have/has+not+d one.5.一般疑问句：have 或 has。6.例句：Ive written an article.It has been raining these days.六
6、、过去完成时：1.概念：以过去*个时间为标准，在此以前发生的动作或行为，或在过去*动作之前完成的行为，即“过.z.-去的过去。2.时间状语：before,by the end of last year(term,month),etc.3.根本构造：had+done.4.否认形式：had+not+done.5.一般疑问句：had 放于句首。6.例句：As soon as we got to the station,the train had left.By the end of last month.We had reviewed four books七、一般将来时：1.概念：表示将要发生的动作
7、或存在的状态及打算、方案或准备做*事。2.时间状语：tomorrow,ne*t day(week,month,year),soon,in a few minutes,by,the day after tomorrow,etc.3.根本构造：am/is/are/going to+do；will/shall+do.4.否认形式：was/were+not;在行为动词前加 didnt，同时复原行为动词。5.一般疑问句：be 放于句首；will/shall 提到句首。6.例句：They are going to have a petition with us in studies.It is going
8、 to rain.八、过去将来时：1.概念：立足于过去*一时刻，从过去看将来，常用于宾语从句中。2.时间状语：the ne*t day(morning,year),the following month(week),etc.3.根本构造：was/were/going to+do；would/should+do.4.否认形式：was/were/not+going to+do;would/should+not+do.5.一般疑问句：was 或 were 放于句首；would/should 提到句首。6.例句：He said he would go to Beijing the ne*t day.z
9、.-I asked who was going there.几种常见时态的相互转换英语中的几种时态在一定情况下可以互相转换，以下是几种常见的转换形式：一、一般过去时与现在完成时的转换在现在完成时中，延续性动词能与表示一段时间的状语连用，瞬间动词却不能。但是，可用别的表达方式：瞬间动词用于“一段时间+ago的一般过去时的句型中；瞬间动词可改成与之相对应的延续性动词及短语，与一段时间连用；瞬间动词用于“It is+一段时间+since+一般过去时的句型中，表示“自从以来有时间的意思，主句一般用it is 来代替 It has been;瞬间动词用于“Some time has passed sin
10、ce+一般过去时的句型中。请看：A.He joined the League two years ago.B.He has been in the League for two years.C.It is two years since he joined the League.D.Two years has passed since he joined the League.二、一般现在时与现在进展时的转换在一般现在时中，at 加上名词表示“处于*种状态，如 at work在工作,at school上学、上课等。此短语可与进展时态转换。请看：Peter is at work,but Mike
11、 is at play.Peter is working,but Mike is playing.三、现在进展时与一般将来时的转换在现在进展时态中 go,e,leave,start,arrive 等动词常与表示将来的时间状语连用表示将要发生的动作。如：I am ing,Mum!意为“我就来，妈妈！请看：The train is leaving soon.The train will leave soon.四、“be going to+动词原形与“will(shall)+动词原形构造的转换“be going to+动词原形、表示打算、方案要做的事；将来时“will(shall)+动词原形构造在书面语中，当主语为 第一人称时，常用助动词 shall。在口语中，所有人称都可以用 will。请看：We are going to visit the Great Wall ne*t Sunday.We shall visit the Great Wall ne*t Sunday.z.