英语中的八大时态用法是什么?

英语中的八大时态用法是什么?
英语中的八大时态用法是什么?

英语中的八大时态用法是什么?
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 (day,year,month…),once a week,on Sundays,3.基本结构：动词 原形 （如主语为第三人称单数,动词上要加（e）S） 4.否定形式：am/is/are+not;此时态的谓语动词若为行为动词,则在其前加don't,如主语为第三人称单数,则用doesn't,同时还原行为动词.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,还原行为动词.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,the day before yesterday,last week(year,night,month…),in 1989,just now,at the age of 5,one day,long long ago,once upon a time,etc.3.基本结构：be动词；行为动词 4.否定形式：was/were+not;在行为动词前加didn't,同时还原行为动词.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,同时还原行为动词.6.例句：She often came to help us in those days.I didn't know you were so busy.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 4.否定形式：am/is/are+not+doing.5.一般疑问句：把be动词放于句首.6.例句：How are you feeling today?He is doing well in his lessons.四、 过去进行时：1.概念：表示过去某段时间或某一时刻正在发生或进行的行为或动作.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.基本结构：was/were+doing 4.否定形式：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 working 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,或从过去已经开始,持续到现在的动作或状态.2.时间状语：recently,lately,since…for…,in the past few years,etc.3.基本结构：have/has + done 4.否定形式：have/has + not +d one.5.一般疑问句：have或has.6.例句：I've written an article.It has been raining these days.六、 过去完成时：1.概念：以过去某个时间为标准,在此以前发生的动作或行为,或在过去某动作之前完成的行为,即“过去的过去”.2.时间状语：before,by the end of last year(term,month…),etc.3.基本结构：had + done.4.否定形式：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或存在的状态及打算、计划或准备做某事.2.时间状语：tomorrow,next day(week,month,year…),soon,in a few minutes,by…,the day after tomorrow,etc.3.基本结构：am/is/are/going to + do；will/shall + do.4.否定形式：was/were + not; 在行为动词前加didn't,同时还原行为动词.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 competition with us in studies.It is going to rain.八、 过去将来时：1.概念：立足于过去某一时刻,从过去看将来,常用于宾语从句中.2.时间状语：the next day(morning,year…),the following month(week…),etc.3.基本结构：was/were/going to + do；would/should + do.4.否定形式：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 next day