1、时态 概念 时间状语 基本结构： 否定结构 疑问结构一般现在时 经常、反复发生的动作或行为及现在的某种状况。always,usually,often, sometimes, every week (day, year, month), once a week, on Sundays, etc.be 动词;行为动词am/is/are+not;此时态的谓语动词若为行为动词，则在其前加 dont,如主语为第三人称单数，则用doesnt，同时还原行为动词。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。一般过去时 过去某个时间里发生的动作或状态;过
2、去习惯性、经常性的动作、行为ago,yesterday, the day before yesterday, in 1989,just now,last week(year, night, month), at the age of 5, one day, long long ago, once upon a time, etc.be 动词;行为动词否定形式：was/were+not;在行为动词前加 didnt，同时还原行为动词。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。现在进行时 表示现阶段或说话时正在进行的动作及行为now, atthis ti
3、me, these days, etc 基本结构：am/is/are+doingam/is/are+not+doing. 把 be 动词放于句首过去进行时 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at thistime 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。was/were+doing was/were+ not + doing 把 was 或 were 放于句首现在完成时： 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。recently,lately, sincefor,i
4、n the past few years, etc.have/has+ done have/has+ not +done. have 或 has 放于句首过去完成时 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”。before,by the end of last year(term, month),etc.had +done had + not+ done had 放于句首一般将来时 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tomorrow,next day(week, month, year),soon, in a few mi
5、nutes, by,the day aftertomorrow, etc. am/is/are+going to + do; will/shall + do.was/were + not; 在行为动词前加 didnt，同时还原行为动词。be 放于句首;will/shall 提到句首。过去将来时 立足于过去某一时刻，从过去看将来，常用于宾语从句中the nextday(morning, year),the following month(week),etcwas/were/going to + do;would/should + do.was/were/not + going to + do;w
6、ould/should + not + do.was 或 were 放于句首;would/should 提到句首。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，可用別的表达方式：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 haspassed since + 一般过去时”的句型中。请看：A. He joined theLeague two years ago.B. He has been inthe League for two years.C. It is two yearssince he joined the League.D. Two years haspassed since he joined the League.
