一、一般现在时:
概念: 经常、反复发生的动作或行为及现在的某种状况。
时间状语: often, usually, always, sometimes, every week(day, year, month... ), once a week, on Sundays, etc.
基本结构: ①be动词; ②行为动词
否定形式: ① am /is /are +not; ②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。
一般疑问句: ①把be动词放于句首; ②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。
二、一般过去时:
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。
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.
基本结构: ①be动词; ②行为动词
否定形式: ① was/were +not; ②在行为动词前加didn't, 同时还原行为动词。
一般疑问句: ①was或were放在句首; ②用助动词do的过去式did提问, 同时还原行为动词。
三、现在进行时:
概念: 表示现阶段或说话时正在进行的动作及行为。
时间状语: now, at this time, these days, etc.
基本结构: am/is/are +doing
否定形式: am/is/are +not+doing
一般疑问句: 把be动词放在句首
四、过去进行时:
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。
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。
基本结构: was/were +doing
否定形式: was/were +not+doing
一般疑问句: 把was或were放在句首
五、现在完成时:
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。
时间状语: recently, lately, since..., for..., in the past few years, etc.
基本结构: have/has +done
否定形式: have/has +not+done
一般疑问句: have/has放于句首
六、过去完成时:
概念: 以过去某一时间为标准, 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。
时间状语: before, by the end of last year(term, month... ), etc.
基本结构: had +done
否定形式: had +not+done
一般疑问句: had放于句首
七、一般将来时:
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。
时间状语: tomorrow, next day(week, month, year.... ), soon, in a few minutes, by..., the day after tomorrow, etc.
基本结构: ①am/is/are/going to +do; ②will/shall+do
否定形式: ①am/is/are +not+going to +do; ② will/shall+not+do
一般疑问句: ①be放于句首; ② will/shall提到句首
八、过去将来时:
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。
时间状语: the next day(morning, year... ), the following month(week... ), etc.
基本结构: ①was/were/going to +do; ② would/should +do
否定形式: ①was/were/not+going to +do; ②would/should +not+do
一般疑问句: ①was或were放于句首; ②would/should提到句首
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