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：always, usually, often, 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：①am/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。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：①was/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放于句首；②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动词放于句首。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放于句首。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 +d one.一般疑问句：have或has。过去完成时概念：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”。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。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：①was/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：①be放于句首；②will/shall提到句首。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；②would/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。
