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: always, usually, often, sometimes, every week (day, year, month…), once a week, etc.
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.
三、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.
四、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.
五、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.