英语中一共有多少种时态?它们分别是什么??请各位恩师详细告诉我用法...答:2.时间状语:ago, yesterday, the day before yesterday, last week,last(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 的过去式 4.否定形式:was/were+not;在行为动词前加didn't,同时...