一般现在时　　every …, sometimes,　at …, on Sunday,

　　一般过去时　　yesterday, last week, an hour ago, the other day, in 1982, just now

　　一般将来时　　next…, tomorrow, in+时间,

　　现在完成时　　for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always, recently

　　过去完成时　　before, by, until, when, after, once, as soon as

　　过去进行时　　this morning, the whole morning, all day, yesterday, from nine to ten last evening… when, while

　　将来进行时　　soon, tomorrow, this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening