一般过去时ago, yesterday, the day before yesterday, last week/year/night/month..., in 1989, just now, at the age of five, one day, ago, long ago, once upon a time, then, on that day.现在完成时recently, recent years, these days/years, lately, since, for + 时段, in the past few years, ever since, in the last five months, up to now, since then, so far, ever, never, yet, lately, once, twice, three/four times..., already, before, just.。