一 般现在时标志词：every day, evry Sunday, often, always, usually, sometimes , on Sundays, on weekdays等等。一般过去时标志词：ago, yesterday, the day before yesterday, last week/year/night/month., in 1989, just now, at the age of , one day, ago, long ago, once upon a time,（从前，很久以前） then(那时), on that day（在那天）,一般将来时标志词：soon, tomorrow, the day after tomorrow（后天）， this evening/afternoon/year before long(不久以后）， next year/month/week/summer， in the future, some day(将来的某一天) ， in two
