Divide the following words into three groups, those which are used in Indefinite (Simple); Continuous (Progressive); Perfect(распределите лексические указатели по трем группам грамматических времен глагола) : Always, now, two weeks ago, ever, never, since, yet, often, already, usually, at present, recently, generally, in a week, from 5 till 6 o’clock tomorrow, all morning yesterday, last Monday, by Monday, in 1989, every day, yesterday, just, all the year round, lately, sometimes, in the future, last year, on the 8th of March 1998, the day after tomorrow, this winter, next week, as a rule, since summer, tomorrow, just now, seldom, all day long, rarely, a week ago, three days ago, throughout the year.

Indefinite: always, two weeks ago, often,  usually, generally, in a week, last Monday,  in 1989, every day, yesterday, sometimes, in the future,last year, on the 8th of March 1998, the day after tomorrow, next week, as a rule,  tomorrow, seldom,  rarely, a week ago, three days ago, throughout the year. Continuous: now,  at present,  from 5 till 6 o’clock tomorrow,  all morning yesterday,  all the year round, just now, all day long. Perfect: already, ever,  never,  since,  yet,  recently,  by Monday,  just, lately,  this winter, since summer.