... should / could Used to / ought to Used to / ought to Today That day Yesterday The day before/ the previous day Tomorrow The next day/ the following day Now Then, at once Ago Before Last week The previous ... march, in 199 9, in the winter, in the 20 th century in an hour, in a minute, in a week, in a moment in the beginning, in the end, in a day ON: on August 8 th , on Tuesday, on weekdays, on ... in a day ON: on August 8 th , on Tuesday, on weekdays, on Christmas day on Monday morning, on a fine sunny day AT: at 9 o’clock, at midnight, at noon, at dawn, at lunchtime at Christmas,...