1- yesterday morning, yesterday afternoon, yesterday evening
2- this morning, this afternoon, this evening, this week, this month.
3- last night, last week, last weekend, last month, last year, last February
4- on Friday, on July 10th, on Saturday night
5- in August, in 1998, in June 1999
6- five minutes ago, two hours ago, two days ago, a week ago, three months ago
7- at three o'clock, at midday, at midnight
