Mary has just brought the tea.

Mary brought the tea a few minutes ago.

The bell has already rung.

The bell rang some minutes ago.

He has already gone to London.

He went to  London last week.

The boys have played football many times.

The boys played football yesterday.

Mother has read a magazine today.

Mother read a magazine last year

The teacher has just explained the new rule.

The teacher explained the new rule at the previous lesson.

Ann and Lili haven’t done the flat yet.

Ann and Lili did the flat on Friday.