1.А) We celebrate Easter yesterday.
Б) We celebrated Easter yesterday.

2.А)She always helps her mother on Saturdays.
Б) She always help her mother on Saturdays.

3.А)The children did not go to school last week.
Б)The children do not go to school last week.

4.А) They have a party next Sunday.
Б)They will have a party next Sunday.

5.А) My family usually travels by car in summer.
Б)My family usually travels by car next summer.​