Have you seen peter? yes, i him yesterday/ 1) see 2) sees 3) saw 4) will see

1. john often goes to the theatre on sundays.

2. they usually go to the park twice a week.

3. how often do you play baseball?

i was at school yesterday.

he walked there.

do you know him.

they have done homework.

1. were

2. know

3. knows