He ..............(go) to Ba Na Hills last summer.
went
He (walk).................to school when he (see)............an accident yesterday.
was walking / saw
Mai and Nam (play)..............chess now.
are playing
Yesterday, when I (phone)...........my friends, they(play)..........football.
phoned / were playing
We often (go)...........to the cinema.
go
They (have)...........dinner at this time yesterday.
were having
you (go).............shopping last week?
Did you go ....?
She (not visit)..............her grandparents last weekend.
didn't visit
My family (not buy)..............a new house yet.
hasn't bought