Раскройте скобки, употребив нужную форму глагола:
1)
— ... they .... (to paint) the garage yet?
— No, they .... . He .... still ..... (to paint) it.
— How long ... they ... .... (to paint) it?
— They ... .... .... (to paint) it since he returned from a business trip.
— When ... he .... (to return) from his business trip?
— He ... (to return) a week ago.
— What ... they ... (to paint) when he returned from the trip?
— They... .... (to paint) the walls in the garage.