(1) Mari and I never watches series. | (2) Mari and I always watch series. | (3) Mari and I watch series always.
(2)
(1) Do they have a nice friend? | (2) Do Mari and Ana are a nice friend? | (3) Does Mari and Ana have a nice friend?
(1)
(1) What do John like to eat? | (2) What do he like to eat? | (3) What does he like to eat?
(3)