Общий - Does he usually sits under the tree in the garden?
Do they usually sit under the tree in the garden?
Альтернативный - Does he usually sits or lays under the tree in the garden?
Do they or we sit under the tree in the garden?
Разделительный (с хвостиком) - He usually sits under the tree in the garden, doesn't he?
They usually sit under the tree in the garden, don't they?
Специальный (с вопросительным словом кто, что, как, когда)
Who sits under the tree in the garden?
Where he usually sits under the tree?
How often he usually sits under the tree in the garden?