1.Does your uncle like reading at home on weekends?
-- Yes,he does.
---- No,he doesn't.
2.Does Tom have a new backpack?
--- Yes,he does.
---- No,he doesn't.
3.Are there some birds in the tree?
--- Yes,there are.
---- No,there aren't.
4.Is the boy swimming at the pool?
--- Yes,he is.
---- No,he isn't.