Is he Grace's brother? (O)
He is Grace's brother.
Is he Grace's brother? (X)
He is not Grace's brother.
(be) (pron-subj) (Grace) ('s/') brother (?).
Is he Grace's brother?
Is it Ann's pencil? (O)
It is Ann's pencil.
Is it Ann's pencil? (X)
It is not Ann's pencil.
(be) (pron-subj) (Tony) ('s/') pencil (?).
Is it Tony's pencil?
Are they Jill's apples? (O)
They are Jill's apples.
Are they Jill's apples? (X)
They are not Jill's apples.
(be) (pron-subj) (Jill) ('s/') apples (?).
Are they Jill's apples?
Is it the cat's mouse? (O)
It is the cat's mouse.
Is it Anna's mouse? (X)
It is not Anna's mouse.
(be) (pron-subj) (the cat) ('s/') (n) (?).
Is it the cat's mouse?
Is it the dog's food? (O)
It is the dog's food.
Is it the dog's food? (X)
It is not the dog's food.
(be) (pron-subj) (the dog) ('s/') (n) (?).
Is it the dog's food?
Is it May's book? (O)
It is May's book.
