This
(肯定句)This is my book.
(否定句)This is not my book.
(疑问句)Is this my book?
That
(肯定句)That is your pen.
(否定句)That is not your pen.
(疑问句)Is that your pen?
These
(肯定句)These are my friends.
(否定句)These are not my friends.
(疑问句)Are these my friends?
Those
(肯定句)Those are your cars.
(否定句)Those are not your cars.
(疑问句)Are those your cars?