The dog is (fast) than the hedgehog, but (slow) than the horse. The dog is (fast). The hedgehog is (slow).
The dog is FASTER than the hedgehog, but SLOWER than the horse. The dog is THE FASTEST. The hedgehog is THE SLOWEST.
The book "Peter Pan" is (boring) than the book "Harry Potter".
The book "Peter Pan" is more boring than the book "Harry Potter".
Who is (famous) singer in your country?
Who is THE MOST FAMOUS singer in your country?