11. This film is more interesting than that one.
=> That film is not as interesting as this one 
12. My kitchen is smaller than yours.
=> Your kitchen is bigger than mine 
13. My grandmother is older than every one in my family.
=> My grandmother is the oldest person  in my family.
14. No one in my class is as tall as Tam.
=> Tam is the tallest student  in my class
15. I can't cook as well as my mother.
=> My mother can cook better than me
16. He does not play tennis as well as Jack.
=> Jack can play tennis better than him
17. My house is bigger than your house.
→Your house is smaller than mine