1. My house is bigger than your house. 
→Your house is smaller than mine
2. The black car is cheaper than the red car. 
→The red car more expensive tahn the black one.
3, This film is more interesting than that one. 
→That film is not so interesting as this one
4. My kitchen is smaller than yours. 
→ Your kitchen bigger than mine.
5, My grandmother is older than every one in my family.
→ My grandmother is the oldest person in my family.
6. No one in my class is as tall as Tam. 
→ Tam is the the tallest student in my class.
7. I can’t cook as well as my mother. 
→ My mother can cook better than I.
8. He does not play tennis as well as Jack. 
→ Jack can play tennis better than him
9, I did not spend as much money as you. 
→ You spent more money than I.
10, I don’t think this book is expensive as it is. 

→ This book is not as cheap as I think.