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1. Her new house is not as big as her old house. 
2. Peter is the tallest student in my class. 
3. The white dress is not as expensive as the black dress. 
4. According to me, Maths is not as easy as English. 
5. Mary is the most intelligent in my group. 
6. The Nile is the longest river in the world. 
7. No mountain in the world is higher than Mount Everest. 
8. She is the prettiest girl that I have ever met. 
9. The more he works, the more tired he feels. 
10. That computer doesn't work as well as this one. 
11. The bigger the apartment is, the higher the rent is. 
12. The sooner we set off, the sooner we will arrive.
13. The better the joke is, the louder the laughter is. 
14. The fatter she gets, the more tired she feels. 
15. The older he gets, the less he wants to travel.
16. The more difficult the games are, the more excited the children are.