1) - Moscow is very old city.
- Yes, it is, but Novgorod is older than Moscow.
2) - My dress is very fashionable.
- Not as fashionable as my suit.
3) - Mercedes is the fastest car.
- Yes, of course, it is a fast car, but BMW is faster.
4) - I don't like spring, because streets are very dirty.
- In my opinion, in autumn they are dirtier.