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.

Moscow is very old city,
but it is so over Novgorod

My dress is very fashionable
not as fashionable as my costume

Mercedes is the fastest car
Yes of course , it is a fast car But BMW is faster

I don't like spring, because streets are very dirty
my opinion in a utymn they are dirtier