She's not so tired as she was yesterday
Correct
Women drive more careful than men
Incorrect - more carefully
I have fewer free time nowadays
Incorrect - less free time
Driving is more boring than going by train
Correct
What's the quicker way to get across your city?
Incorrect - the quickest way
She's the unfriendliest person I've ever met
Incorrect - the most unfriendly
A skateboard is nearly as fast than a bike
Incorrect - as fast as
Oxford is about the same distance from Cambridge as London
Correct
Pizza isn't as nicer as pasta
Incorrect - as nice as