compare the two things.сравните эти две вещи 
A mountain is (high) than a hill.
A "BMW" is (expensive) than  a Volga.
Nowadays life is (difficult) than it used to be.
A walking holiday is (healthy) than a holiday in a car.
Len's English is (bad) than Pat's. 

A mountain is higher than a hill.A "BMW" is more expensive than a Volga.Nowadays life is more difficult than it used to be.A walking holiday is healthier than a holiday in a car.Len's English is worse than Pat's.