Our town is smaller than your city.
The book is more interesting than the film
This palace is more beautiful than that castle
This bus is more comfortable than that car
History is easier than Maths
Stpetersburg is bigger than Pavlovsk
Emma's homework is more difficult than Tom's dinner.
Структура легкая. Если в прилагательном три или больше трех слогов, то не изменяя прилагательное ставим more+прил+than. Например, interesting, beautiful. Если меньше трех, изменяем,добавляя er. Easy-easier
Small-smaller
Big-bigger
Nice-nicer