Using More, Less and Fewer

sentences and most in superlative ones.

Examples: 

I have many books at home. In fact, I have more books than my friends do. 

more + count nouns + than

I can't go to the supermarket because I don't have much time. I think you should go shopping today because you have more time than I do.

more + noncount nouns + than

When expressing the opposite of more, use less for noncount and fewer for count nouns.

Examples:

Albany doesn't attract many tourists. It attracts fewer tourists than New York City.

fewer + count nouns + than

John doesn't drink much coffee. He drinks less coffee than his friends do. 

less + noncount noun + than

So remember, even though more can be used with both count and noncount nouns, use fewer with count nouns and less with noncount nouns to express smaller quantities or amounts.