Comparisons
Compare like with like, and use the right comparing word.
Updated October 29, 2026
The rule
Use -er or more for two things and -est or most for three or more. Never double them: more taller is wrong.
Use fewer for things you can count (fewer apples) and less for amounts you can't (less water). Compare the same kinds of things: "Her score was higher than her brother's", not "than her brother".
Examples
This line has less people.This line has fewer people.Of the three puppies, this one is smaller.Of the three puppies, this one is smallest.
Quick test: Count them: if you could put a number in front, use fewer and number.
Try it: find the mistake
The mistake in each sentence is highlighted. Say the fix out loud, then open the answer.
My dog is more bigger than your dog.
My dog is bigger than your dog.
Use bigger or more big, never both. For short words, add -er.
This is the goodest pizza I have ever had.
This is the best pizza I have ever had.
The forms are good, better, best.
There are less students in the class this year.
There are fewer students in the class this year.
Students can be counted, so use fewer.
Of the two plans, I like the first one best.
Of the two plans, I like the first one better.
With only two things, use the -er form: better.
Where this rule is tested
Questions people ask
What is the rule for comparisons?
Compare like with like, and use the right comparing word. Use -er or more for two things and -est or most for three or more. Never double them: more taller is wrong.
How can I check my comparisons quickly?
Count them: if you could put a number in front, use fewer and number.
Where can I practice this for free?
In Owl Test Prep's Daily Grammar Fix: one sentence a day for everyone, plus practice sets of five on this rule. It is free, with no account.