Comparatives, more, less, fewer

The big dog eats more than the little dog.

• Correct

• Incorrect

I drink less coffee than my boss does.

• Correct

• Incorrect

You have less opportunities than I do.

• Correct

• Incorrect

She spends fewer time going to the store.

• Correct

• Incorrect

He spends more money than his wife does.

• Correct

• Incorrect