We use the comparative to compare one person or thing with (an)other person(s) or thing(s).
We use the superlative to compare one person or thing with his/her/its whole group.
Mary’s taller than her three sisters.
Mary’s the tallest of the four girls.
Your accent is worse than mine.
Your accent is the worst in the class.
Paul is older than Charles. Sally is younger than Paul. Albert is older than Sally. Charles is younger than Sally. Paul is younger than Eric. Eric is older than Albert. Who is the oldest? Who is the youngest?
The weather’s better than yesterday.
(NOT . . .
You sing better than me. (OR . than I do.) (For I and me etc after than, see 331.4.)
Mary’s taller than her three sisters. Mary’s the tallest of the four girls.
adjective + -er and adjective + -er more and more + adjective/adverb I’m getting fatter and fatter We’re going more and more slowly.
the + comparative + subject + verb, the + comparative + subject + verb
The older I get, the happier I am. (NOT Older I get .. .)
The more dangerous it is, the more I like it.
(NOT The more it is dangerous, . . .)
The more I study, the less I learn.
I’m the happiest man in the world. (NOT . . . of the world.)
It’s the best book I’ve ever read. (NOT It’s best book . . .)
You ‘re the nicest of all.
Which one do you think is the best7