Be behind someone, be ahead of someone

Question

Are the phrases I used in the sentences below used in English? Are they natural and common in colloquial language?..

Like someone falls behind someone, can these sentences be used:

I'm behind everyone my age.

I'm behind my class.

And similarly can "ahead of someone " be used to mean that someone is "better thank someone ".

I'm ahead of a lot of kids my age.

I'm ahead of everyone in my class.

So these sound natural and is it common and used ?

Answer 1

Yes, those are natural. Without anything in context to make it more specific, one would generally take it to mean that they had made less/more progress in their studies - either for the "age" case if it was a kid, or the "my class" case whatever the age.