Are these sentences correct?
1. Our group was a weird combination of people, from the most brilliant to borderline idiots. “Idiots” may be an exaggeration, but it really felt like that at times.
2. He was not only a sports fan, he was a sportsman himself and played soccer for the college team.
NOT A TEACHER
I'd say they're both fine, although personally (and I may be in a minority of one here!) I don't like this use of weird. Using it this way in informal English speech and writing is not only perfectly acceptable, it's heard very frequently – but really weird means 'unearthly', and I think it's more effective to keep it to this use. You could say bizarre or strange instead, which I think would be stronger.
NOT A TEACHER
(1) Maybe (maybe!) some native speakers would be expecting an "also" after
"not only" and would find its absence a little bit strange or incomplete.
(a) He was not only a sports fan, he was also a sportsman himself and ....
(2) In fact, on further consideration, maybe (especially in writing), some speakers
might (might!) be expecting the conjunction, too:
He was not only a sports fan, but he was also ....
@ sane,
Ask unrelated questions in separate threads.
The first could be titled Our group was a weird combination of people and the second He was not only a sports fan.
Rover