The comparative for the adjective troubled is either "more troubled" or "less troubled" - depending on how it compares.
it has no comparitive form; it is an adverb comparitive of SWIFT is more swift
wiser
It is noisier.
comparitive negligence
more useful and most useful
The comparitive form of the word nice is nicer, but whatever you do, don't just add 'er' onto the end of every word to make it comparitive!
The surface of the waters were troubled by the school of fish.
Comparative: more troubled Superlative:most troubled
Comparitive advantage.
more troubled and most troubled
the most troubled
most troubled