のが上手 => to be good at doing something N5
のが下手 => to be bad at doing something N5
ひとり ... のみならず => not only…, not just… N2
Add
のを知っていますか => Do you know...? N4
~のを => Nominalize verbs N5
Nominalization
(の) なら~するな => If...then don't... N3
Condition (hypothetical condition)
手前 => considering; before; in front of; one’s standpoint N1
...を...にする => to make something ~ N4
Purpose, target
すら/ですら => even ~ (with emphasis) N1
~すればいいものを => if only (someone) would do (something), should have done (something) N1
Criticize
すら,ですら => Even A N1
(Not)only , (Not) even
を…とする => is considered, is regarded as N2
Consider it