Usage patterns
是非〈動詞〉たいto really want to do ~, by all means
I really want to see that movie.
〈事〉の是非を問うto question whether ~ is right or wrong
Voices are being raised questioning whether this plan is right or wrong.
是非〈動詞〉てくださいplease do ~, by all means (a warm request or invitation)
〈事〉の是非を論じるto debate the pros and cons of ~
Experts debated the pros and cons of the policy.
Expressions
是非もないunavoidable; inevitable; there's no help for it 是非もなしit can't be helped; there is no choice; inevitable 是非に及ばずunavoidable; inevitable; cannot be helped