[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
べくもない => Can't A, can't expect to A N1
Potential, Possibility
べきだ/べきではない => Should do A; Must do A, Should not do A; Must not do A N3
Needs, Requirement
ずにはいられない/ないではいられない => Can't help but A; A is unavoidable N2
Will, Decision, “Doing”
とはくらべ[物「もの」]にならない => It's no match for A N1
Comparison/ Exchange
ていられない => Cannot continue to A N2
Needs, Requirements
なければならない => Must do A; have to A N4
Can, Should, Must
に[比「くら」]べて/に[比「くら」]べ => When compared to A N3
Comparison, Exchange
てばかりはいられない => Cannot always A N2
Needs, Requirements
~かもしれない => Might A, maybe A, perhaps A N4
Sentence Endings
べからざる => Cannot A N1
Potential, Possibility
かも[知「し」]れない => Might A, maybe A, perhaps A N3
Sentence Endings