かも[知「し」]れない => Might A, maybe A, perhaps A N3
Sentence Endings
~助詞+数量      => Corresponds to the verb...of quantity N5
Quantity
のを知っていますか => Do you know...? N4
なければならない/なくてはならない/なければいけない/なくてはいけない/なければだめ/なくてはだめ => must N5
ないでくれ => please don't N4
Ban
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”
ていられない => can't afford to; unable to ~ N2
まだV-られない => Not yet ~ N4
Ability
..... ばかりもいられない => can't keep doing ~ N2
Speculation
ではいられない => can't afford to; unable to N2
Base, base
おいそれと(は)…ない => Not easy, hard to N3
Invariant
ばかりはいられない => can’t keep doing ~ N2