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
それなのに => and yet; despite this; but even so ~ N2
それなのに => Even though A, (unexpected result) B N2
Contrast,Surprise
... ないものは ...ない => is not entirely impossible N3
Ability
…の…ないの => thinking whether or not to do something... N2
Position, perspective
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
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