なければならない => Must do A; have to A N4
Can, Should, Must
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 => Cannot continue to A N2
Needs, Requirements
ながらに,ながらの,ながらにして => While A, during the condition A, Since A (point in time) N1
Time, Situation
てばかりはいられない => Cannot always A N2
Needs, Requirements
~ながら、 => While A, B N5
Verb suffixes
わけがない => There's no reason for A (A should not be possible) N3
Potential, Possibility
[続「つづ」]ける => continues, to continue to N4
Secondary Verb
ながら(も) => Although A, B N2
Contrast,Surprise
につれて => As A changes, B changes (together) N2
Information, Report
につけ => During both times/situations A and B, N2
Time, Situation
それなら => If A is the case, then (let's) B N2
Reason, Result, Response