[恐「おそ」]れがある => There is a chance of A N2
Potential, Possibility
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
~ながら、 => While A, B N5
Verb suffixes
ながら(も) => Although A, B N2
Contrast,Surprise
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
なければならない => Must do A; have to A N4
Can, Should, Must
それなら => If A is the case, then (let's) B N2
Reason, Result, Response
てばかりはいられない => Cannot always A N2
Needs, Requirements
てくれてありがとう => Thank you for doing A N4
Honorifics
なら => If N4
Conditional
それが => Although (you'd expect) A, (actually) B, Even though A was planned, B N2
Contrast,Surprise