ねばならない => Must 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
~ながら、 => While A, B N5
Verb suffixes
には[及「およ」]ばない => There is no need to A N1
Need/Requirements
ながら(も) => Although A, B N2
Contrast,Surprise
なければならない => Must do A; have to A N4
Can, Should, Must
なお => Furthermore, A N2
Miscellaneous
てばかりはいられない => Cannot always A N2
Needs, Requirements
ずにはおかない/ないではおかない => Will definitely A, N1
Will, Decision, Doing
そばから => As soon as A, B N1
Time, Situation
[恐「おそ」]れがある => There is a chance of A N2
Potential, Possibility
には[及「およ」]ばない => There is no need to A, Doesn't reach the level/ability A; can't compete with A N1
Comparison/ Exchange