て[以来「いらい」] => After A, B (continuous action/condition N2
Information, Report
へ => Go to N, head to N , Often followed by verbs like 行く/いく, 来る/くる, 向かう/むかう… N5
Particles
ないものでもない/ないでもない => A is not completely impossible N1
Need/Requirements
ずにはおかない/ないではおかない => Will definitely A, N1
Will, Decision, Doing
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”
ずにはすまない/ないではすまない => A must be done N1
Potential, Possibility
ねばならない => Must A N2
Needs, Requirements
てならない => Very A; Extremely A N2
Degree, Level, Amount
にほかならない => Only A N2
Reason, Result, Response
そうにない => N2
Potential, Possibility
なくてはいけない => Must do A; have to A N4
Can, Should, Must
てかなわない => A is a problem N2
Adjectival, Descriptions