ねばならない/ねばならぬ/ねば => have to do; must; should ~ N2
ね => isn't it? right? eh? N5
かねない => Afraid that N2
Potential, Possibility
ね => Requests confirmation from the listener N5
Particles
…とばかりおもっていた => Thought that ... N3
Speculation
てっきり...と思う => surely; certainly; without a doubt N3
かねる => unable to do something; can’t do something N2
ねばならない => Must A N2
Needs, Requirements
よりいっそ => I'd rather... than... N2
Description
かねない => (someone) might do something; something might happen N2
さっぱり…ない => nothing/ absolutely not… N2
Position, perspective
とおり => Several ways N4
Means and methods