Compounds of ねば

• ねば
  (exp) if not ... (negative conditional)
• ねばならぬ
  (exp) have to do
  must
  should
  ought to
• ねばならない
  (exp) have to do
  must
  should
  ought to
• ねばなるまい
  (exp) (after neg. verb stem) ought to (verb)
  should (verb)
• ねばなりません
  (exp) have to do
  must
  should
  ought to
• 物言わねば腹膨る
  (exp) (id) Feel uneasy if something is left unsaid
• 降り懸かる火の粉は払わねばならぬ
  (exp) (id) You must protect yourself against any possible dangers