до́лжен

must — Used to express obligation or suggestion. Usually translated as "must", "have to", "should" or "supposed to".

• О чем я должен говорить?

  Worüber soll ich sprechen?

  Tatoeba · sharptoothed · CC BY 2.0 FR

• Я должен думать о себе.

  Ich muß an mich selbst denken.

  Tatoeba · elread · CC BY 2.0 FR

should — Used to express likelihood. Usually translated as "should".

supposed, meant (to) (used to indicate an intention)

• Что я должен ему сказать?

  Was soll ich ihm sagen?

  Tatoeba · Ooneykcall · CC BY 2.0 FR

• Что я должен ей сказать?

  Was soll ich ihr sagen?

  Tatoeba · odexed · CC BY 2.0 FR

Usually translated as the verb "to owe", with the person indebted to in dative case and the thing owed in accusative case — Used to express indebtednessselten