These verbs cannot be used in normal passive constructions, because German allows these only for verbs with accusative objects. It is therefore ungrammatical to say: *"Ich werde geholfen." "I am helped." Instead a special construction called "impersonal passive" must be used: "Mir wird geholfen", literally: "To me is helped." A colloquial (non-standard) way to form the passive voice for dative verbs is the following: "Ich kriege geholfen", or: "Ich bekomme geholfen", literally: "I get helped". The use of the verb "to get" here reminds us that the dative case has something to do with giving and receiving. In German, help is not something you "perform on" somebody, but rather something you "offer" them.