In Swedish, there are three forms of verbs-the active, passive, and deponent. The auxiliary verbs are divided by Swedish grammarians into three classes: (1) temporala, or those which help to form compound tenses; as, hafva, 'to have,' and skola, 'shall' or 'will;' (2) modala, or those which serve to express different moods; as, må, måste (defect.), 'may,' 'must;' kunna, 'can;' låta, 'let;' vilja, 'will;' böra, 'ought;' (3) passiva, or those which serve to conjugate the passive; as, vara, 'be;' varda, blifva, 'become.'