Latin verbs have four main patterns of
conjugation. As in a number of other languages, most Latin verbs have an
active voice and a
passive voice. There also exist
deponent and semi-deponent Latin verbs (verbs with a passive form but active meaning), as well as
defective verbs (verbs with a perfect form but present meaning). Sometimes the verbs of the third conjugation with a present stem on -i (short
i) are regarded as a separate pattern of conjugation, and are called the fifth conjugation, or third-io conjugation.