Preverbs in Mongolian are put immediately before verb and represents an emphatic meanings of an action. We investigated the corpus and found that preverbs were often used with surface contact verbs (referred to as “hitting verb”) and that they change the hitting verb into the breaking verb (a function that we refer to as “breaking-verbalization”). The difference between the hitting verbs, which prefer to follow a preverb, and the breaking verbs, which are derived from preverbs, is that the hitting verb can take a directive case object and breaking verbs can indicate a state change. From this view point, the construction, preverb + verb, has a feature similar to that of breaking verbs.