Any Bulgarian philologist will be surprised by so numerous verbal forms with temporal and modal meanings in the Bulgarian language. Those forms' meanings are not redundant. Net representation of temporal and modal meanings of Bulgarian verbal forms fully reflects the temporal and modal system of the Bulgarian language. It proves that even such a complicated verbal system as Bulgarian can be described with the help of a simple model of Petri nets concepts, i.e. the concepts of state, event and their combination, the speech state and conditionality law.