 The case of modal logics is probably one in which the process of distinguishing between subplays is made the most explicit. The idea of the dialogical approach to modal logics is to add a further element to the information about moves: in addition to the player who performs the move, and the nature of the move (statement or request), each move comes with a label indicating in which dialogical context it is performed. The particle rules for modal operators define how changes of dialogical contexts are triggered. The result is the generation of different subplays which are distinguished by the dialogical contexts assigned to them. Accordingly, and given the usual definition of the basic modal language, the particle rules are: