This text examines the ontological distinction between the categories of being and non-being, with a specific focus on temporality. The author argues that absolute non-being cannot be the subject of discourse, shifting the focus to an analysis of various modes of existence. A distinction is made between that which is currently present (hic et nunc) and that which relates to the past or the future. A significant aspect of the text is the subtle differentiation within these temporal categories. Regarding the past, it distinguishes between events that have already begun but have not yet concluded as a whole, and those that are fully past. Similarly, for the future, the text differentiates between the impending, which is already preparing to occur, and potential future events that are not yet ready to emerge. This phenomenological inquiry into the structure of time demonstrates that existence is not a monolithic state but a dynamic process with varying degrees of actuality and preparation, requiring precise terminological differentiation to grasp the nature of being in time.