Aristotle’s viewpoints on modal propositions have been subjects of debate and exploration among scholars since his immediate successors. This study delves into how Aristotle defines assertoric and modal propositions and elucidates the correlations between these propositions and assertoric ones. Traditionally, commentators have interpreted propositions based on the premise that what belongs to the subject also belongs to the predicate. However, in this research, propositions are interpreted as ones in which what is predicated on the predicate will also be predicated on the subject. The outcome of this investigation demonstrates the modal premise process through the Barbara and Celarent syllogism forms in the first figure, which can be reduced to encompass all other forms.