ENThe article focuses on the analysis of forms of praesens and futurum perfect and imperfect excerpted from the Supraśl Chronicle, which belongs to the first Belorussian-Lithuanian compilation. In the examined text the forms of present and future I tenses are frequently observed. However, not a single form of futurum imperfect of type II has been found. The forms of third person singular futurum perfect are used as praesens historicum.