This present article is dedicated to the study of tense and modality in Kwame Nkrumah’s speech delivered in May 1963 at the meeting of African Heads of States and Governments. Indeed, during this historic occasion, Nkrumah has made use of tense and modality to express his point of view related to the validation of the predicative relation, to the assessment of African states situation, to the creation of African unity and to the consequences that might result from this unity. Furthermore, he has expressed his commitment, his determination and made suggestion and given advice to mark a break of the situation they were enduring.