This paper analyzes the linguistic and sociolinguistic distribution of future forms (morphological -FM- or periphrastic variants -FP-) in 1519 examples from 36 speakers, a fraction in the materials included in the Sociolinguistic corpus of Mexico City. Main results are three: 1) even though FM is still alive in Mexico City, its use is residual in several ways; 2) more significant variables are referred to the sort of variation between forms, temporal distance, epistemic character, presence of a negative domain, school years and age, among others; 3) the process -a change from below- is in its last steps. [ABSTRACT FROM AUTHOR]