Editing Grammatical aspect (section)

===Creole languages===
[[Creole language]]s<ref>Holm, John, ''An Introduction to Pidgins and Creoles'', Cambridge Univ. Press, 2000: pp. 173–189.</ref> typically use the unmarked verb for timeless habitual aspect, or for stative aspect, or for perfective aspect in the past. Invariant pre-verbal markers are often used. Non-stative verbs typically can optionally be marked for the progressive, habitual, completive, or irrealis aspect. The progressive in English-based [[Atlantic Creole]]s often uses ''de'' (from English "be"). [[Jamaican Creole]] uses ''a'' (from English "are") or ''de'' for the present progressive and a combination of the past time marker (''did'', ''behn'', ''ehn'' or ''wehn'') and the progressive marker (''a'' or ''de'') for the past progressive (e.g. ''did a'' or ''wehn de''). [[Haitian Creole]] uses the progressive marker ''ap''. Some Atlantic Creoles use one marker for both the habitual and progressive aspects. In [[Tok Pisin]], the optional progressive marker follows the verb. Completive markers tend to come from superstrate words like "done" or "finish", and some creoles model the future/irrealis marker on the superstrate word for "go".