Contemporary Arabic dialects are another matter. One major change from al-fuṣḥā is the use of a prefix particle ( bi in Egyptian and Levantine dialects—though it may have a slightly different range of functions in each dialect) to explicitly mark progressive, continuous, or habitual aspect: , bi-yiktib, he is now writing, writes all the time, etc.
Contemporary Arabic dialects are another matter. One major change from al-fuṣḥā is the use of a prefix particle ( bi in Egyptian and Levantine dialects—though it may have a slightly different range of functions in each dialect) to explicitly mark progressive, continuous, or habitual aspect:  bi-yiktib, he is now writing, wr,ites all the time, etc.