دلالة التوقع في ( لما ) في النحو العربي

This subject has a great importance as the significance of articles and letters affect the direction of the Arabic sentence according to the speaker`s purpose. So the research attempts to prove the following:-1. (Lemma) refers to negate the occurrence of the event in the past with the prospecting of it in the future, while (Lem) refer to negate the occurrence of the event in the past only without the prospecting of it in the future; the affix came for special significance, the Qura`nic grammar distinguishes between the two evidences:- ((Lem) and (Lemma).2.(Lemma) had obtained this significance from the affix of (ma), as its origin is (lem) to which (ma) had been added and that gives it new meaning to include prospecting and waiting and to need a longer time to be done.