الجواز و المنع عند سيبويه و الفراء في المسائل النحوية

الملخص EN

This research has dealt with an important issue of Arabic grammar, which is the issue of permissibility and grammatical prohibition, so the title of the research came as follows: Permissibility and prohibition in Sibawayh and furs in grammatical matters.

I chose some issues of permissibility and prohibition according to these two major sciences, as it is difficult to find out all the issues of permissibility and prohibition in both, and then I studied these issues according to the following:
First: Bringing the grammatical question from its main source, and explaining it.

Second: Standing on the opinions of grammarians on this issue in terms of permissibility and prohibition.

Third: Stating the preponderant opinion on the grammatical issue, along with the reasons for that.