Mā can be additional after certain prepositions in attested constructions, including bi-mā, ʿan-mā, and min-mā. These are not unrestricted productive combinations.
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Additional Mā after Certain Prepositions
Additional Particles: Seven Forms, Emphasis and Syntactic Case
Mā can be additional after certain prepositions in attested constructions, including bi-mā, ʿan-mā, and min-mā. These are not unrestricted productive combinations.