In Juba Arabic ma and be express comitative and instrumental respectively; notwithstanding, we maintain that there is a semantic overlap between the two elements. Note that the two items are present in Arabic where they are semantically well differentiated.
Source: Manfredi 2005: 125
Source: Manfredi 2005: 124
Source: Manfredi 2005: 125
Source: Manfredi 2005: 125