Originally, the only way I knew express the third person in MSA was with هـو / هـي but I recently learned about the construction with 'inahu' and 'inahaa'. -Are these the same? -Are they used interchangeably? -Can you make other pronouns with the construction ina+...? (For example could you say ina-naa = we, etc.?) -Why does this form exist? شكرا everyone.