Rule 1: 1. أَمَّا ... فَـ 'as for'
To bring a new subject forward Arabic says أَمَّا as for, names the subject in the nominative, and begins the statement about it with فَـ, which is never omitted: أَمَّا قُصَيٌّ فَاسْمُهُ زَيْدٌ as for Quṣayy, his name was Zayd. The فَـ may be attached to a noun, a pronoun, a verb or a preposition. The construction often contrasts two parties: أَمَّا الْكِبَارُ فَسَافَرُوا وَأَمَّا الصِّغَارُ فَبَقُوا.
أَمَّا قُصَيٌّ فَاسْمُهُ زَيْدٌ.
ammā quṣayyun fa-smuhu zaydun
As for Quṣayy, his name was Zayd.
أَمَّا أَبُوهُ فَمَاتَ وَهُوَ صَغِيرٌ.
ammā abūhu fa-māta wa-huwa ṣaghīrun
As for his father, he died while he was small.
أَمَّا سِيرَتُهُ فَهِيَ كَمَا يَلِي.
ammā sīratuhu fa-hiya kamā yalī
As for his life story, it is as follows.
كَمَا يَلِي 'as follows' introduces a narrative.
أَمَّا خُزَاعَةُ فَكَانَتْ وِلَايَةُ الْبَيْتِ لَهَا.
ammā khuzāʿatu fa-kānat wilāyatu l-bayti lahā
As for Khuzāʿa, the custody of the House belonged to them.