Here's my attempt on the third sentence:

Aayasmaapi kho Raahulo pubba.nhasamaya.m
nivaasetvaa pattaciivaramaadaaya
Bhagavanta.m pi.t.thito pi.t.thito anubandhi.

Aayasmaapi (Aayasmaa + pi) = Venerable + too
kho = (affirmative emphasis)
Raahulo = Raahula (in nominative)
pubba.nhasamaya.m = when it was morning
nivaasetvaa = having dressed
pattaciivaramaadaaya = having taken (his) robe and bowl
Bhagavanta.m = the Blessed One
pi.t.thito (pi.t.thi + to) = from behind
pi.t.thito pi.t.thito = closely from behind
anubandhi = followed

Venerable Raahula too, when it was morning,
having dressed and taken his robe and bowl,
followed the Blessed One closely from behind.

Do feel free to comment.

peace

Ven Kumâra