Complex sentence: Mr Rashid completed his primary education at Ngambwa in the Chake-Chake district of Pemba and attends his secondary education at Shamiani Secondary School until he completed form three then he joined Fidel Castro Secondary school where he completed his secondary education.
Split into simpler sentences: Mr Rashid completed his primary education at Ngambwa in the Chake-Chake district of Pemba and attended his secondary education at Shamiani Secondary School. When he completed form three he enrolled at Fidel Castro Secondary school where he completed his secondary education.