The forms of itnab differ in purpose: one highlights a special item; another widens scope; others clarify, reinforce, or protect the intended sense.
FormDistinct benefit
Specific after generalSpecial prominence
General after specificExpanded scope
Clarification after ambiguityUnfolding a general statement
Tawshi‘Explanation by a pair
TakrirEmphasis, encouragement or warning
I‘tiradUseful parenthetical clause
IghalStronger close
TadhyilIndependent reinforcing sentence
IhtirasProtection from misunderstanding
TakmilGreater excellence or beauty