Fa, like waw, joins expressions, but normally adds succession: the second occurrence follows the first in a connected sequence.
«الفاء: للتعقيب مع الوصل»
Fa expresses immediate succession with connection.
Order: the second comes after the first.
Immediacy: no unrelated intervening delay is signalled.
Connection: the two elements belong to one linked expression.
For example, “Zayd entered, then immediately sat” illustrates the normal sense. This additional teaching example prepares us for the text’s legal cases.