«إن كانت الشمس طالعة فالنهار موجود»
If the sun has risen, daylight exists.
The expression contains two propositional components:
“الشمس طالعة” — The sun has risen.
“النهار موجود” — Daylight exists.
The construction “إن ... فـ” places them in a conditional relation. Its point is the connection between sunrise and daylight, not a separate assertion that the sun has already risen at the moment of speaking.
Recognizing both components reveals the structure of the conditional.