Questions & Answers about אם אין לך זמן, אני אלך לבד.
Here אם means if.
It introduces a condition:
- אם אין לך זמן = if you don't have time
Hebrew אם can also mean whether in other contexts, but in this sentence it clearly means if.
Because Hebrew usually expresses having with יש/אין, not with a separate verb meaning to have.
So:
- יש לי זמן = literally there is time for me = I have time
- אין לי זמן = literally there isn't time for me = I don't have time
So אין לך זמן is the normal Hebrew way to say you don't have time.