"Saya coba kalau saya punya waktu."
Terjemahan:I try if I have time.
Tidak. "I will try if I have time" dan "I will try when I have time": Tidak sama.
I will try when I have time: I will have time, that's certain, and I will try.
I will try IF I have time: Maybe I will try, maybe I won't try. Trying is not very important, I will do it only if I have enough time.
"When" dan "If" = sangat berbeda.