When someone asks me "Could you call me at 10 pm?" can I say in response "Ok if I won't be too sleepy." ?
It sounds good to me but also it confuses me because there is no a conditional tense with the simple future in the "if clause".
Since the sentence
"Ok if I won't be too sleepy."
is a short form of
"Yes, I can if I won't bee too sleepy".
it seems that I should say (due to the grammar)
"Yes, I can if I'm not too sleepy"
but this sentence seems weird to me because it sounds like "if I'm not sleepy now". So, which sentence would be correct in this case?