Put if or when into each gap.

1)__________ can*t do your homework ask for help.
2)I*ll pay money back _______ I se you again.
3)I*ll come to bed __________ this TV programme ends.
4)_________anyone phones me tell them I am out.
5)_________I play chess with Aidar he always wins.
6)Come on!___________we hurry we*ll catch the bus.