Răspuns:
1) We can't help you unless you tell us what the problem is.
2) I can lend you the money as long as you give it back to me by the weekend.
3) I can give you a lift, provided that we leave right away.
4) He is due to leave work at 4 o'clock tommorow afternoon.
5) Take a coat with you, in case it gets cold later.