Read the box. Then, rewrite the sentences using unless. unless = if not 1 If we don't get tickets, we won't see the concert.

2 Don't go unless you are sure she's at home.
3 You can't fix it unless you know how to do It.
4 You can’t sit here unless you have a reservation.
5 You'll miss the bus unless you leave now.
6 The electricity bill will be cut off unless we pay it.