1 If she leaves at five o'clock, she'll be there by half past seven. 2 We will call you if we have any problems. 3 It might not be a good idea to go out tonight if you have an important test in the morning. 4 If you have been ill all day, you shouldn't come to the club tonight. 5 If you should find my wallet, call me on my mobile immediately! 6 Let's get a different DVD if you have seen that one already. 7 If Sean has been working so hard lately, he'll welcome the chance to have a few days off. 8 If you're going into town, get a video for tonight while you're there! 9 If you see Carol tonight, don't forget to say hello from me! 10 Don't feel you have to come if you don't want to.