1) I'm out until 7.30, remember? Your dinner's in the fridge; you don't have to do much – just put it in the microwave. It heat for five minutes.
2) Jim phoned – you mustn't miss football practice tonight. It's important!
3) You don't have to take the dog for a walk because Sue took him this afternoon, but you must tidy your room. It's a mess!
4) Oh yes, and you have to finish your History project. It's nearly Friday! And you mustn't forget to feed the dog at 6.30.