Your jacket isn't in the wardrobe. You must have left it in the car. I can't find my wallet anywhere. Somebody must have stolen it. I don't have Eliza's number in my phone. I must have forgotten to save it. The whole house is really clean. It must have taken you all day! Damien and Arthur should be here by now. They must have lost their way. Rebecca looks really sad today. She must have had some bad news. Situations Explanations