shop. 3 Grammar Modals for speculating Speculating with more certainty Speculating with less certainty He must be really busy. He started a He could be upset about something. new job. Maybe you did something to him. He must not leave his house very He may not like his new jo. Lhaven't often. He always seems to be busy. heard how he likes it He can't be upset with me. I haven't He might be feeling stressed out. His done anything to him. new job may be a lot of work A circle the correct words. Then compare with a partner. 1. I don't know his weekend plans. He must could drop by on Saturday 2. she didn't say much on the phone to him. They must not might be getting along. 3. They must may not come to the party. They're going out to dinner that night. 4. She can't could take after her father. She's really tall, but he's pretty short. 5. You're coughing and sneezing so much. You must must not be getting sick. 6. They can't might be tired. Maybe they stayed up late to study for the test. B Read the situations. Complete the sentences with your own ideas. Then compare with a partner.