1. Jamal didn't come into work last week. He <em><u>must</u></em> <em><u>have been</u></em> ill.
2. Joel did the opposite of what we discussed. He <em><u>must have understood</u></em> our conversation.
3. Tim <em><u>must have passed</u></em> his driving test. He's bought a new car.
4. I found Angela's ID card under my desk. She <em><u>must have dropped</u></em> it.
5. Isabel looks absolutely terrible. She <em><u>must have</u></em> <em><u>gone out last night</u></em>.
6. The plane <em><u>can't have arrived</u></em> on time. There was a strike at the airport.
7. Where's Clare? Her bag's here and her computer's still on so she <em><u>can't have gone</u></em> home.
8. Sorry, I don't know if she's here or not. She was feeling ill so she <em><u>must have gone</u></em> home.
9. She <em><u>can't have cleaned</u></em> the whole house on her own in two hours. She must have had some help.
10. Oh, great! His car's here. He <em><u>must have come</u></em> home earlier than planned.
<em>Hope I'm right. </em>