1. He lives in a cell. – He must be a prisoner 2. They're shouting at each other. – They must be having a row 3. I don't think he is telling the truth. – He must be lying 4. I can't find my purse anywhere. – I must have lost it somewhere 5. The dress is gorgeous. – It must have cost you a fortune (OR It must cost a fortune) 6. The leaves on the trees are golden. – It must be autumn 7. The two sisters look alike. – They must be twins 8. The little girl is blowing out the candles on the cake. – She must be celebrating her birthday 9.1 phoned you last night but I got no answer. – There must have been no one at home 10. He was shining like a new penny. – He must have had a shower 11. Everybody is congratulating the producer. -- The film must be a huge success 12. The patient is in the maternity ward of the hospital. – She must be giving birth to a child 13. The creature is green and has an antenna on its head. – It must be an alien 14. The audience is shouting for more. – They must be having a good time at the concert of their favourite singer 15. The hotel had no vacancies – It must have been booked in advance
