Ex5
Study the examples. Then, rewrite the sentences using the modals in bold.
He must have left by now. (I'm sure he left.) They are late. They may/might have lost their way. (It was possible.) He can't have eaten the whole cake. (I'm sure he didn't do it.) You should have booked a table. (but you didn't)
• 1 I'm sure she didn't do the shopping. (CAN'T)
• 2 I'm sure Mum bought us some doughnuts. (MUST)
• 3 They wanted to buy a cake for his birthday but they didn't. (SHOULD)
• 4 It was possible that she had left the invitation at home. (MAY)
• 5 I'm sure the decorations cost a lot. (MUST)
• 6 He isn't feeling well; he ate too many sweets. (SHOULDN'T)

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