Please, help me. ex5. Study the examples. Then, rewrite the sentences using the modals in bold.
1) I'm sure she didn't to 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)