1. She must be ill.
2. Someone must have stolen it.
3. You can’t have finished it already!
4. I must have forgotten to turn it off last night.
5. They can’t have paid cash.
6. They must be having a party.
7. She can’t be married.
8. You can’t have understood what I said.
9. They must have gone away.
10.It must be raining.

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