1. Tom should have studied maths. - Did Tom study maths?

2. It may have rained heavily. - Did it rain heavily?

3. We did not need to redecorate the kitchen. - Did we redecorate the kitchen?

4. My brother needn't have weeded the lawn. - Did my brother weed the lawn?

5. The Smiths should not have spent so much money. - Did the Smiths spend a lot of money?

6. Robert can't have met Julia last night? - Did Robert meet Julia last night?

7. The manager may have signed the contract. - Did the manager sign the contract?

8. Tom ought to have been careful. - Was Tom careful?

9. They oughtn't to have taken a taxi? - Did they take the taxi?

10. I must have left my umbrella on the bus. - Did I leave my umbrella on the bus?