could have forgotten - Sarah didn't bring her umbrella. She ________ it at home., must have been speeding - The roads were slippery. The driver ____________ to cause the accident., might have lost - We didn't hear from them all night. They __________ their phones., might have eaten - The cake is all gone. Someone _____________ it while we were out., must have worked - The project was completed ahead of schedule. He ______________ very efficiently.,

Perfect Modals: Match the perfect modal structure with the appropriate statement.

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