Deduction - "MUST" in Present and Past
Your room smells like pizza and there’s cheese on the floor. You must _______________ eating a pizza. (PAST)
must have been
He has sand in his shoes and a sunburn. He must _______________________ at the beach. (PAST)
must have been
She’s smiling and holding a bunch of flowers. She ____________ happy. (PRESENT)
must be