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