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You're explaining to your best friend why you missed their urgent call about free pizza at 8 PM last night. Select ALL the valid excuses that correctly form the past continuous tense.
The correct answers are At 8 PM, I was desperately trying to assemble a bookshelf. and I was watching a documentary about cheese when you called.
The past continuous is used to say that you were in the middle of doing something at a specific time in the past (like 8 PM).
The structure always requires an -ing verb after was/were. "Was try" and "was watched" are grammatically incorrect combinations.