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Review the passive-aggressive sticky notes left by a frustrated roommate. Select ALL the grammatically correct sentences that describe two actions happening at the exact same time in the past.
The correct answers are While I was scrubbing the floors, you were playing video games. and I was scrubbing the floors while you were playing video games.
To show that two ongoing actions were happening simultaneously in the past, we use the Past Continuous (was scrubbing, were playing) for both verbs. Mixing in present or perfect tenses here is incorrect!