While he was trying to turn off his phone, he dropped it, We were watching the play when his phone rang, I was having a shower when the bell rang, The actor was reading the script when the boy took a photo, When the curtain went up the woman was repairing the lights, They were cleaning the stage when the audience arrived, The audience arrived while they were cleaning the stage, When she found the costumes, we were putting on make-up, I was walking down the street when I saw the accident.,

Past continuous: while and when

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