We have been repairing our old broken car for all day, She has been vacuuming carpet because she dropped chips, How long have you been polishing the glasses? - For several hours, I’m so bored, How long has he been mopping the floor? It’s still dirty!, They have been dusting the furniture and sweeping the floor since morning because they’re having guests in the evening, Has mum been ironing my dress for thirty minutes ? - No, longer,

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