Ram has been doing housework all day.
общий: Has Ram been doing housework all day?
альтернативный: Has Ram been doing housework or homework all day?
специальный: What has Ram been doing all day? или How long has Ram been doing housework?
к подлежащему: Who has been doing housework all day?
разделительный: Ram has been doing housework all day, hasn't he?