Ram has been doing hous work all day.

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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?