My sister buys bread every day страдательный залог общий вопрос к подлежащему отрицательный

My sister buys bread every day
страдательный залог Bread is bought by my sister every day.
общий вопрос Does my sister buy bread every day? 
к подлежащему  Who  buys bread every day?
отрицательный My sister doesn't buy  bread every day .