In a traditional family the man earns all the income and the wife stays home. — В традиционной семье мужчина зарабатывает все доходы, а жена остается дома.The income is earned by the man and the wife stays home in a traditional family. — Доход зарабатывается мужчиной, а жена остается дома в традиционной семье. The first sentence is in active voice and the second sentence is in passive voice. In active voice the doer is important and in passive voice the action is important. The predicate of the passive voice is formed with the help of to be + the third form of the verb.