Put the verb in the brackets in the right form. я сейчас проветривают палату - i(air) the ward now каждое утро - i (air) the ward every morning уже 15 минут - i (air) the ward for 15 minutes
Я сейчас проветриваю палату - I am airing the ward now. Каждое утро - I air the ward every morning. Уже 15 минут - I have been airing the ward for 15 minutes.
Каждое утро - I air the ward every morning.
Уже 15 минут - I have been airing the ward for 15 minutes.