Поставьте предложения в отрицательную форму: 1. mary and her friends are playing basketball now. (мэри и ее друзья сейчас играют в баскетбол) 2. their children are always making noise in the apartment. (их дети всегда играют в квартире) 3. they make experiments in the laboratory.
2. Their children are not always making noise in the apartment
3. They don`t make experiments in the laboratory.