Present Perfect Progressive(Формы настоящего завершенно-длительного времени), поставить предложения в вопросительную, и отрицательную форму.
1)Sasha has been studying English for two years.
2)Sasha and Joey have been playing for an hour. 
Срочно!!!!Прошу пожалуйста помогите!

1) Has Sasha been studying English for two years? 2) Have Sasha and Joey been playing for an hour?1) Sasha has not been studying English for two years. 2) Sasha and Joey have not been playing for an hour.