Choose the right negative form: 3. Sally has not been washing her since morning. / Sally has been not washing her since morning.

Перевод задания: Выберите правильную отрицательную форму.

Правильный вариант: Sally has not been washing her since morning. (Салли не моет её с самого утра.)

В Present Perfect Continuous частица not ставится после has и перед been.