Die Logik ist und bleibt dieselbe. Die Zeitform wird gebildet mit dem Hilfsverb to be und dem Partizip I. Zur Wiederholung des present perfect kann man sich das Kapitel 8.3.1 noch einmal ansehen.

to have= present perfect + Partizip II + Vollverb + Endung -ing = Verlaufsform
he has been do ing he has been doing
she has been writ(e) ing she has been writing
we have been been ing we have been jumping
they have been sell ing they have been selling
you have been study ing you have been studying
I have been watch ing I have been watching