Zusammenfassung
1) Es gibt zu jeder Zeitform eine Verlaufsform (= progressive, continuous-Form)
2) Die Verlaufsform kann man als "Unterzeitform" der verwendeten Zeitform betrachten.
3) Die Verlaufsform stellen auf den Vollzug einer Handlung ab, beschreiben ein Ereignis als gerade stattfindend.
4) Die Verlaufsform wird gebildet, indem man von to be die entsprechende Zeitform bildet und mit dem Partizip I (Verb + -ing) verbindet.
5) Die Verlaufsform wird oft verwendet, um eine Handlung, die von einer anderen unterbrochen wird, darzusellen.
6) Oft sind Handlungen in der Verlaufsform von nur kurzer Dauer, die Dauer eines Ereignisses ist also kein Argument für oder gegen die Verwendung der Verlaufsform.
Beispiele to study Modalverben Verneinung
simple present you study you can study you do not study;
you cannot study
present
continuous
you are studying you can be studying you are not studying;
you cannot be studying
simple past you studied you could study you did not study
you could not study
past
continuous
you were studying you could be studying you were not studying;
you could not be studying
present perfect you have studied you can have studied you have not studied;
you could not have studied
present perfect continuous you have been studying you can have been studying you have not been studying;
you could not have been studying
past perfect you had studied you could had studied you had not studied
past perfect continuous you had been studying you could had been studying you had not been studying