I could browse you could browse he could browse we could browse you could browse they could browse
Forme en V-ing
I could be browsing you could be browsing he could be browsing we could be browsing you could be browsing they could be browsing
Perfect
I could have browsed you could have browsed he could have browsed we could have browsed you could have browsed they could have browsed
Perfect en V-ing
I could have been browsing you could have been browsing he could have been browsing we could have been browsing you could have been browsing they could have been browsing
Négation
Forme simple
I could not browse you could not browse he could not browse we could not browse you could not browse they could not browse
Forme en V-ing
I could not be browsing you could not be browsing he could not be browsing we could not be browsing you could not be browsing they could not be browsing
Perfect
I could not have browsed you could not have browsed he could not have browsed we could not have browsed you could not have browsed they could not have browsed
Perfect en V-ing
I could not have been browsing you could not have been browsing he could not have been browsing we could not have been browsing you could not have been browsing they could not have been browsing
Forme interrogative
Forme simple
could I browse? could you browse? could he browse? could we browse? could you browse? could they browse?
Forme en V-ing
could I be browsing? could you be browsing? could he be browsing? could we be browsing? could you be browsing? could they be browsing?
Perfect
could I have browsed? could you have browsed? could he have browsed? could we have browsed? could you have browsed? could they have browsed?
Perfect en V-ing
could I have been browsing? could you have been browsing? could he have been browsing? could we have been browsing? could you have been browsing? could they have been browsing?
Forme interro-négative
Forme simple
could I not browse? could you not browse? could he not browse? could we not browse? could you not browse? could they not browse?
Forme en V-ing
could I not be browsing? could you not be browsing? could he not be browsing? could we not be browsing? could you not be browsing? could they not be browsing?
Perfect
could I not have browsed? could you not have browsed? could he not have browsed? could we not have browsed? could you not have browsed? could they not have browsed?
Perfect en V-ing
could I not have been browsing? could you not have been browsing? could he not have been browsing? could we not have been browsing? could you not have been browsing? could they not have been browsing?