I can browse you can browse she can browse we can browse you can browse they can browse
V-ing form
I can be browsing you can be browsing she can be browsing we can be browsing you can be browsing they can be browsing
Perfect
I can have browsed you can have browsed she can have browsed we can have browsed you can have browsed they can have browsed
V-ing perfect
I can have been browsing you can have been browsing she can have been browsing we can have been browsing you can have been browsing they can have been browsing
Negation
Simple form
I cannot browse you cannot browse she cannot browse we cannot browse you cannot browse they cannot browse
V-ing form
I cannot be browsing you cannot be browsing she cannot be browsing we cannot be browsing you cannot be browsing they cannot be browsing
Perfect
I cannot have browsed you cannot have browsed she cannot have browsed we cannot have browsed you cannot have browsed they cannot have browsed
V-ing perfect
I cannot have been browsing you cannot have been browsing she cannot have been browsing we cannot have been browsing you cannot have been browsing they cannot have been browsing
Interrogative form
Simple form
can I browse? can you browse? can she browse? can we browse? can you browse? can they browse?
V-ing form
can I be browsing? can you be browsing? can she be browsing? can we be browsing? can you be browsing? can they be browsing?
Perfect
can I have browsed? can you have browsed? can she have browsed? can we have browsed? can you have browsed? can they have browsed?
V-ing perfect
can I have been browsing? can you have been browsing? can she have been browsing? can we have been browsing? can you have been browsing? can they have been browsing?
Interro-negative form
Simple form
can I not browse? can you not browse? can she not browse? can we not browse? can you not browse? can they not browse?
V-ing form
can I not be browsing? can you not be browsing? can she not be browsing? can we not be browsing? can you not be browsing? can they not be browsing?
Perfect
can I not have browsed? can you not have browsed? can she not have browsed? can we not have browsed? can you not have browsed? can they not have browsed?
V-ing perfect
can I not have been browsing? can you not have been browsing? can she not have been browsing? can we not have been browsing? can you not have been browsing? can they not have been browsing?