I can browse you can browse he can browse we can browse you can browse they can browse
V-ing form
I can be browsing you can be browsing he can be browsing we can be browsing you can be browsing they can be browsing
Perfect
I can have browsed you can have browsed he 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 he can have been browsing we can have been browsing you can have been browsing they can have been browsing
Negation
Simple form
I can't browse you can't browse he can't browse we can't browse you can't browse they can't browse
V-ing form
I can't be browsing you can't be browsing he can't be browsing we can't be browsing you can't be browsing they can't be browsing
Perfect
I can't have browsed you can't have browsed he can't have browsed we can't have browsed you can't have browsed they can't have browsed
V-ing perfect
I can't have been browsing you can't have been browsing he can't have been browsing we can't have been browsing you can't have been browsing they can't have been browsing
Interrogative form
Simple form
can I browse? can you browse? can he browse? can we browse? can you browse? can they browse?
V-ing form
can I be browsing? can you be browsing? can he be browsing? can we be browsing? can you be browsing? can they be browsing?
Perfect
can I have browsed? can you have browsed? can he 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 he have been browsing? can we have been browsing? can you have been browsing? can they have been browsing?
Interro-negative form
Simple form
can't I browse? can't you browse? can't he browse? can't we browse? can't you browse? can't they browse?
V-ing form
can't I be browsing? can't you be browsing? can't he be browsing? can't we be browsing? can't you be browsing? can't they be browsing?
Perfect
can't I have browsed? can't you have browsed? can't he have browsed? can't we have browsed? can't you have browsed? can't they have browsed?
V-ing perfect
can't I have been browsing? can't you have been browsing? can't he have been browsing? can't we have been browsing? can't you have been browsing? can't they have been browsing?