I can publish you can publish he can publish we can publish you can publish they can publish
V-ing form
I can be publishing you can be publishing he can be publishing we can be publishing you can be publishing they can be publishing
Perfect
I can have published you can have published he can have published we can have published you can have published they can have published
V-ing perfect
I can have been publishing you can have been publishing he can have been publishing we can have been publishing you can have been publishing they can have been publishing
Negation
Simple form
I can't publish you can't publish he can't publish we can't publish you can't publish they can't publish
V-ing form
I can't be publishing you can't be publishing he can't be publishing we can't be publishing you can't be publishing they can't be publishing
Perfect
I can't have published you can't have published he can't have published we can't have published you can't have published they can't have published
V-ing perfect
I can't have been publishing you can't have been publishing he can't have been publishing we can't have been publishing you can't have been publishing they can't have been publishing
Interrogative form
Simple form
can I publish? can you publish? can he publish? can we publish? can you publish? can they publish?
V-ing form
can I be publishing? can you be publishing? can he be publishing? can we be publishing? can you be publishing? can they be publishing?
Perfect
can I have published? can you have published? can he have published? can we have published? can you have published? can they have published?
V-ing perfect
can I have been publishing? can you have been publishing? can he have been publishing? can we have been publishing? can you have been publishing? can they have been publishing?
Interro-negative form
Simple form
can't I publish? can't you publish? can't he publish? can't we publish? can't you publish? can't they publish?
V-ing form
can't I be publishing? can't you be publishing? can't he be publishing? can't we be publishing? can't you be publishing? can't they be publishing?
Perfect
can't I have published? can't you have published? can't he have published? can't we have published? can't you have published? can't they have published?
V-ing perfect
can't I have been publishing? can't you have been publishing? can't he have been publishing? can't we have been publishing? can't you have been publishing? can't they have been publishing?