I can display you can display he can display we can display you can display they can display
V-ing form
I can be displaying you can be displaying he can be displaying we can be displaying you can be displaying they can be displaying
Perfect
I can have displayed you can have displayed he can have displayed we can have displayed you can have displayed they can have displayed
V-ing perfect
I can have been displaying you can have been displaying he can have been displaying we can have been displaying you can have been displaying they can have been displaying
Negation
Simple form
I cannot display you cannot display he cannot display we cannot display you cannot display they cannot display
V-ing form
I cannot be displaying you cannot be displaying he cannot be displaying we cannot be displaying you cannot be displaying they cannot be displaying
Perfect
I cannot have displayed you cannot have displayed he cannot have displayed we cannot have displayed you cannot have displayed they cannot have displayed
V-ing perfect
I cannot have been displaying you cannot have been displaying he cannot have been displaying we cannot have been displaying you cannot have been displaying they cannot have been displaying
Interrogative form
Simple form
can I display? can you display? can he display? can we display? can you display? can they display?
V-ing form
can I be displaying? can you be displaying? can he be displaying? can we be displaying? can you be displaying? can they be displaying?
Perfect
can I have displayed? can you have displayed? can he have displayed? can we have displayed? can you have displayed? can they have displayed?
V-ing perfect
can I have been displaying? can you have been displaying? can he have been displaying? can we have been displaying? can you have been displaying? can they have been displaying?
Interro-negative form
Simple form
can I not display? can you not display? can he not display? can we not display? can you not display? can they not display?
V-ing form
can I not be displaying? can you not be displaying? can he not be displaying? can we not be displaying? can you not be displaying? can they not be displaying?
Perfect
can I not have displayed? can you not have displayed? can he not have displayed? can we not have displayed? can you not have displayed? can they not have displayed?
V-ing perfect
can I not have been displaying? can you not have been displaying? can he not have been displaying? can we not have been displaying? can you not have been displaying? can they not have been displaying?