I can tell you can tell she can tell we can tell you can tell they can tell
V-ing form
I can be telling you can be telling she can be telling we can be telling you can be telling they can be telling
Perfect
I can have told you can have told she can have told we can have told you can have told they can have told
V-ing perfect
I can have been telling you can have been telling she can have been telling we can have been telling you can have been telling they can have been telling
Negation
Simple form
I cannot tell you cannot tell she cannot tell we cannot tell you cannot tell they cannot tell
V-ing form
I cannot be telling you cannot be telling she cannot be telling we cannot be telling you cannot be telling they cannot be telling
Perfect
I cannot have told you cannot have told she cannot have told we cannot have told you cannot have told they cannot have told
V-ing perfect
I cannot have been telling you cannot have been telling she cannot have been telling we cannot have been telling you cannot have been telling they cannot have been telling
Interrogative form
Simple form
can I tell? can you tell? can she tell? can we tell? can you tell? can they tell?
V-ing form
can I be telling? can you be telling? can she be telling? can we be telling? can you be telling? can they be telling?
Perfect
can I have told? can you have told? can she have told? can we have told? can you have told? can they have told?
V-ing perfect
can I have been telling? can you have been telling? can she have been telling? can we have been telling? can you have been telling? can they have been telling?
Interro-negative form
Simple form
can I not tell? can you not tell? can she not tell? can we not tell? can you not tell? can they not tell?
V-ing form
can I not be telling? can you not be telling? can she not be telling? can we not be telling? can you not be telling? can they not be telling?
Perfect
can I not have told? can you not have told? can she not have told? can we not have told? can you not have told? can they not have told?
V-ing perfect
can I not have been telling? can you not have been telling? can she not have been telling? can we not have been telling? can you not have been telling? can they not have been telling?