I can profess you can profess she can profess we can profess you can profess they can profess
V-ing form
I can be professing you can be professing she can be professing we can be professing you can be professing they can be professing
Perfect
I can have professed you can have professed she can have professed we can have professed you can have professed they can have professed
V-ing perfect
I can have been professing you can have been professing she can have been professing we can have been professing you can have been professing they can have been professing
Negation
Simple form
I cannot profess you cannot profess she cannot profess we cannot profess you cannot profess they cannot profess
V-ing form
I cannot be professing you cannot be professing she cannot be professing we cannot be professing you cannot be professing they cannot be professing
Perfect
I cannot have professed you cannot have professed she cannot have professed we cannot have professed you cannot have professed they cannot have professed
V-ing perfect
I cannot have been professing you cannot have been professing she cannot have been professing we cannot have been professing you cannot have been professing they cannot have been professing
Interrogative form
Simple form
can I profess? can you profess? can she profess? can we profess? can you profess? can they profess?
V-ing form
can I be professing? can you be professing? can she be professing? can we be professing? can you be professing? can they be professing?
Perfect
can I have professed? can you have professed? can she have professed? can we have professed? can you have professed? can they have professed?
V-ing perfect
can I have been professing? can you have been professing? can she have been professing? can we have been professing? can you have been professing? can they have been professing?
Interro-negative form
Simple form
can I not profess? can you not profess? can she not profess? can we not profess? can you not profess? can they not profess?
V-ing form
can I not be professing? can you not be professing? can she not be professing? can we not be professing? can you not be professing? can they not be professing?
Perfect
can I not have professed? can you not have professed? can she not have professed? can we not have professed? can you not have professed? can they not have professed?
V-ing perfect
can I not have been professing? can you not have been professing? can she not have been professing? can we not have been professing? can you not have been professing? can they not have been professing?