I can hail you can hail she can hail we can hail you can hail they can hail
V-ing form
I can be hailing you can be hailing she can be hailing we can be hailing you can be hailing they can be hailing
Perfect
I can have hailed you can have hailed she can have hailed we can have hailed you can have hailed they can have hailed
V-ing perfect
I can have been hailing you can have been hailing she can have been hailing we can have been hailing you can have been hailing they can have been hailing
Negation
Simple form
I cannot hail you cannot hail she cannot hail we cannot hail you cannot hail they cannot hail
V-ing form
I cannot be hailing you cannot be hailing she cannot be hailing we cannot be hailing you cannot be hailing they cannot be hailing
Perfect
I cannot have hailed you cannot have hailed she cannot have hailed we cannot have hailed you cannot have hailed they cannot have hailed
V-ing perfect
I cannot have been hailing you cannot have been hailing she cannot have been hailing we cannot have been hailing you cannot have been hailing they cannot have been hailing
Interrogative form
Simple form
can I hail? can you hail? can she hail? can we hail? can you hail? can they hail?
V-ing form
can I be hailing? can you be hailing? can she be hailing? can we be hailing? can you be hailing? can they be hailing?
Perfect
can I have hailed? can you have hailed? can she have hailed? can we have hailed? can you have hailed? can they have hailed?
V-ing perfect
can I have been hailing? can you have been hailing? can she have been hailing? can we have been hailing? can you have been hailing? can they have been hailing?
Interro-negative form
Simple form
can I not hail? can you not hail? can she not hail? can we not hail? can you not hail? can they not hail?
V-ing form
can I not be hailing? can you not be hailing? can she not be hailing? can we not be hailing? can you not be hailing? can they not be hailing?
Perfect
can I not have hailed? can you not have hailed? can she not have hailed? can we not have hailed? can you not have hailed? can they not have hailed?
V-ing perfect
can I not have been hailing? can you not have been hailing? can she not have been hailing? can we not have been hailing? can you not have been hailing? can they not have been hailing?