I can canker you can canker she can canker we can canker you can canker they can canker
V-ing form
I can be cankering you can be cankering she can be cankering we can be cankering you can be cankering they can be cankering
Perfect
I can have cankered you can have cankered she can have cankered we can have cankered you can have cankered they can have cankered
V-ing perfect
I can have been cankering you can have been cankering she can have been cankering we can have been cankering you can have been cankering they can have been cankering
Negation
Simple form
I cannot canker you cannot canker she cannot canker we cannot canker you cannot canker they cannot canker
V-ing form
I cannot be cankering you cannot be cankering she cannot be cankering we cannot be cankering you cannot be cankering they cannot be cankering
Perfect
I cannot have cankered you cannot have cankered she cannot have cankered we cannot have cankered you cannot have cankered they cannot have cankered
V-ing perfect
I cannot have been cankering you cannot have been cankering she cannot have been cankering we cannot have been cankering you cannot have been cankering they cannot have been cankering
Interrogative form
Simple form
can I canker? can you canker? can she canker? can we canker? can you canker? can they canker?
V-ing form
can I be cankering? can you be cankering? can she be cankering? can we be cankering? can you be cankering? can they be cankering?
Perfect
can I have cankered? can you have cankered? can she have cankered? can we have cankered? can you have cankered? can they have cankered?
V-ing perfect
can I have been cankering? can you have been cankering? can she have been cankering? can we have been cankering? can you have been cankering? can they have been cankering?
Interro-negative form
Simple form
can I not canker? can you not canker? can she not canker? can we not canker? can you not canker? can they not canker?
V-ing form
can I not be cankering? can you not be cankering? can she not be cankering? can we not be cankering? can you not be cankering? can they not be cankering?
Perfect
can I not have cankered? can you not have cankered? can she not have cankered? can we not have cankered? can you not have cankered? can they not have cankered?
V-ing perfect
can I not have been cankering? can you not have been cankering? can she not have been cankering? can we not have been cankering? can you not have been cankering? can they not have been cankering?