can canker
Regular verb: canker - cankered- cankered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can canker
you can canker
he can canker
we can canker
you can canker
they can canker 	I can be cankering
you can be cankering
he can be cankering
we can be cankering
you can be cankering
they can be cankering	I can have cankered
you can have cankered
he can have cankered
we can have cankered
you can have cankered
they can have cankered	I can have been cankering
you can have been cankering
he can have been cankering
we can have been cankering
you can have been cankering
they can have been cankering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't canker
you can't canker
he can't canker
we can't canker
you can't canker
they can't canker 	I can't be cankering
you can't be cankering
he can't be cankering
we can't be cankering
you can't be cankering
they can't be cankering	I can't have cankered
you can't have cankered
he can't have cankered
we can't have cankered
you can't have cankered
they can't have cankered	I can't have been cankering
you can't have been cankering
he can't have been cankering
we can't have been cankering
you can't have been cankering
they can't have been cankering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I canker?
can you canker?
can he canker?
can we canker?
can you canker?
can they canker? 	can I be cankering?
can you be cankering?
can he be cankering?
can we be cankering?
can you be cankering?
can they be cankering? 	can I have cankered?
can you have cankered?
can he have cankered?
can we have cankered?
can you have cankered?
can they have cankered? 	can I have been cankering?
can you have been cankering?
can he have been cankering?
can we have been cankering?
can you have been cankering?
can they have been cankering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I canker?
can't you canker?
can't he canker?
can't we canker?
can't you canker?
can't they canker? 	can't I be cankering?
can't you be cankering?
can't he be cankering?
can't we be cankering?
can't you be cankering?
can't they be cankering? 	can't I have cankered?
can't you have cankered?
can't he have cankered?
can't we have cankered?
can't you have cankered?
can't they have cankered? 	can't I have been cankering?
can't you have been cankering?
can't he have been cankering?
can't we have been cankering?
can't you have been cankering?
can't they have been cankering?