English verb conjugation
COULD CANKER

Regular verb: canker - cankered - cankered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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