English verb conjugation
COULD COX

Regular verb: cox - coxed - coxed

Affirmation

Simple form	V-ing form
I could cox you could cox he could cox we could cox you could cox they could cox	I could be coxing you could be coxing he could be coxing we could be coxing you could be coxing they could be coxing
Perfect	V-ing perfect
I could have coxed you could have coxed he could have coxed we could have coxed you could have coxed they could have coxed	I could have been coxing you could have been coxing he could have been coxing we could have been coxing you could have been coxing they could have been coxing

Negation

Simple form	V-ing form
I couldn't cox you couldn't cox he couldn't cox we couldn't cox you couldn't cox they couldn't cox	I couldn't be coxing you couldn't be coxing he couldn't be coxing we couldn't be coxing you couldn't be coxing they couldn't be coxing
Perfect	V-ing perfect
I couldn't have coxed you couldn't have coxed he couldn't have coxed we couldn't have coxed you couldn't have coxed they couldn't have coxed	I couldn't have been coxing you couldn't have been coxing he couldn't have been coxing we couldn't have been coxing you couldn't have been coxing they couldn't have been coxing

Interrogative form

Simple form	V-ing form
could I cox? could you cox? could he cox? could we cox? could you cox? could they cox?	could I be coxing? could you be coxing? could he be coxing? could we be coxing? could you be coxing? could they be coxing?
Perfect	V-ing perfect
could I have coxed? could you have coxed? could he have coxed? could we have coxed? could you have coxed? could they have coxed?	could I have been coxing? could you have been coxing? could he have been coxing? could we have been coxing? could you have been coxing? could they have been coxing?

Interro-negative form

Simple form	V-ing form
couldn't I cox? couldn't you cox? couldn't he cox? couldn't we cox? couldn't you cox? couldn't they cox?	couldn't I be coxing? couldn't you be coxing? couldn't he be coxing? couldn't we be coxing? couldn't you be coxing? couldn't they be coxing?
Perfect	V-ing perfect
couldn't I have coxed? couldn't you have coxed? couldn't he have coxed? couldn't we have coxed? couldn't you have coxed? couldn't they have coxed?	couldn't I have been coxing? couldn't you have been coxing? couldn't he have been coxing? couldn't we have been coxing? couldn't you have been coxing? couldn't they have been coxing?