I could ax you could ax she could ax we could ax you could ax they could ax
V-ing form
I could be axing you could be axing she could be axing we could be axing you could be axing they could be axing
Perfect
I could have axed you could have axed she could have axed we could have axed you could have axed they could have axed
V-ing perfect
I could have been axing you could have been axing she could have been axing we could have been axing you could have been axing they could have been axing
Negation
Simple form
I could not ax you could not ax she could not ax we could not ax you could not ax they could not ax
V-ing form
I could not be axing you could not be axing she could not be axing we could not be axing you could not be axing they could not be axing
Perfect
I could not have axed you could not have axed she could not have axed we could not have axed you could not have axed they could not have axed
V-ing perfect
I could not have been axing you could not have been axing she could not have been axing we could not have been axing you could not have been axing they could not have been axing
Interrogative form
Simple form
could I ax? could you ax? could she ax? could we ax? could you ax? could they ax?
V-ing form
could I be axing? could you be axing? could she be axing? could we be axing? could you be axing? could they be axing?
Perfect
could I have axed? could you have axed? could she have axed? could we have axed? could you have axed? could they have axed?
V-ing perfect
could I have been axing? could you have been axing? could she have been axing? could we have been axing? could you have been axing? could they have been axing?
Interro-negative form
Simple form
could I not ax? could you not ax? could she not ax? could we not ax? could you not ax? could they not ax?
V-ing form
could I not be axing? could you not be axing? could she not be axing? could we not be axing? could you not be axing? could they not be axing?
Perfect
could I not have axed? could you not have axed? could she not have axed? could we not have axed? could you not have axed? could they not have axed?
V-ing perfect
could I not have been axing? could you not have been axing? could she not have been axing? could we not have been axing? could you not have been axing? could they not have been axing?