I could cage you could cage she could cage we could cage you could cage they could cage
V-ing form
I could be caging you could be caging she could be caging we could be caging you could be caging they could be caging
Perfect
I could have caged you could have caged she could have caged we could have caged you could have caged they could have caged
V-ing perfect
I could have been caging you could have been caging she could have been caging we could have been caging you could have been caging they could have been caging
Negation
Simple form
I could not cage you could not cage she could not cage we could not cage you could not cage they could not cage
V-ing form
I could not be caging you could not be caging she could not be caging we could not be caging you could not be caging they could not be caging
Perfect
I could not have caged you could not have caged she could not have caged we could not have caged you could not have caged they could not have caged
V-ing perfect
I could not have been caging you could not have been caging she could not have been caging we could not have been caging you could not have been caging they could not have been caging
Interrogative form
Simple form
could I cage? could you cage? could she cage? could we cage? could you cage? could they cage?
V-ing form
could I be caging? could you be caging? could she be caging? could we be caging? could you be caging? could they be caging?
Perfect
could I have caged? could you have caged? could she have caged? could we have caged? could you have caged? could they have caged?
V-ing perfect
could I have been caging? could you have been caging? could she have been caging? could we have been caging? could you have been caging? could they have been caging?
Interro-negative form
Simple form
could I not cage? could you not cage? could she not cage? could we not cage? could you not cage? could they not cage?
V-ing form
could I not be caging? could you not be caging? could she not be caging? could we not be caging? could you not be caging? could they not be caging?
Perfect
could I not have caged? could you not have caged? could she not have caged? could we not have caged? could you not have caged? could they not have caged?
V-ing perfect
could I not have been caging? could you not have been caging? could she not have been caging? could we not have been caging? could you not have been caging? could they not have been caging?