I could kennel you could kennel he could kennel we could kennel you could kennel they could kennel
V-ing form
I could be kenneling you could be kenneling he could be kenneling we could be kenneling you could be kenneling they could be kenneling
Perfect
I could have kenneled you could have kenneled he could have kenneled we could have kenneled you could have kenneled they could have kenneled
V-ing perfect
I could have been kenneling you could have been kenneling he could have been kenneling we could have been kenneling you could have been kenneling they could have been kenneling
Negation
Simple form
I could not kennel you could not kennel he could not kennel we could not kennel you could not kennel they could not kennel
V-ing form
I could not be kenneling you could not be kenneling he could not be kenneling we could not be kenneling you could not be kenneling they could not be kenneling
Perfect
I could not have kenneled you could not have kenneled he could not have kenneled we could not have kenneled you could not have kenneled they could not have kenneled
V-ing perfect
I could not have been kenneling you could not have been kenneling he could not have been kenneling we could not have been kenneling you could not have been kenneling they could not have been kenneling
Interrogative form
Simple form
could I kennel? could you kennel? could he kennel? could we kennel? could you kennel? could they kennel?
V-ing form
could I be kenneling? could you be kenneling? could he be kenneling? could we be kenneling? could you be kenneling? could they be kenneling?
Perfect
could I have kenneled? could you have kenneled? could he have kenneled? could we have kenneled? could you have kenneled? could they have kenneled?
V-ing perfect
could I have been kenneling? could you have been kenneling? could he have been kenneling? could we have been kenneling? could you have been kenneling? could they have been kenneling?
Interro-negative form
Simple form
could I not kennel? could you not kennel? could he not kennel? could we not kennel? could you not kennel? could they not kennel?
V-ing form
could I not be kenneling? could you not be kenneling? could he not be kenneling? could we not be kenneling? could you not be kenneling? could they not be kenneling?
Perfect
could I not have kenneled? could you not have kenneled? could he not have kenneled? could we not have kenneled? could you not have kenneled? could they not have kenneled?
V-ing perfect
could I not have been kenneling? could you not have been kenneling? could he not have been kenneling? could we not have been kenneling? could you not have been kenneling? could they not have been kenneling?