I could throat you could throat he could throat we could throat you could throat they could throat
V-ing form
I could be throating you could be throating he could be throating we could be throating you could be throating they could be throating
Perfect
I could have throated you could have throated he could have throated we could have throated you could have throated they could have throated
V-ing perfect
I could have been throating you could have been throating he could have been throating we could have been throating you could have been throating they could have been throating
Negation
Simple form
I could not throat you could not throat he could not throat we could not throat you could not throat they could not throat
V-ing form
I could not be throating you could not be throating he could not be throating we could not be throating you could not be throating they could not be throating
Perfect
I could not have throated you could not have throated he could not have throated we could not have throated you could not have throated they could not have throated
V-ing perfect
I could not have been throating you could not have been throating he could not have been throating we could not have been throating you could not have been throating they could not have been throating
Interrogative form
Simple form
could I throat? could you throat? could he throat? could we throat? could you throat? could they throat?
V-ing form
could I be throating? could you be throating? could he be throating? could we be throating? could you be throating? could they be throating?
Perfect
could I have throated? could you have throated? could he have throated? could we have throated? could you have throated? could they have throated?
V-ing perfect
could I have been throating? could you have been throating? could he have been throating? could we have been throating? could you have been throating? could they have been throating?
Interro-negative form
Simple form
could I not throat? could you not throat? could he not throat? could we not throat? could you not throat? could they not throat?
V-ing form
could I not be throating? could you not be throating? could he not be throating? could we not be throating? could you not be throating? could they not be throating?
Perfect
could I not have throated? could you not have throated? could he not have throated? could we not have throated? could you not have throated? could they not have throated?
V-ing perfect
could I not have been throating? could you not have been throating? could he not have been throating? could we not have been throating? could you not have been throating? could they not have been throating?