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 couldn't throat you couldn't throat he couldn't throat we couldn't throat you couldn't throat they couldn't throat
V-ing form
I couldn't be throating you couldn't be throating he couldn't be throating we couldn't be throating you couldn't be throating they couldn't be throating
Perfect
I couldn't have throated you couldn't have throated he couldn't have throated we couldn't have throated you couldn't have throated they couldn't have throated
V-ing perfect
I couldn't have been throating you couldn't have been throating he couldn't have been throating we couldn't have been throating you couldn't have been throating they couldn't 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
couldn't I throat? couldn't you throat? couldn't he throat? couldn't we throat? couldn't you throat? couldn't they throat?
V-ing form
couldn't I be throating? couldn't you be throating? couldn't he be throating? couldn't we be throating? couldn't you be throating? couldn't they be throating?
Perfect
couldn't I have throated? couldn't you have throated? couldn't he have throated? couldn't we have throated? couldn't you have throated? couldn't they have throated?
V-ing perfect
couldn't I have been throating? couldn't you have been throating? couldn't he have been throating? couldn't we have been throating? couldn't you have been throating? couldn't they have been throating?