I could water-wave you could water-wave he could water-wave we could water-wave you could water-wave they could water-wave
V-ing form
I could be water-waving you could be water-waving he could be water-waving we could be water-waving you could be water-waving they could be water-waving
Perfect
I could have water-waved you could have water-waved he could have water-waved we could have water-waved you could have water-waved they could have water-waved
V-ing perfect
I could have been water-waving you could have been water-waving he could have been water-waving we could have been water-waving you could have been water-waving they could have been water-waving
Negation
Simple form
I couldn't water-wave you couldn't water-wave he couldn't water-wave we couldn't water-wave you couldn't water-wave they couldn't water-wave
V-ing form
I couldn't be water-waving you couldn't be water-waving he couldn't be water-waving we couldn't be water-waving you couldn't be water-waving they couldn't be water-waving
Perfect
I couldn't have water-waved you couldn't have water-waved he couldn't have water-waved we couldn't have water-waved you couldn't have water-waved they couldn't have water-waved
V-ing perfect
I couldn't have been water-waving you couldn't have been water-waving he couldn't have been water-waving we couldn't have been water-waving you couldn't have been water-waving they couldn't have been water-waving
Interrogative form
Simple form
could I water-wave? could you water-wave? could he water-wave? could we water-wave? could you water-wave? could they water-wave?
V-ing form
could I be water-waving? could you be water-waving? could he be water-waving? could we be water-waving? could you be water-waving? could they be water-waving?
Perfect
could I have water-waved? could you have water-waved? could he have water-waved? could we have water-waved? could you have water-waved? could they have water-waved?
V-ing perfect
could I have been water-waving? could you have been water-waving? could he have been water-waving? could we have been water-waving? could you have been water-waving? could they have been water-waving?
Interro-negative form
Simple form
couldn't I water-wave? couldn't you water-wave? couldn't he water-wave? couldn't we water-wave? couldn't you water-wave? couldn't they water-wave?
V-ing form
couldn't I be water-waving? couldn't you be water-waving? couldn't he be water-waving? couldn't we be water-waving? couldn't you be water-waving? couldn't they be water-waving?
Perfect
couldn't I have water-waved? couldn't you have water-waved? couldn't he have water-waved? couldn't we have water-waved? couldn't you have water-waved? couldn't they have water-waved?
V-ing perfect
couldn't I have been water-waving? couldn't you have been water-waving? couldn't he have been water-waving? couldn't we have been water-waving? couldn't you have been water-waving? couldn't they have been water-waving?