I could wiggle you could wiggle he could wiggle we could wiggle you could wiggle they could wiggle
V-ing form
I could be wiggling you could be wiggling he could be wiggling we could be wiggling you could be wiggling they could be wiggling
Perfect
I could have wiggled you could have wiggled he could have wiggled we could have wiggled you could have wiggled they could have wiggled
V-ing perfect
I could have been wiggling you could have been wiggling he could have been wiggling we could have been wiggling you could have been wiggling they could have been wiggling
Negation
Simple form
I couldn't wiggle you couldn't wiggle he couldn't wiggle we couldn't wiggle you couldn't wiggle they couldn't wiggle
V-ing form
I couldn't be wiggling you couldn't be wiggling he couldn't be wiggling we couldn't be wiggling you couldn't be wiggling they couldn't be wiggling
Perfect
I couldn't have wiggled you couldn't have wiggled he couldn't have wiggled we couldn't have wiggled you couldn't have wiggled they couldn't have wiggled
V-ing perfect
I couldn't have been wiggling you couldn't have been wiggling he couldn't have been wiggling we couldn't have been wiggling you couldn't have been wiggling they couldn't have been wiggling
Interrogative form
Simple form
could I wiggle? could you wiggle? could he wiggle? could we wiggle? could you wiggle? could they wiggle?
V-ing form
could I be wiggling? could you be wiggling? could he be wiggling? could we be wiggling? could you be wiggling? could they be wiggling?
Perfect
could I have wiggled? could you have wiggled? could he have wiggled? could we have wiggled? could you have wiggled? could they have wiggled?
V-ing perfect
could I have been wiggling? could you have been wiggling? could he have been wiggling? could we have been wiggling? could you have been wiggling? could they have been wiggling?
Interro-negative form
Simple form
couldn't I wiggle? couldn't you wiggle? couldn't he wiggle? couldn't we wiggle? couldn't you wiggle? couldn't they wiggle?
V-ing form
couldn't I be wiggling? couldn't you be wiggling? couldn't he be wiggling? couldn't we be wiggling? couldn't you be wiggling? couldn't they be wiggling?
Perfect
couldn't I have wiggled? couldn't you have wiggled? couldn't he have wiggled? couldn't we have wiggled? couldn't you have wiggled? couldn't they have wiggled?
V-ing perfect
couldn't I have been wiggling? couldn't you have been wiggling? couldn't he have been wiggling? couldn't we have been wiggling? couldn't you have been wiggling? couldn't they have been wiggling?