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