I could double-park you could double-park he could double-park we could double-park you could double-park they could double-park
V-ing form
I could be double-parking you could be double-parking he could be double-parking we could be double-parking you could be double-parking they could be double-parking
Perfect
I could have double-parked you could have double-parked he could have double-parked we could have double-parked you could have double-parked they could have double-parked
V-ing perfect
I could have been double-parking you could have been double-parking he could have been double-parking we could have been double-parking you could have been double-parking they could have been double-parking
Negation
Simple form
I couldn't double-park you couldn't double-park he couldn't double-park we couldn't double-park you couldn't double-park they couldn't double-park
V-ing form
I couldn't be double-parking you couldn't be double-parking he couldn't be double-parking we couldn't be double-parking you couldn't be double-parking they couldn't be double-parking
Perfect
I couldn't have double-parked you couldn't have double-parked he couldn't have double-parked we couldn't have double-parked you couldn't have double-parked they couldn't have double-parked
V-ing perfect
I couldn't have been double-parking you couldn't have been double-parking he couldn't have been double-parking we couldn't have been double-parking you couldn't have been double-parking they couldn't have been double-parking
Interrogative form
Simple form
could I double-park? could you double-park? could he double-park? could we double-park? could you double-park? could they double-park?
V-ing form
could I be double-parking? could you be double-parking? could he be double-parking? could we be double-parking? could you be double-parking? could they be double-parking?
Perfect
could I have double-parked? could you have double-parked? could he have double-parked? could we have double-parked? could you have double-parked? could they have double-parked?
V-ing perfect
could I have been double-parking? could you have been double-parking? could he have been double-parking? could we have been double-parking? could you have been double-parking? could they have been double-parking?
Interro-negative form
Simple form
couldn't I double-park? couldn't you double-park? couldn't he double-park? couldn't we double-park? couldn't you double-park? couldn't they double-park?
V-ing form
couldn't I be double-parking? couldn't you be double-parking? couldn't he be double-parking? couldn't we be double-parking? couldn't you be double-parking? couldn't they be double-parking?
Perfect
couldn't I have double-parked? couldn't you have double-parked? couldn't he have double-parked? couldn't we have double-parked? couldn't you have double-parked? couldn't they have double-parked?
V-ing perfect
couldn't I have been double-parking? couldn't you have been double-parking? couldn't he have been double-parking? couldn't we have been double-parking? couldn't you have been double-parking? couldn't they have been double-parking?