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