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