I could backhand you could backhand she could backhand we could backhand you could backhand they could backhand
V-ing form
I could be backhanding you could be backhanding she could be backhanding we could be backhanding you could be backhanding they could be backhanding
Perfect
I could have backhanded you could have backhanded she 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 she 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 she 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 she 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 she 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 she 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 she backhand? could we backhand? could you backhand? could they backhand?
V-ing form
could I be backhanding? could you be backhanding? could she be backhanding? could we be backhanding? could you be backhanding? could they be backhanding?
Perfect
could I have backhanded? could you have backhanded? could she 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 she 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 she 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 she 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 she 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 she have been backhanding? couldn't we have been backhanding? couldn't you have been backhanding? couldn't they have been backhanding?