I could countermand you could countermand she could countermand we could countermand you could countermand they could countermand
V-ing form
I could be countermanding you could be countermanding she could be countermanding we could be countermanding you could be countermanding they could be countermanding
Perfect
I could have countermanded you could have countermanded she could have countermanded we could have countermanded you could have countermanded they could have countermanded
V-ing perfect
I could have been countermanding you could have been countermanding she could have been countermanding we could have been countermanding you could have been countermanding they could have been countermanding
Negation
Simple form
I couldn't countermand you couldn't countermand she couldn't countermand we couldn't countermand you couldn't countermand they couldn't countermand
V-ing form
I couldn't be countermanding you couldn't be countermanding she couldn't be countermanding we couldn't be countermanding you couldn't be countermanding they couldn't be countermanding
Perfect
I couldn't have countermanded you couldn't have countermanded she couldn't have countermanded we couldn't have countermanded you couldn't have countermanded they couldn't have countermanded
V-ing perfect
I couldn't have been countermanding you couldn't have been countermanding she couldn't have been countermanding we couldn't have been countermanding you couldn't have been countermanding they couldn't have been countermanding
Interrogative form
Simple form
could I countermand? could you countermand? could she countermand? could we countermand? could you countermand? could they countermand?
V-ing form
could I be countermanding? could you be countermanding? could she be countermanding? could we be countermanding? could you be countermanding? could they be countermanding?
Perfect
could I have countermanded? could you have countermanded? could she have countermanded? could we have countermanded? could you have countermanded? could they have countermanded?
V-ing perfect
could I have been countermanding? could you have been countermanding? could she have been countermanding? could we have been countermanding? could you have been countermanding? could they have been countermanding?
Interro-negative form
Simple form
couldn't I countermand? couldn't you countermand? couldn't she countermand? couldn't we countermand? couldn't you countermand? couldn't they countermand?
V-ing form
couldn't I be countermanding? couldn't you be countermanding? couldn't she be countermanding? couldn't we be countermanding? couldn't you be countermanding? couldn't they be countermanding?
Perfect
couldn't I have countermanded? couldn't you have countermanded? couldn't she have countermanded? couldn't we have countermanded? couldn't you have countermanded? couldn't they have countermanded?
V-ing perfect
couldn't I have been countermanding? couldn't you have been countermanding? couldn't she have been countermanding? couldn't we have been countermanding? couldn't you have been countermanding? couldn't they have been countermanding?