I could badmouth you could badmouth he could badmouth we could badmouth you could badmouth they could badmouth
V-ing form
I could be badmouthing you could be badmouthing he could be badmouthing we could be badmouthing you could be badmouthing they could be badmouthing
Perfect
I could have badmouthed you could have badmouthed he could have badmouthed we could have badmouthed you could have badmouthed they could have badmouthed
V-ing perfect
I could have been badmouthing you could have been badmouthing he could have been badmouthing we could have been badmouthing you could have been badmouthing they could have been badmouthing
Negation
Simple form
I could not badmouth you could not badmouth he could not badmouth we could not badmouth you could not badmouth they could not badmouth
V-ing form
I could not be badmouthing you could not be badmouthing he could not be badmouthing we could not be badmouthing you could not be badmouthing they could not be badmouthing
Perfect
I could not have badmouthed you could not have badmouthed he could not have badmouthed we could not have badmouthed you could not have badmouthed they could not have badmouthed
V-ing perfect
I could not have been badmouthing you could not have been badmouthing he could not have been badmouthing we could not have been badmouthing you could not have been badmouthing they could not have been badmouthing
Interrogative form
Simple form
could I badmouth? could you badmouth? could he badmouth? could we badmouth? could you badmouth? could they badmouth?
V-ing form
could I be badmouthing? could you be badmouthing? could he be badmouthing? could we be badmouthing? could you be badmouthing? could they be badmouthing?
Perfect
could I have badmouthed? could you have badmouthed? could he have badmouthed? could we have badmouthed? could you have badmouthed? could they have badmouthed?
V-ing perfect
could I have been badmouthing? could you have been badmouthing? could he have been badmouthing? could we have been badmouthing? could you have been badmouthing? could they have been badmouthing?
Interro-negative form
Simple form
could I not badmouth? could you not badmouth? could he not badmouth? could we not badmouth? could you not badmouth? could they not badmouth?
V-ing form
could I not be badmouthing? could you not be badmouthing? could he not be badmouthing? could we not be badmouthing? could you not be badmouthing? could they not be badmouthing?
Perfect
could I not have badmouthed? could you not have badmouthed? could he not have badmouthed? could we not have badmouthed? could you not have badmouthed? could they not have badmouthed?
V-ing perfect
could I not have been badmouthing? could you not have been badmouthing? could he not have been badmouthing? could we not have been badmouthing? could you not have been badmouthing? could they not have been badmouthing?