I could devour you could devour she could devour we could devour you could devour they could devour
V-ing form
I could be devouring you could be devouring she could be devouring we could be devouring you could be devouring they could be devouring
Perfect
I could have devoured you could have devoured she could have devoured we could have devoured you could have devoured they could have devoured
V-ing perfect
I could have been devouring you could have been devouring she could have been devouring we could have been devouring you could have been devouring they could have been devouring
Negation
Simple form
I could not devour you could not devour she could not devour we could not devour you could not devour they could not devour
V-ing form
I could not be devouring you could not be devouring she could not be devouring we could not be devouring you could not be devouring they could not be devouring
Perfect
I could not have devoured you could not have devoured she could not have devoured we could not have devoured you could not have devoured they could not have devoured
V-ing perfect
I could not have been devouring you could not have been devouring she could not have been devouring we could not have been devouring you could not have been devouring they could not have been devouring
Interrogative form
Simple form
could I devour? could you devour? could she devour? could we devour? could you devour? could they devour?
V-ing form
could I be devouring? could you be devouring? could she be devouring? could we be devouring? could you be devouring? could they be devouring?
Perfect
could I have devoured? could you have devoured? could she have devoured? could we have devoured? could you have devoured? could they have devoured?
V-ing perfect
could I have been devouring? could you have been devouring? could she have been devouring? could we have been devouring? could you have been devouring? could they have been devouring?
Interro-negative form
Simple form
could I not devour? could you not devour? could she not devour? could we not devour? could you not devour? could they not devour?
V-ing form
could I not be devouring? could you not be devouring? could she not be devouring? could we not be devouring? could you not be devouring? could they not be devouring?
Perfect
could I not have devoured? could you not have devoured? could she not have devoured? could we not have devoured? could you not have devoured? could they not have devoured?
V-ing perfect
could I not have been devouring? could you not have been devouring? could she not have been devouring? could we not have been devouring? could you not have been devouring? could they not have been devouring?