I could commute you could commute he could commute we could commute you could commute they could commute
V-ing form
I could be commuting you could be commuting he could be commuting we could be commuting you could be commuting they could be commuting
Perfect
I could have commuted you could have commuted he could have commuted we could have commuted you could have commuted they could have commuted
V-ing perfect
I could have been commuting you could have been commuting he could have been commuting we could have been commuting you could have been commuting they could have been commuting
Negation
Simple form
I could not commute you could not commute he could not commute we could not commute you could not commute they could not commute
V-ing form
I could not be commuting you could not be commuting he could not be commuting we could not be commuting you could not be commuting they could not be commuting
Perfect
I could not have commuted you could not have commuted he could not have commuted we could not have commuted you could not have commuted they could not have commuted
V-ing perfect
I could not have been commuting you could not have been commuting he could not have been commuting we could not have been commuting you could not have been commuting they could not have been commuting
Interrogative form
Simple form
could I commute? could you commute? could he commute? could we commute? could you commute? could they commute?
V-ing form
could I be commuting? could you be commuting? could he be commuting? could we be commuting? could you be commuting? could they be commuting?
Perfect
could I have commuted? could you have commuted? could he have commuted? could we have commuted? could you have commuted? could they have commuted?
V-ing perfect
could I have been commuting? could you have been commuting? could he have been commuting? could we have been commuting? could you have been commuting? could they have been commuting?
Interro-negative form
Simple form
could I not commute? could you not commute? could he not commute? could we not commute? could you not commute? could they not commute?
V-ing form
could I not be commuting? could you not be commuting? could he not be commuting? could we not be commuting? could you not be commuting? could they not be commuting?
Perfect
could I not have commuted? could you not have commuted? could he not have commuted? could we not have commuted? could you not have commuted? could they not have commuted?
V-ing perfect
could I not have been commuting? could you not have been commuting? could he not have been commuting? could we not have been commuting? could you not have been commuting? could they not have been commuting?