I could jog you could jog she could jog we could jog you could jog they could jog
V-ing form
I could be jogging you could be jogging she could be jogging we could be jogging you could be jogging they could be jogging
Perfect
I could have jogged you could have jogged she could have jogged we could have jogged you could have jogged they could have jogged
V-ing perfect
I could have been jogging you could have been jogging she could have been jogging we could have been jogging you could have been jogging they could have been jogging
Negation
Simple form
I could not jog you could not jog she could not jog we could not jog you could not jog they could not jog
V-ing form
I could not be jogging you could not be jogging she could not be jogging we could not be jogging you could not be jogging they could not be jogging
Perfect
I could not have jogged you could not have jogged she could not have jogged we could not have jogged you could not have jogged they could not have jogged
V-ing perfect
I could not have been jogging you could not have been jogging she could not have been jogging we could not have been jogging you could not have been jogging they could not have been jogging
Interrogative form
Simple form
could I jog? could you jog? could she jog? could we jog? could you jog? could they jog?
V-ing form
could I be jogging? could you be jogging? could she be jogging? could we be jogging? could you be jogging? could they be jogging?
Perfect
could I have jogged? could you have jogged? could she have jogged? could we have jogged? could you have jogged? could they have jogged?
V-ing perfect
could I have been jogging? could you have been jogging? could she have been jogging? could we have been jogging? could you have been jogging? could they have been jogging?
Interro-negative form
Simple form
could I not jog? could you not jog? could she not jog? could we not jog? could you not jog? could they not jog?
V-ing form
could I not be jogging? could you not be jogging? could she not be jogging? could we not be jogging? could you not be jogging? could they not be jogging?
Perfect
could I not have jogged? could you not have jogged? could she not have jogged? could we not have jogged? could you not have jogged? could they not have jogged?
V-ing perfect
could I not have been jogging? could you not have been jogging? could she not have been jogging? could we not have been jogging? could you not have been jogging? could they not have been jogging?