could jog
Regular verb: jog - jogged- jogged

Affirmation 	
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I could jog
you could jog
he could jog
we could jog
you could jog
they could jog 	I could be jogging
you could be jogging
he could be jogging
we could be jogging
you could be jogging
they could be jogging	I could have jogged
you could have jogged
he could have jogged
we could have jogged
you could have jogged
they could have jogged	I could have been jogging
you could have been jogging
he could have been jogging
we could have been jogging
you could have been jogging
they could have been jogging	

Negation 	
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I couldn't jog
you couldn't jog
he couldn't jog
we couldn't jog
you couldn't jog
they couldn't jog 	I couldn't be jogging
you couldn't be jogging
he couldn't be jogging
we couldn't be jogging
you couldn't be jogging
they couldn't be jogging	I couldn't have jogged
you couldn't have jogged
he couldn't have jogged
we couldn't have jogged
you couldn't have jogged
they couldn't have jogged	I couldn't have been jogging
you couldn't have been jogging
he couldn't have been jogging
we couldn't have been jogging
you couldn't have been jogging
they couldn't have been jogging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I jog?
could you jog?
could he jog?
could we jog?
could you jog?
could they jog? 	could I be jogging?
could you be jogging?
could he be jogging?
could we be jogging?
could you be jogging?
could they be jogging? 	could I have jogged?
could you have jogged?
could he have jogged?
could we have jogged?
could you have jogged?
could they have jogged? 	could I have been jogging?
could you have been jogging?
could he have been jogging?
could we have been jogging?
could you have been jogging?
could they have been jogging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I jog?
couldn't you jog?
couldn't he jog?
couldn't we jog?
couldn't you jog?
couldn't they jog? 	couldn't I be jogging?
couldn't you be jogging?
couldn't he be jogging?
couldn't we be jogging?
couldn't you be jogging?
couldn't they be jogging? 	couldn't I have jogged?
couldn't you have jogged?
couldn't he have jogged?
couldn't we have jogged?
couldn't you have jogged?
couldn't they have jogged? 	couldn't I have been jogging?
couldn't you have been jogging?
couldn't he have been jogging?
couldn't we have been jogging?
couldn't you have been jogging?
couldn't they have been jogging?