could exercise
Regular verb: exercise - exercised- exercised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could exercise
you could exercise
he could exercise
we could exercise
you could exercise
they could exercise 	I could be exercising
you could be exercising
he could be exercising
we could be exercising
you could be exercising
they could be exercising	I could have exercised
you could have exercised
he could have exercised
we could have exercised
you could have exercised
they could have exercised	I could have been exercising
you could have been exercising
he could have been exercising
we could have been exercising
you could have been exercising
they could have been exercising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not exercise
you could not exercise
he could not exercise
we could not exercise
you could not exercise
they could not exercise 	I could not be exercising
you could not be exercising
he could not be exercising
we could not be exercising
you could not be exercising
they could not be exercising	I could not have exercised
you could not have exercised
he could not have exercised
we could not have exercised
you could not have exercised
they could not have exercised	I could not have been exercising
you could not have been exercising
he could not have been exercising
we could not have been exercising
you could not have been exercising
they could not have been exercising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I exercise?
could you exercise?
could he exercise?
could we exercise?
could you exercise?
could they exercise? 	could I be exercising?
could you be exercising?
could he be exercising?
could we be exercising?
could you be exercising?
could they be exercising? 	could I have exercised?
could you have exercised?
could he have exercised?
could we have exercised?
could you have exercised?
could they have exercised? 	could I have been exercising?
could you have been exercising?
could he have been exercising?
could we have been exercising?
could you have been exercising?
could they have been exercising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not exercise?
could you not exercise?
could he not exercise?
could we not exercise?
could you not exercise?
could they not exercise? 	could I not be exercising?
could you not be exercising?
could he not be exercising?
could we not be exercising?
could you not be exercising?
could they not be exercising? 	could I not have exercised?
could you not have exercised?
could he not have exercised?
could we not have exercised?
could you not have exercised?
could they not have exercised? 	could I not have been exercising?
could you not have been exercising?
could he not have been exercising?
could we not have been exercising?
could you not have been exercising?
could they not have been exercising?