can exercise
Verbo regular: exercise - exercised- exercised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can exercise
you can exercise
he can exercise
we can exercise
you can exercise
they can exercise 	I can be exercising
you can be exercising
he can be exercising
we can be exercising
you can be exercising
they can be exercising	I can have exercised
you can have exercised
he can have exercised
we can have exercised
you can have exercised
they can have exercised	I can have been exercising
you can have been exercising
he can have been exercising
we can have been exercising
you can have been exercising
they can have been exercising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't exercise
you can't exercise
he can't exercise
we can't exercise
you can't exercise
they can't exercise 	I can't be exercising
you can't be exercising
he can't be exercising
we can't be exercising
you can't be exercising
they can't be exercising	I can't have exercised
you can't have exercised
he can't have exercised
we can't have exercised
you can't have exercised
they can't have exercised	I can't have been exercising
you can't have been exercising
he can't have been exercising
we can't have been exercising
you can't have been exercising
they can't have been exercising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I exercise?
can you exercise?
can he exercise?
can we exercise?
can you exercise?
can they exercise? 	can I be exercising?
can you be exercising?
can he be exercising?
can we be exercising?
can you be exercising?
can they be exercising? 	can I have exercised?
can you have exercised?
can he have exercised?
can we have exercised?
can you have exercised?
can they have exercised? 	can I have been exercising?
can you have been exercising?
can he have been exercising?
can we have been exercising?
can you have been exercising?
can they have been exercising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I exercise?
can't you exercise?
can't he exercise?
can't we exercise?
can't you exercise?
can't they exercise? 	can't I be exercising?
can't you be exercising?
can't he be exercising?
can't we be exercising?
can't you be exercising?
can't they be exercising? 	can't I have exercised?
can't you have exercised?
can't he have exercised?
can't we have exercised?
can't you have exercised?
can't they have exercised? 	can't I have been exercising?
can't you have been exercising?
can't he have been exercising?
can't we have been exercising?
can't you have been exercising?
can't they have been exercising?