could margin
Verbo regular: margin - margined- margined

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could margin
you could margin
he could margin
we could margin
you could margin
they could margin 	I could be margining
you could be margining
he could be margining
we could be margining
you could be margining
they could be margining	I could have margined
you could have margined
he could have margined
we could have margined
you could have margined
they could have margined	I could have been margining
you could have been margining
he could have been margining
we could have been margining
you could have been margining
they could have been margining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't margin
you couldn't margin
he couldn't margin
we couldn't margin
you couldn't margin
they couldn't margin 	I couldn't be margining
you couldn't be margining
he couldn't be margining
we couldn't be margining
you couldn't be margining
they couldn't be margining	I couldn't have margined
you couldn't have margined
he couldn't have margined
we couldn't have margined
you couldn't have margined
they couldn't have margined	I couldn't have been margining
you couldn't have been margining
he couldn't have been margining
we couldn't have been margining
you couldn't have been margining
they couldn't have been margining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I margin?
could you margin?
could he margin?
could we margin?
could you margin?
could they margin? 	could I be margining?
could you be margining?
could he be margining?
could we be margining?
could you be margining?
could they be margining? 	could I have margined?
could you have margined?
could he have margined?
could we have margined?
could you have margined?
could they have margined? 	could I have been margining?
could you have been margining?
could he have been margining?
could we have been margining?
could you have been margining?
could they have been margining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I margin?
couldn't you margin?
couldn't he margin?
couldn't we margin?
couldn't you margin?
couldn't they margin? 	couldn't I be margining?
couldn't you be margining?
couldn't he be margining?
couldn't we be margining?
couldn't you be margining?
couldn't they be margining? 	couldn't I have margined?
couldn't you have margined?
couldn't he have margined?
couldn't we have margined?
couldn't you have margined?
couldn't they have margined? 	couldn't I have been margining?
couldn't you have been margining?
couldn't he have been margining?
couldn't we have been margining?
couldn't you have been margining?
couldn't they have been margining?