could mill
Verbo regular: mill - milled- milled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could mill
you could mill
he could mill
we could mill
you could mill
they could mill 	I could be milling
you could be milling
he could be milling
we could be milling
you could be milling
they could be milling	I could have milled
you could have milled
he could have milled
we could have milled
you could have milled
they could have milled	I could have been milling
you could have been milling
he could have been milling
we could have been milling
you could have been milling
they could have been milling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't mill
you couldn't mill
he couldn't mill
we couldn't mill
you couldn't mill
they couldn't mill 	I couldn't be milling
you couldn't be milling
he couldn't be milling
we couldn't be milling
you couldn't be milling
they couldn't be milling	I couldn't have milled
you couldn't have milled
he couldn't have milled
we couldn't have milled
you couldn't have milled
they couldn't have milled	I couldn't have been milling
you couldn't have been milling
he couldn't have been milling
we couldn't have been milling
you couldn't have been milling
they couldn't have been milling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I mill?
could you mill?
could he mill?
could we mill?
could you mill?
could they mill? 	could I be milling?
could you be milling?
could he be milling?
could we be milling?
could you be milling?
could they be milling? 	could I have milled?
could you have milled?
could he have milled?
could we have milled?
could you have milled?
could they have milled? 	could I have been milling?
could you have been milling?
could he have been milling?
could we have been milling?
could you have been milling?
could they have been milling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I mill?
couldn't you mill?
couldn't he mill?
couldn't we mill?
couldn't you mill?
couldn't they mill? 	couldn't I be milling?
couldn't you be milling?
couldn't he be milling?
couldn't we be milling?
couldn't you be milling?
couldn't they be milling? 	couldn't I have milled?
couldn't you have milled?
couldn't he have milled?
couldn't we have milled?
couldn't you have milled?
couldn't they have milled? 	couldn't I have been milling?
couldn't you have been milling?
couldn't he have been milling?
couldn't we have been milling?
couldn't you have been milling?
couldn't they have been milling?