could milk
Verbo regular: milk - milked- milked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could milk
you could milk
he could milk
we could milk
you could milk
they could milk 	I could be milking
you could be milking
he could be milking
we could be milking
you could be milking
they could be milking	I could have milked
you could have milked
he could have milked
we could have milked
you could have milked
they could have milked	I could have been milking
you could have been milking
he could have been milking
we could have been milking
you could have been milking
they could have been milking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't milk
you couldn't milk
he couldn't milk
we couldn't milk
you couldn't milk
they couldn't milk 	I couldn't be milking
you couldn't be milking
he couldn't be milking
we couldn't be milking
you couldn't be milking
they couldn't be milking	I couldn't have milked
you couldn't have milked
he couldn't have milked
we couldn't have milked
you couldn't have milked
they couldn't have milked	I couldn't have been milking
you couldn't have been milking
he couldn't have been milking
we couldn't have been milking
you couldn't have been milking
they couldn't have been milking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I milk?
could you milk?
could he milk?
could we milk?
could you milk?
could they milk? 	could I be milking?
could you be milking?
could he be milking?
could we be milking?
could you be milking?
could they be milking? 	could I have milked?
could you have milked?
could he have milked?
could we have milked?
could you have milked?
could they have milked? 	could I have been milking?
could you have been milking?
could he have been milking?
could we have been milking?
could you have been milking?
could they have been milking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I milk?
couldn't you milk?
couldn't he milk?
couldn't we milk?
couldn't you milk?
couldn't they milk? 	couldn't I be milking?
couldn't you be milking?
couldn't he be milking?
couldn't we be milking?
couldn't you be milking?
couldn't they be milking? 	couldn't I have milked?
couldn't you have milked?
couldn't he have milked?
couldn't we have milked?
couldn't you have milked?
couldn't they have milked? 	couldn't I have been milking?
couldn't you have been milking?
couldn't he have been milking?
couldn't we have been milking?
couldn't you have been milking?
couldn't they have been milking?