could earn
Verbo regular: earn - earned- earned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could earn
you could earn
he could earn
we could earn
you could earn
they could earn 	I could be earning
you could be earning
he could be earning
we could be earning
you could be earning
they could be earning	I could have earned
you could have earned
he could have earned
we could have earned
you could have earned
they could have earned	I could have been earning
you could have been earning
he could have been earning
we could have been earning
you could have been earning
they could have been earning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't earn
you couldn't earn
he couldn't earn
we couldn't earn
you couldn't earn
they couldn't earn 	I couldn't be earning
you couldn't be earning
he couldn't be earning
we couldn't be earning
you couldn't be earning
they couldn't be earning	I couldn't have earned
you couldn't have earned
he couldn't have earned
we couldn't have earned
you couldn't have earned
they couldn't have earned	I couldn't have been earning
you couldn't have been earning
he couldn't have been earning
we couldn't have been earning
you couldn't have been earning
they couldn't have been earning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I earn?
could you earn?
could he earn?
could we earn?
could you earn?
could they earn? 	could I be earning?
could you be earning?
could he be earning?
could we be earning?
could you be earning?
could they be earning? 	could I have earned?
could you have earned?
could he have earned?
could we have earned?
could you have earned?
could they have earned? 	could I have been earning?
could you have been earning?
could he have been earning?
could we have been earning?
could you have been earning?
could they have been earning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I earn?
couldn't you earn?
couldn't he earn?
couldn't we earn?
couldn't you earn?
couldn't they earn? 	couldn't I be earning?
couldn't you be earning?
couldn't he be earning?
couldn't we be earning?
couldn't you be earning?
couldn't they be earning? 	couldn't I have earned?
couldn't you have earned?
couldn't he have earned?
couldn't we have earned?
couldn't you have earned?
couldn't they have earned? 	couldn't I have been earning?
couldn't you have been earning?
couldn't he have been earning?
couldn't we have been earning?
couldn't you have been earning?
couldn't they have been earning?