could border
Verbo regular: border - bordered- bordered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could border
you could border
he could border
we could border
you could border
they could border 	I could be bordering
you could be bordering
he could be bordering
we could be bordering
you could be bordering
they could be bordering	I could have bordered
you could have bordered
he could have bordered
we could have bordered
you could have bordered
they could have bordered	I could have been bordering
you could have been bordering
he could have been bordering
we could have been bordering
you could have been bordering
they could have been bordering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't border
you couldn't border
he couldn't border
we couldn't border
you couldn't border
they couldn't border 	I couldn't be bordering
you couldn't be bordering
he couldn't be bordering
we couldn't be bordering
you couldn't be bordering
they couldn't be bordering	I couldn't have bordered
you couldn't have bordered
he couldn't have bordered
we couldn't have bordered
you couldn't have bordered
they couldn't have bordered	I couldn't have been bordering
you couldn't have been bordering
he couldn't have been bordering
we couldn't have been bordering
you couldn't have been bordering
they couldn't have been bordering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I border?
could you border?
could he border?
could we border?
could you border?
could they border? 	could I be bordering?
could you be bordering?
could he be bordering?
could we be bordering?
could you be bordering?
could they be bordering? 	could I have bordered?
could you have bordered?
could he have bordered?
could we have bordered?
could you have bordered?
could they have bordered? 	could I have been bordering?
could you have been bordering?
could he have been bordering?
could we have been bordering?
could you have been bordering?
could they have been bordering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I border?
couldn't you border?
couldn't he border?
couldn't we border?
couldn't you border?
couldn't they border? 	couldn't I be bordering?
couldn't you be bordering?
couldn't he be bordering?
couldn't we be bordering?
couldn't you be bordering?
couldn't they be bordering? 	couldn't I have bordered?
couldn't you have bordered?
couldn't he have bordered?
couldn't we have bordered?
couldn't you have bordered?
couldn't they have bordered? 	couldn't I have been bordering?
couldn't you have been bordering?
couldn't he have been bordering?
couldn't we have been bordering?
couldn't you have been bordering?
couldn't they have been bordering?