could subtend
Verbo regular: subtend - subtended- subtended

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could subtend
you could subtend
he could subtend
we could subtend
you could subtend
they could subtend 	I could be subtending
you could be subtending
he could be subtending
we could be subtending
you could be subtending
they could be subtending	I could have subtended
you could have subtended
he could have subtended
we could have subtended
you could have subtended
they could have subtended	I could have been subtending
you could have been subtending
he could have been subtending
we could have been subtending
you could have been subtending
they could have been subtending	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not subtend
you could not subtend
he could not subtend
we could not subtend
you could not subtend
they could not subtend 	I could not be subtending
you could not be subtending
he could not be subtending
we could not be subtending
you could not be subtending
they could not be subtending	I could not have subtended
you could not have subtended
he could not have subtended
we could not have subtended
you could not have subtended
they could not have subtended	I could not have been subtending
you could not have been subtending
he could not have been subtending
we could not have been subtending
you could not have been subtending
they could not have been subtending	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I subtend?
could you subtend?
could he subtend?
could we subtend?
could you subtend?
could they subtend? 	could I be subtending?
could you be subtending?
could he be subtending?
could we be subtending?
could you be subtending?
could they be subtending? 	could I have subtended?
could you have subtended?
could he have subtended?
could we have subtended?
could you have subtended?
could they have subtended? 	could I have been subtending?
could you have been subtending?
could he have been subtending?
could we have been subtending?
could you have been subtending?
could they have been subtending? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not subtend?
could you not subtend?
could he not subtend?
could we not subtend?
could you not subtend?
could they not subtend? 	could I not be subtending?
could you not be subtending?
could he not be subtending?
could we not be subtending?
could you not be subtending?
could they not be subtending? 	could I not have subtended?
could you not have subtended?
could he not have subtended?
could we not have subtended?
could you not have subtended?
could they not have subtended? 	could I not have been subtending?
could you not have been subtending?
could he not have been subtending?
could we not have been subtending?
could you not have been subtending?
could they not have been subtending?