could discover
Verbo regular: discover - discovered- discovered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could discover
you could discover
she could discover
we could discover
you could discover
they could discover 	I could be discovering
you could be discovering
she could be discovering
we could be discovering
you could be discovering
they could be discovering	I could have discovered
you could have discovered
she could have discovered
we could have discovered
you could have discovered
they could have discovered	I could have been discovering
you could have been discovering
she could have been discovering
we could have been discovering
you could have been discovering
they could have been discovering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not discover
you could not discover
she could not discover
we could not discover
you could not discover
they could not discover 	I could not be discovering
you could not be discovering
she could not be discovering
we could not be discovering
you could not be discovering
they could not be discovering	I could not have discovered
you could not have discovered
she could not have discovered
we could not have discovered
you could not have discovered
they could not have discovered	I could not have been discovering
you could not have been discovering
she could not have been discovering
we could not have been discovering
you could not have been discovering
they could not have been discovering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I discover?
could you discover?
could she discover?
could we discover?
could you discover?
could they discover? 	could I be discovering?
could you be discovering?
could she be discovering?
could we be discovering?
could you be discovering?
could they be discovering? 	could I have discovered?
could you have discovered?
could she have discovered?
could we have discovered?
could you have discovered?
could they have discovered? 	could I have been discovering?
could you have been discovering?
could she have been discovering?
could we have been discovering?
could you have been discovering?
could they have been discovering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not discover?
could you not discover?
could she not discover?
could we not discover?
could you not discover?
could they not discover? 	could I not be discovering?
could you not be discovering?
could she not be discovering?
could we not be discovering?
could you not be discovering?
could they not be discovering? 	could I not have discovered?
could you not have discovered?
could she not have discovered?
could we not have discovered?
could you not have discovered?
could they not have discovered? 	could I not have been discovering?
could you not have been discovering?
could she not have been discovering?
could we not have been discovering?
could you not have been discovering?
could they not have been discovering?