could believe
Verbo regular: believe - believed- believed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could believe
you could believe
she could believe
we could believe
you could believe
they could believe 	I could be believing
you could be believing
she could be believing
we could be believing
you could be believing
they could be believing	I could have believed
you could have believed
she could have believed
we could have believed
you could have believed
they could have believed	I could have been believing
you could have been believing
she could have been believing
we could have been believing
you could have been believing
they could have been believing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not believe
you could not believe
she could not believe
we could not believe
you could not believe
they could not believe 	I could not be believing
you could not be believing
she could not be believing
we could not be believing
you could not be believing
they could not be believing	I could not have believed
you could not have believed
she could not have believed
we could not have believed
you could not have believed
they could not have believed	I could not have been believing
you could not have been believing
she could not have been believing
we could not have been believing
you could not have been believing
they could not have been believing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I believe?
could you believe?
could she believe?
could we believe?
could you believe?
could they believe? 	could I be believing?
could you be believing?
could she be believing?
could we be believing?
could you be believing?
could they be believing? 	could I have believed?
could you have believed?
could she have believed?
could we have believed?
could you have believed?
could they have believed? 	could I have been believing?
could you have been believing?
could she have been believing?
could we have been believing?
could you have been believing?
could they have been believing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not believe?
could you not believe?
could she not believe?
could we not believe?
could you not believe?
could they not believe? 	could I not be believing?
could you not be believing?
could she not be believing?
could we not be believing?
could you not be believing?
could they not be believing? 	could I not have believed?
could you not have believed?
could she not have believed?
could we not have believed?
could you not have believed?
could they not have believed? 	could I not have been believing?
could you not have been believing?
could she not have been believing?
could we not have been believing?
could you not have been believing?
could they not have been believing?