could convince
Verbo regular: convince - convinced- convinced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could convince
you could convince
she could convince
we could convince
you could convince
they could convince 	I could be convincing
you could be convincing
she could be convincing
we could be convincing
you could be convincing
they could be convincing	I could have convinced
you could have convinced
she could have convinced
we could have convinced
you could have convinced
they could have convinced	I could have been convincing
you could have been convincing
she could have been convincing
we could have been convincing
you could have been convincing
they could have been convincing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't convince
you couldn't convince
she couldn't convince
we couldn't convince
you couldn't convince
they couldn't convince 	I couldn't be convincing
you couldn't be convincing
she couldn't be convincing
we couldn't be convincing
you couldn't be convincing
they couldn't be convincing	I couldn't have convinced
you couldn't have convinced
she couldn't have convinced
we couldn't have convinced
you couldn't have convinced
they couldn't have convinced	I couldn't have been convincing
you couldn't have been convincing
she couldn't have been convincing
we couldn't have been convincing
you couldn't have been convincing
they couldn't have been convincing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I convince?
could you convince?
could she convince?
could we convince?
could you convince?
could they convince? 	could I be convincing?
could you be convincing?
could she be convincing?
could we be convincing?
could you be convincing?
could they be convincing? 	could I have convinced?
could you have convinced?
could she have convinced?
could we have convinced?
could you have convinced?
could they have convinced? 	could I have been convincing?
could you have been convincing?
could she have been convincing?
could we have been convincing?
could you have been convincing?
could they have been convincing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I convince?
couldn't you convince?
couldn't she convince?
couldn't we convince?
couldn't you convince?
couldn't they convince? 	couldn't I be convincing?
couldn't you be convincing?
couldn't she be convincing?
couldn't we be convincing?
couldn't you be convincing?
couldn't they be convincing? 	couldn't I have convinced?
couldn't you have convinced?
couldn't she have convinced?
couldn't we have convinced?
couldn't you have convinced?
couldn't they have convinced? 	couldn't I have been convincing?
couldn't you have been convincing?
couldn't she have been convincing?
couldn't we have been convincing?
couldn't you have been convincing?
couldn't they have been convincing?