could denature
Verbo regular: denature - denatured- denatured

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could denature
you could denature
she could denature
we could denature
you could denature
they could denature 	I could be denaturing
you could be denaturing
she could be denaturing
we could be denaturing
you could be denaturing
they could be denaturing	I could have denatured
you could have denatured
she could have denatured
we could have denatured
you could have denatured
they could have denatured	I could have been denaturing
you could have been denaturing
she could have been denaturing
we could have been denaturing
you could have been denaturing
they could have been denaturing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't denature
you couldn't denature
she couldn't denature
we couldn't denature
you couldn't denature
they couldn't denature 	I couldn't be denaturing
you couldn't be denaturing
she couldn't be denaturing
we couldn't be denaturing
you couldn't be denaturing
they couldn't be denaturing	I couldn't have denatured
you couldn't have denatured
she couldn't have denatured
we couldn't have denatured
you couldn't have denatured
they couldn't have denatured	I couldn't have been denaturing
you couldn't have been denaturing
she couldn't have been denaturing
we couldn't have been denaturing
you couldn't have been denaturing
they couldn't have been denaturing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I denature?
could you denature?
could she denature?
could we denature?
could you denature?
could they denature? 	could I be denaturing?
could you be denaturing?
could she be denaturing?
could we be denaturing?
could you be denaturing?
could they be denaturing? 	could I have denatured?
could you have denatured?
could she have denatured?
could we have denatured?
could you have denatured?
could they have denatured? 	could I have been denaturing?
could you have been denaturing?
could she have been denaturing?
could we have been denaturing?
could you have been denaturing?
could they have been denaturing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I denature?
couldn't you denature?
couldn't she denature?
couldn't we denature?
couldn't you denature?
couldn't they denature? 	couldn't I be denaturing?
couldn't you be denaturing?
couldn't she be denaturing?
couldn't we be denaturing?
couldn't you be denaturing?
couldn't they be denaturing? 	couldn't I have denatured?
couldn't you have denatured?
couldn't she have denatured?
couldn't we have denatured?
couldn't you have denatured?
couldn't they have denatured? 	couldn't I have been denaturing?
couldn't you have been denaturing?
couldn't she have been denaturing?
couldn't we have been denaturing?
couldn't you have been denaturing?
couldn't they have been denaturing?