could contaminate
Verbo regular: contaminate - contaminated- contaminated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could contaminate
you could contaminate
she could contaminate
we could contaminate
you could contaminate
they could contaminate 	I could be contaminating
you could be contaminating
she could be contaminating
we could be contaminating
you could be contaminating
they could be contaminating	I could have contaminated
you could have contaminated
she could have contaminated
we could have contaminated
you could have contaminated
they could have contaminated	I could have been contaminating
you could have been contaminating
she could have been contaminating
we could have been contaminating
you could have been contaminating
they could have been contaminating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not contaminate
you could not contaminate
she could not contaminate
we could not contaminate
you could not contaminate
they could not contaminate 	I could not be contaminating
you could not be contaminating
she could not be contaminating
we could not be contaminating
you could not be contaminating
they could not be contaminating	I could not have contaminated
you could not have contaminated
she could not have contaminated
we could not have contaminated
you could not have contaminated
they could not have contaminated	I could not have been contaminating
you could not have been contaminating
she could not have been contaminating
we could not have been contaminating
you could not have been contaminating
they could not have been contaminating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I contaminate?
could you contaminate?
could she contaminate?
could we contaminate?
could you contaminate?
could they contaminate? 	could I be contaminating?
could you be contaminating?
could she be contaminating?
could we be contaminating?
could you be contaminating?
could they be contaminating? 	could I have contaminated?
could you have contaminated?
could she have contaminated?
could we have contaminated?
could you have contaminated?
could they have contaminated? 	could I have been contaminating?
could you have been contaminating?
could she have been contaminating?
could we have been contaminating?
could you have been contaminating?
could they have been contaminating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not contaminate?
could you not contaminate?
could she not contaminate?
could we not contaminate?
could you not contaminate?
could they not contaminate? 	could I not be contaminating?
could you not be contaminating?
could she not be contaminating?
could we not be contaminating?
could you not be contaminating?
could they not be contaminating? 	could I not have contaminated?
could you not have contaminated?
could she not have contaminated?
could we not have contaminated?
could you not have contaminated?
could they not have contaminated? 	could I not have been contaminating?
could you not have been contaminating?
could she not have been contaminating?
could we not have been contaminating?
could you not have been contaminating?
could they not have been contaminating?