could comment
Verbo regular: comment - commented- commented

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could comment
you could comment
she could comment
we could comment
you could comment
they could comment 	I could be commenting
you could be commenting
she could be commenting
we could be commenting
you could be commenting
they could be commenting	I could have commented
you could have commented
she could have commented
we could have commented
you could have commented
they could have commented	I could have been commenting
you could have been commenting
she could have been commenting
we could have been commenting
you could have been commenting
they could have been commenting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not comment
you could not comment
she could not comment
we could not comment
you could not comment
they could not comment 	I could not be commenting
you could not be commenting
she could not be commenting
we could not be commenting
you could not be commenting
they could not be commenting	I could not have commented
you could not have commented
she could not have commented
we could not have commented
you could not have commented
they could not have commented	I could not have been commenting
you could not have been commenting
she could not have been commenting
we could not have been commenting
you could not have been commenting
they could not have been commenting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I comment?
could you comment?
could she comment?
could we comment?
could you comment?
could they comment? 	could I be commenting?
could you be commenting?
could she be commenting?
could we be commenting?
could you be commenting?
could they be commenting? 	could I have commented?
could you have commented?
could she have commented?
could we have commented?
could you have commented?
could they have commented? 	could I have been commenting?
could you have been commenting?
could she have been commenting?
could we have been commenting?
could you have been commenting?
could they have been commenting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not comment?
could you not comment?
could she not comment?
could we not comment?
could you not comment?
could they not comment? 	could I not be commenting?
could you not be commenting?
could she not be commenting?
could we not be commenting?
could you not be commenting?
could they not be commenting? 	could I not have commented?
could you not have commented?
could she not have commented?
could we not have commented?
could you not have commented?
could they not have commented? 	could I not have been commenting?
could you not have been commenting?
could she not have been commenting?
could we not have been commenting?
could you not have been commenting?
could they not have been commenting?