can comment
Verbo regular: comment - commented- commented

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

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't comment
you can't comment
she can't comment
we can't comment
you can't comment
they can't comment 	I can't be commenting
you can't be commenting
she can't be commenting
we can't be commenting
you can't be commenting
they can't be commenting	I can't have commented
you can't have commented
she can't have commented
we can't have commented
you can't have commented
they can't have commented	I can't have been commenting
you can't have been commenting
she can't have been commenting
we can't have been commenting
you can't have been commenting
they can't have been commenting	

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

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