could spell-check
Verbo regular: spell-check - spell-checked- spell-checked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could spell-check
you could spell-check
he could spell-check
we could spell-check
you could spell-check
they could spell-check 	I could be spell-checking
you could be spell-checking
he could be spell-checking
we could be spell-checking
you could be spell-checking
they could be spell-checking	I could have spell-checked
you could have spell-checked
he could have spell-checked
we could have spell-checked
you could have spell-checked
they could have spell-checked	I could have been spell-checking
you could have been spell-checking
he could have been spell-checking
we could have been spell-checking
you could have been spell-checking
they could have been spell-checking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not spell-check
you could not spell-check
he could not spell-check
we could not spell-check
you could not spell-check
they could not spell-check 	I could not be spell-checking
you could not be spell-checking
he could not be spell-checking
we could not be spell-checking
you could not be spell-checking
they could not be spell-checking	I could not have spell-checked
you could not have spell-checked
he could not have spell-checked
we could not have spell-checked
you could not have spell-checked
they could not have spell-checked	I could not have been spell-checking
you could not have been spell-checking
he could not have been spell-checking
we could not have been spell-checking
you could not have been spell-checking
they could not have been spell-checking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I spell-check?
could you spell-check?
could he spell-check?
could we spell-check?
could you spell-check?
could they spell-check? 	could I be spell-checking?
could you be spell-checking?
could he be spell-checking?
could we be spell-checking?
could you be spell-checking?
could they be spell-checking? 	could I have spell-checked?
could you have spell-checked?
could he have spell-checked?
could we have spell-checked?
could you have spell-checked?
could they have spell-checked? 	could I have been spell-checking?
could you have been spell-checking?
could he have been spell-checking?
could we have been spell-checking?
could you have been spell-checking?
could they have been spell-checking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not spell-check?
could you not spell-check?
could he not spell-check?
could we not spell-check?
could you not spell-check?
could they not spell-check? 	could I not be spell-checking?
could you not be spell-checking?
could he not be spell-checking?
could we not be spell-checking?
could you not be spell-checking?
could they not be spell-checking? 	could I not have spell-checked?
could you not have spell-checked?
could he not have spell-checked?
could we not have spell-checked?
could you not have spell-checked?
could they not have spell-checked? 	could I not have been spell-checking?
could you not have been spell-checking?
could he not have been spell-checking?
could we not have been spell-checking?
could you not have been spell-checking?
could they not have been spell-checking?