could cross-check
Verbo regular: cross-check - cross-checked- cross-checked

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

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

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

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