could backcheck
Verbo regular: backcheck - backchecked- backchecked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could backcheck
you could backcheck
he could backcheck
we could backcheck
you could backcheck
they could backcheck 	I could be backchecking
you could be backchecking
he could be backchecking
we could be backchecking
you could be backchecking
they could be backchecking	I could have backchecked
you could have backchecked
he could have backchecked
we could have backchecked
you could have backchecked
they could have backchecked	I could have been backchecking
you could have been backchecking
he could have been backchecking
we could have been backchecking
you could have been backchecking
they could have been backchecking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not backcheck
you could not backcheck
he could not backcheck
we could not backcheck
you could not backcheck
they could not backcheck 	I could not be backchecking
you could not be backchecking
he could not be backchecking
we could not be backchecking
you could not be backchecking
they could not be backchecking	I could not have backchecked
you could not have backchecked
he could not have backchecked
we could not have backchecked
you could not have backchecked
they could not have backchecked	I could not have been backchecking
you could not have been backchecking
he could not have been backchecking
we could not have been backchecking
you could not have been backchecking
they could not have been backchecking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I backcheck?
could you backcheck?
could he backcheck?
could we backcheck?
could you backcheck?
could they backcheck? 	could I be backchecking?
could you be backchecking?
could he be backchecking?
could we be backchecking?
could you be backchecking?
could they be backchecking? 	could I have backchecked?
could you have backchecked?
could he have backchecked?
could we have backchecked?
could you have backchecked?
could they have backchecked? 	could I have been backchecking?
could you have been backchecking?
could he have been backchecking?
could we have been backchecking?
could you have been backchecking?
could they have been backchecking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not backcheck?
could you not backcheck?
could he not backcheck?
could we not backcheck?
could you not backcheck?
could they not backcheck? 	could I not be backchecking?
could you not be backchecking?
could he not be backchecking?
could we not be backchecking?
could you not be backchecking?
could they not be backchecking? 	could I not have backchecked?
could you not have backchecked?
could he not have backchecked?
could we not have backchecked?
could you not have backchecked?
could they not have backchecked? 	could I not have been backchecking?
could you not have been backchecking?
could he not have been backchecking?
could we not have been backchecking?
could you not have been backchecking?
could they not have been backchecking?