could malfunction
Verbo regular: malfunction - malfunctioned- malfunctioned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could malfunction
you could malfunction
he could malfunction
we could malfunction
you could malfunction
they could malfunction 	I could be malfunctioning
you could be malfunctioning
he could be malfunctioning
we could be malfunctioning
you could be malfunctioning
they could be malfunctioning	I could have malfunctioned
you could have malfunctioned
he could have malfunctioned
we could have malfunctioned
you could have malfunctioned
they could have malfunctioned	I could have been malfunctioning
you could have been malfunctioning
he could have been malfunctioning
we could have been malfunctioning
you could have been malfunctioning
they could have been malfunctioning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not malfunction
you could not malfunction
he could not malfunction
we could not malfunction
you could not malfunction
they could not malfunction 	I could not be malfunctioning
you could not be malfunctioning
he could not be malfunctioning
we could not be malfunctioning
you could not be malfunctioning
they could not be malfunctioning	I could not have malfunctioned
you could not have malfunctioned
he could not have malfunctioned
we could not have malfunctioned
you could not have malfunctioned
they could not have malfunctioned	I could not have been malfunctioning
you could not have been malfunctioning
he could not have been malfunctioning
we could not have been malfunctioning
you could not have been malfunctioning
they could not have been malfunctioning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I malfunction?
could you malfunction?
could he malfunction?
could we malfunction?
could you malfunction?
could they malfunction? 	could I be malfunctioning?
could you be malfunctioning?
could he be malfunctioning?
could we be malfunctioning?
could you be malfunctioning?
could they be malfunctioning? 	could I have malfunctioned?
could you have malfunctioned?
could he have malfunctioned?
could we have malfunctioned?
could you have malfunctioned?
could they have malfunctioned? 	could I have been malfunctioning?
could you have been malfunctioning?
could he have been malfunctioning?
could we have been malfunctioning?
could you have been malfunctioning?
could they have been malfunctioning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not malfunction?
could you not malfunction?
could he not malfunction?
could we not malfunction?
could you not malfunction?
could they not malfunction? 	could I not be malfunctioning?
could you not be malfunctioning?
could he not be malfunctioning?
could we not be malfunctioning?
could you not be malfunctioning?
could they not be malfunctioning? 	could I not have malfunctioned?
could you not have malfunctioned?
could he not have malfunctioned?
could we not have malfunctioned?
could you not have malfunctioned?
could they not have malfunctioned? 	could I not have been malfunctioning?
could you not have been malfunctioning?
could he not have been malfunctioning?
could we not have been malfunctioning?
could you not have been malfunctioning?
could they not have been malfunctioning?