could ultracentrifuge
Verbo regular: ultracentrifuge - ultracentrifuged- ultracentrifuged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could ultracentrifuge
you could ultracentrifuge
he could ultracentrifuge
we could ultracentrifuge
you could ultracentrifuge
they could ultracentrifuge 	I could be ultracentrifuging
you could be ultracentrifuging
he could be ultracentrifuging
we could be ultracentrifuging
you could be ultracentrifuging
they could be ultracentrifuging	I could have ultracentrifuged
you could have ultracentrifuged
he could have ultracentrifuged
we could have ultracentrifuged
you could have ultracentrifuged
they could have ultracentrifuged	I could have been ultracentrifuging
you could have been ultracentrifuging
he could have been ultracentrifuging
we could have been ultracentrifuging
you could have been ultracentrifuging
they could have been ultracentrifuging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not ultracentrifuge
you could not ultracentrifuge
he could not ultracentrifuge
we could not ultracentrifuge
you could not ultracentrifuge
they could not ultracentrifuge 	I could not be ultracentrifuging
you could not be ultracentrifuging
he could not be ultracentrifuging
we could not be ultracentrifuging
you could not be ultracentrifuging
they could not be ultracentrifuging	I could not have ultracentrifuged
you could not have ultracentrifuged
he could not have ultracentrifuged
we could not have ultracentrifuged
you could not have ultracentrifuged
they could not have ultracentrifuged	I could not have been ultracentrifuging
you could not have been ultracentrifuging
he could not have been ultracentrifuging
we could not have been ultracentrifuging
you could not have been ultracentrifuging
they could not have been ultracentrifuging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I ultracentrifuge?
could you ultracentrifuge?
could he ultracentrifuge?
could we ultracentrifuge?
could you ultracentrifuge?
could they ultracentrifuge? 	could I be ultracentrifuging?
could you be ultracentrifuging?
could he be ultracentrifuging?
could we be ultracentrifuging?
could you be ultracentrifuging?
could they be ultracentrifuging? 	could I have ultracentrifuged?
could you have ultracentrifuged?
could he have ultracentrifuged?
could we have ultracentrifuged?
could you have ultracentrifuged?
could they have ultracentrifuged? 	could I have been ultracentrifuging?
could you have been ultracentrifuging?
could he have been ultracentrifuging?
could we have been ultracentrifuging?
could you have been ultracentrifuging?
could they have been ultracentrifuging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not ultracentrifuge?
could you not ultracentrifuge?
could he not ultracentrifuge?
could we not ultracentrifuge?
could you not ultracentrifuge?
could they not ultracentrifuge? 	could I not be ultracentrifuging?
could you not be ultracentrifuging?
could he not be ultracentrifuging?
could we not be ultracentrifuging?
could you not be ultracentrifuging?
could they not be ultracentrifuging? 	could I not have ultracentrifuged?
could you not have ultracentrifuged?
could he not have ultracentrifuged?
could we not have ultracentrifuged?
could you not have ultracentrifuged?
could they not have ultracentrifuged? 	could I not have been ultracentrifuging?
could you not have been ultracentrifuging?
could he not have been ultracentrifuging?
could we not have been ultracentrifuging?
could you not have been ultracentrifuging?
could they not have been ultracentrifuging?