could shuttle
Verbo regular: shuttle - shuttled- shuttled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could shuttle
you could shuttle
he could shuttle
we could shuttle
you could shuttle
they could shuttle 	I could be shuttling
you could be shuttling
he could be shuttling
we could be shuttling
you could be shuttling
they could be shuttling	I could have shuttled
you could have shuttled
he could have shuttled
we could have shuttled
you could have shuttled
they could have shuttled	I could have been shuttling
you could have been shuttling
he could have been shuttling
we could have been shuttling
you could have been shuttling
they could have been shuttling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not shuttle
you could not shuttle
he could not shuttle
we could not shuttle
you could not shuttle
they could not shuttle 	I could not be shuttling
you could not be shuttling
he could not be shuttling
we could not be shuttling
you could not be shuttling
they could not be shuttling	I could not have shuttled
you could not have shuttled
he could not have shuttled
we could not have shuttled
you could not have shuttled
they could not have shuttled	I could not have been shuttling
you could not have been shuttling
he could not have been shuttling
we could not have been shuttling
you could not have been shuttling
they could not have been shuttling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I shuttle?
could you shuttle?
could he shuttle?
could we shuttle?
could you shuttle?
could they shuttle? 	could I be shuttling?
could you be shuttling?
could he be shuttling?
could we be shuttling?
could you be shuttling?
could they be shuttling? 	could I have shuttled?
could you have shuttled?
could he have shuttled?
could we have shuttled?
could you have shuttled?
could they have shuttled? 	could I have been shuttling?
could you have been shuttling?
could he have been shuttling?
could we have been shuttling?
could you have been shuttling?
could they have been shuttling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not shuttle?
could you not shuttle?
could he not shuttle?
could we not shuttle?
could you not shuttle?
could they not shuttle? 	could I not be shuttling?
could you not be shuttling?
could he not be shuttling?
could we not be shuttling?
could you not be shuttling?
could they not be shuttling? 	could I not have shuttled?
could you not have shuttled?
could he not have shuttled?
could we not have shuttled?
could you not have shuttled?
could they not have shuttled? 	could I not have been shuttling?
could you not have been shuttling?
could he not have been shuttling?
could we not have been shuttling?
could you not have been shuttling?
could they not have been shuttling?