could sentinel
Verbo regular: sentinel - sentineled- sentineled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could sentinel
you could sentinel
he could sentinel
we could sentinel
you could sentinel
they could sentinel 	I could be sentineling
you could be sentineling
he could be sentineling
we could be sentineling
you could be sentineling
they could be sentineling	I could have sentineled
you could have sentineled
he could have sentineled
we could have sentineled
you could have sentineled
they could have sentineled	I could have been sentineling
you could have been sentineling
he could have been sentineling
we could have been sentineling
you could have been sentineling
they could have been sentineling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not sentinel
you could not sentinel
he could not sentinel
we could not sentinel
you could not sentinel
they could not sentinel 	I could not be sentineling
you could not be sentineling
he could not be sentineling
we could not be sentineling
you could not be sentineling
they could not be sentineling	I could not have sentineled
you could not have sentineled
he could not have sentineled
we could not have sentineled
you could not have sentineled
they could not have sentineled	I could not have been sentineling
you could not have been sentineling
he could not have been sentineling
we could not have been sentineling
you could not have been sentineling
they could not have been sentineling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I sentinel?
could you sentinel?
could he sentinel?
could we sentinel?
could you sentinel?
could they sentinel? 	could I be sentineling?
could you be sentineling?
could he be sentineling?
could we be sentineling?
could you be sentineling?
could they be sentineling? 	could I have sentineled?
could you have sentineled?
could he have sentineled?
could we have sentineled?
could you have sentineled?
could they have sentineled? 	could I have been sentineling?
could you have been sentineling?
could he have been sentineling?
could we have been sentineling?
could you have been sentineling?
could they have been sentineling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not sentinel?
could you not sentinel?
could he not sentinel?
could we not sentinel?
could you not sentinel?
could they not sentinel? 	could I not be sentineling?
could you not be sentineling?
could he not be sentineling?
could we not be sentineling?
could you not be sentineling?
could they not be sentineling? 	could I not have sentineled?
could you not have sentineled?
could he not have sentineled?
could we not have sentineled?
could you not have sentineled?
could they not have sentineled? 	could I not have been sentineling?
could you not have been sentineling?
could he not have been sentineling?
could we not have been sentineling?
could you not have been sentineling?
could they not have been sentineling?