can sentinel
Regular verb: sentinel - sentineled- sentineled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sentinel
you can sentinel
he can sentinel
we can sentinel
you can sentinel
they can sentinel 	I can be sentineling
you can be sentineling
he can be sentineling
we can be sentineling
you can be sentineling
they can be sentineling	I can have sentineled
you can have sentineled
he can have sentineled
we can have sentineled
you can have sentineled
they can have sentineled	I can have been sentineling
you can have been sentineling
he can have been sentineling
we can have been sentineling
you can have been sentineling
they can have been sentineling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot sentinel
you cannot sentinel
he cannot sentinel
we cannot sentinel
you cannot sentinel
they cannot sentinel 	I cannot be sentineling
you cannot be sentineling
he cannot be sentineling
we cannot be sentineling
you cannot be sentineling
they cannot be sentineling	I cannot have sentineled
you cannot have sentineled
he cannot have sentineled
we cannot have sentineled
you cannot have sentineled
they cannot have sentineled	I cannot have been sentineling
you cannot have been sentineling
he cannot have been sentineling
we cannot have been sentineling
you cannot have been sentineling
they cannot have been sentineling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sentinel?
can you sentinel?
can he sentinel?
can we sentinel?
can you sentinel?
can they sentinel? 	can I be sentineling?
can you be sentineling?
can he be sentineling?
can we be sentineling?
can you be sentineling?
can they be sentineling? 	can I have sentineled?
can you have sentineled?
can he have sentineled?
can we have sentineled?
can you have sentineled?
can they have sentineled? 	can I have been sentineling?
can you have been sentineling?
can he have been sentineling?
can we have been sentineling?
can you have been sentineling?
can they have been sentineling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not sentinel?
can you not sentinel?
can he not sentinel?
can we not sentinel?
can you not sentinel?
can they not sentinel? 	can I not be sentineling?
can you not be sentineling?
can he not be sentineling?
can we not be sentineling?
can you not be sentineling?
can they not be sentineling? 	can I not have sentineled?
can you not have sentineled?
can he not have sentineled?
can we not have sentineled?
can you not have sentineled?
can they not have sentineled? 	can I not have been sentineling?
can you not have been sentineling?
can he not have been sentineling?
can we not have been sentineling?
can you not have been sentineling?
can they not have been sentineling?