should sentinel
Regular verb: sentinel - sentineled- sentineled

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

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

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

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