must sentinel
Regular verb: sentinel - sentineled- sentineled

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

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

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

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