must sluice
Regular verb: sluice - sluiced- sluiced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must sluice
you must sluice
he must sluice
we must sluice
you must sluice
they must sluice 	I must be sluicing
you must be sluicing
he must be sluicing
we must be sluicing
you must be sluicing
they must be sluicing	I must have sluiced
you must have sluiced
he must have sluiced
we must have sluiced
you must have sluiced
they must have sluiced	I must have been sluicing
you must have been sluicing
he must have been sluicing
we must have been sluicing
you must have been sluicing
they must have been sluicing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't sluice
you mustn't sluice
he mustn't sluice
we mustn't sluice
you mustn't sluice
they mustn't sluice 	I mustn't be sluicing
you mustn't be sluicing
he mustn't be sluicing
we mustn't be sluicing
you mustn't be sluicing
they mustn't be sluicing	I mustn't have sluiced
you mustn't have sluiced
he mustn't have sluiced
we mustn't have sluiced
you mustn't have sluiced
they mustn't have sluiced	I mustn't have been sluicing
you mustn't have been sluicing
he mustn't have been sluicing
we mustn't have been sluicing
you mustn't have been sluicing
they mustn't have been sluicing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I sluice?
must you sluice?
must he sluice?
must we sluice?
must you sluice?
must they sluice? 	must I be sluicing?
must you be sluicing?
must he be sluicing?
must we be sluicing?
must you be sluicing?
must they be sluicing? 	must I have sluiced?
must you have sluiced?
must he have sluiced?
must we have sluiced?
must you have sluiced?
must they have sluiced? 	must I have been sluicing?
must you have been sluicing?
must he have been sluicing?
must we have been sluicing?
must you have been sluicing?
must they have been sluicing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I sluice?
mustn't you sluice?
mustn't he sluice?
mustn't we sluice?
mustn't you sluice?
mustn't they sluice? 	mustn't I be sluicing?
mustn't you be sluicing?
mustn't he be sluicing?
mustn't we be sluicing?
mustn't you be sluicing?
mustn't they be sluicing? 	mustn't I have sluiced?
mustn't you have sluiced?
mustn't he have sluiced?
mustn't we have sluiced?
mustn't you have sluiced?
mustn't they have sluiced? 	mustn't I have been sluicing?
mustn't you have been sluicing?
mustn't he have been sluicing?
mustn't we have been sluicing?
mustn't you have been sluicing?
mustn't they have been sluicing?