must prey
Regular verb: prey - preyed- preyed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prey
you must prey
he must prey
we must prey
you must prey
they must prey 	I must be preying
you must be preying
he must be preying
we must be preying
you must be preying
they must be preying	I must have preyed
you must have preyed
he must have preyed
we must have preyed
you must have preyed
they must have preyed	I must have been preying
you must have been preying
he must have been preying
we must have been preying
you must have been preying
they must have been preying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't prey
you mustn't prey
he mustn't prey
we mustn't prey
you mustn't prey
they mustn't prey 	I mustn't be preying
you mustn't be preying
he mustn't be preying
we mustn't be preying
you mustn't be preying
they mustn't be preying	I mustn't have preyed
you mustn't have preyed
he mustn't have preyed
we mustn't have preyed
you mustn't have preyed
they mustn't have preyed	I mustn't have been preying
you mustn't have been preying
he mustn't have been preying
we mustn't have been preying
you mustn't have been preying
they mustn't have been preying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prey?
must you prey?
must he prey?
must we prey?
must you prey?
must they prey? 	must I be preying?
must you be preying?
must he be preying?
must we be preying?
must you be preying?
must they be preying? 	must I have preyed?
must you have preyed?
must he have preyed?
must we have preyed?
must you have preyed?
must they have preyed? 	must I have been preying?
must you have been preying?
must he have been preying?
must we have been preying?
must you have been preying?
must they have been preying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I prey?
mustn't you prey?
mustn't he prey?
mustn't we prey?
mustn't you prey?
mustn't they prey? 	mustn't I be preying?
mustn't you be preying?
mustn't he be preying?
mustn't we be preying?
mustn't you be preying?
mustn't they be preying? 	mustn't I have preyed?
mustn't you have preyed?
mustn't he have preyed?
mustn't we have preyed?
mustn't you have preyed?
mustn't they have preyed? 	mustn't I have been preying?
mustn't you have been preying?
mustn't he have been preying?
mustn't we have been preying?
mustn't you have been preying?
mustn't they have been preying?