must rifle
Regular verb: rifle - rifled- rifled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must rifle
you must rifle
she must rifle
we must rifle
you must rifle
they must rifle 	I must be rifling
you must be rifling
she must be rifling
we must be rifling
you must be rifling
they must be rifling	I must have rifled
you must have rifled
she must have rifled
we must have rifled
you must have rifled
they must have rifled	I must have been rifling
you must have been rifling
she must have been rifling
we must have been rifling
you must have been rifling
they must have been rifling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't rifle
you mustn't rifle
she mustn't rifle
we mustn't rifle
you mustn't rifle
they mustn't rifle 	I mustn't be rifling
you mustn't be rifling
she mustn't be rifling
we mustn't be rifling
you mustn't be rifling
they mustn't be rifling	I mustn't have rifled
you mustn't have rifled
she mustn't have rifled
we mustn't have rifled
you mustn't have rifled
they mustn't have rifled	I mustn't have been rifling
you mustn't have been rifling
she mustn't have been rifling
we mustn't have been rifling
you mustn't have been rifling
they mustn't have been rifling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I rifle?
must you rifle?
must she rifle?
must we rifle?
must you rifle?
must they rifle? 	must I be rifling?
must you be rifling?
must she be rifling?
must we be rifling?
must you be rifling?
must they be rifling? 	must I have rifled?
must you have rifled?
must she have rifled?
must we have rifled?
must you have rifled?
must they have rifled? 	must I have been rifling?
must you have been rifling?
must she have been rifling?
must we have been rifling?
must you have been rifling?
must they have been rifling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I rifle?
mustn't you rifle?
mustn't she rifle?
mustn't we rifle?
mustn't you rifle?
mustn't they rifle? 	mustn't I be rifling?
mustn't you be rifling?
mustn't she be rifling?
mustn't we be rifling?
mustn't you be rifling?
mustn't they be rifling? 	mustn't I have rifled?
mustn't you have rifled?
mustn't she have rifled?
mustn't we have rifled?
mustn't you have rifled?
mustn't they have rifled? 	mustn't I have been rifling?
mustn't you have been rifling?
mustn't she have been rifling?
mustn't we have been rifling?
mustn't you have been rifling?
mustn't they have been rifling?