must jug
Regular verb: jug - jugged- jugged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must jug
you must jug
he must jug
we must jug
you must jug
they must jug 	I must be jugging
you must be jugging
he must be jugging
we must be jugging
you must be jugging
they must be jugging	I must have jugged
you must have jugged
he must have jugged
we must have jugged
you must have jugged
they must have jugged	I must have been jugging
you must have been jugging
he must have been jugging
we must have been jugging
you must have been jugging
they must have been jugging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't jug
you mustn't jug
he mustn't jug
we mustn't jug
you mustn't jug
they mustn't jug 	I mustn't be jugging
you mustn't be jugging
he mustn't be jugging
we mustn't be jugging
you mustn't be jugging
they mustn't be jugging	I mustn't have jugged
you mustn't have jugged
he mustn't have jugged
we mustn't have jugged
you mustn't have jugged
they mustn't have jugged	I mustn't have been jugging
you mustn't have been jugging
he mustn't have been jugging
we mustn't have been jugging
you mustn't have been jugging
they mustn't have been jugging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I jug?
must you jug?
must he jug?
must we jug?
must you jug?
must they jug? 	must I be jugging?
must you be jugging?
must he be jugging?
must we be jugging?
must you be jugging?
must they be jugging? 	must I have jugged?
must you have jugged?
must he have jugged?
must we have jugged?
must you have jugged?
must they have jugged? 	must I have been jugging?
must you have been jugging?
must he have been jugging?
must we have been jugging?
must you have been jugging?
must they have been jugging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I jug?
mustn't you jug?
mustn't he jug?
mustn't we jug?
mustn't you jug?
mustn't they jug? 	mustn't I be jugging?
mustn't you be jugging?
mustn't he be jugging?
mustn't we be jugging?
mustn't you be jugging?
mustn't they be jugging? 	mustn't I have jugged?
mustn't you have jugged?
mustn't he have jugged?
mustn't we have jugged?
mustn't you have jugged?
mustn't they have jugged? 	mustn't I have been jugging?
mustn't you have been jugging?
mustn't he have been jugging?
mustn't we have been jugging?
mustn't you have been jugging?
mustn't they have been jugging?