must snug
Regular verb: snug - snugged- snugged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must snug
you must snug
she must snug
we must snug
you must snug
they must snug 	I must be snugging
you must be snugging
she must be snugging
we must be snugging
you must be snugging
they must be snugging	I must have snugged
you must have snugged
she must have snugged
we must have snugged
you must have snugged
they must have snugged	I must have been snugging
you must have been snugging
she must have been snugging
we must have been snugging
you must have been snugging
they must have been snugging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't snug
you mustn't snug
she mustn't snug
we mustn't snug
you mustn't snug
they mustn't snug 	I mustn't be snugging
you mustn't be snugging
she mustn't be snugging
we mustn't be snugging
you mustn't be snugging
they mustn't be snugging	I mustn't have snugged
you mustn't have snugged
she mustn't have snugged
we mustn't have snugged
you mustn't have snugged
they mustn't have snugged	I mustn't have been snugging
you mustn't have been snugging
she mustn't have been snugging
we mustn't have been snugging
you mustn't have been snugging
they mustn't have been snugging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I snug?
must you snug?
must she snug?
must we snug?
must you snug?
must they snug? 	must I be snugging?
must you be snugging?
must she be snugging?
must we be snugging?
must you be snugging?
must they be snugging? 	must I have snugged?
must you have snugged?
must she have snugged?
must we have snugged?
must you have snugged?
must they have snugged? 	must I have been snugging?
must you have been snugging?
must she have been snugging?
must we have been snugging?
must you have been snugging?
must they have been snugging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I snug?
mustn't you snug?
mustn't she snug?
mustn't we snug?
mustn't you snug?
mustn't they snug? 	mustn't I be snugging?
mustn't you be snugging?
mustn't she be snugging?
mustn't we be snugging?
mustn't you be snugging?
mustn't they be snugging? 	mustn't I have snugged?
mustn't you have snugged?
mustn't she have snugged?
mustn't we have snugged?
mustn't you have snugged?
mustn't they have snugged? 	mustn't I have been snugging?
mustn't you have been snugging?
mustn't she have been snugging?
mustn't we have been snugging?
mustn't you have been snugging?
mustn't they have been snugging?