must pig
Regular verb: pig - pigged- pigged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must pig
you must pig
she must pig
we must pig
you must pig
they must pig 	I must be pigging
you must be pigging
she must be pigging
we must be pigging
you must be pigging
they must be pigging	I must have pigged
you must have pigged
she must have pigged
we must have pigged
you must have pigged
they must have pigged	I must have been pigging
you must have been pigging
she must have been pigging
we must have been pigging
you must have been pigging
they must have been pigging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't pig
you mustn't pig
she mustn't pig
we mustn't pig
you mustn't pig
they mustn't pig 	I mustn't be pigging
you mustn't be pigging
she mustn't be pigging
we mustn't be pigging
you mustn't be pigging
they mustn't be pigging	I mustn't have pigged
you mustn't have pigged
she mustn't have pigged
we mustn't have pigged
you mustn't have pigged
they mustn't have pigged	I mustn't have been pigging
you mustn't have been pigging
she mustn't have been pigging
we mustn't have been pigging
you mustn't have been pigging
they mustn't have been pigging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I pig?
must you pig?
must she pig?
must we pig?
must you pig?
must they pig? 	must I be pigging?
must you be pigging?
must she be pigging?
must we be pigging?
must you be pigging?
must they be pigging? 	must I have pigged?
must you have pigged?
must she have pigged?
must we have pigged?
must you have pigged?
must they have pigged? 	must I have been pigging?
must you have been pigging?
must she have been pigging?
must we have been pigging?
must you have been pigging?
must they have been pigging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I pig?
mustn't you pig?
mustn't she pig?
mustn't we pig?
mustn't you pig?
mustn't they pig? 	mustn't I be pigging?
mustn't you be pigging?
mustn't she be pigging?
mustn't we be pigging?
mustn't you be pigging?
mustn't they be pigging? 	mustn't I have pigged?
mustn't you have pigged?
mustn't she have pigged?
mustn't we have pigged?
mustn't you have pigged?
mustn't they have pigged? 	mustn't I have been pigging?
mustn't you have been pigging?
mustn't she have been pigging?
mustn't we have been pigging?
mustn't you have been pigging?
mustn't they have been pigging?