must lick
Regular verb: lick - licked- licked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must lick
you must lick
she must lick
we must lick
you must lick
they must lick 	I must be licking
you must be licking
she must be licking
we must be licking
you must be licking
they must be licking	I must have licked
you must have licked
she must have licked
we must have licked
you must have licked
they must have licked	I must have been licking
you must have been licking
she must have been licking
we must have been licking
you must have been licking
they must have been licking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't lick
you mustn't lick
she mustn't lick
we mustn't lick
you mustn't lick
they mustn't lick 	I mustn't be licking
you mustn't be licking
she mustn't be licking
we mustn't be licking
you mustn't be licking
they mustn't be licking	I mustn't have licked
you mustn't have licked
she mustn't have licked
we mustn't have licked
you mustn't have licked
they mustn't have licked	I mustn't have been licking
you mustn't have been licking
she mustn't have been licking
we mustn't have been licking
you mustn't have been licking
they mustn't have been licking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I lick?
must you lick?
must she lick?
must we lick?
must you lick?
must they lick? 	must I be licking?
must you be licking?
must she be licking?
must we be licking?
must you be licking?
must they be licking? 	must I have licked?
must you have licked?
must she have licked?
must we have licked?
must you have licked?
must they have licked? 	must I have been licking?
must you have been licking?
must she have been licking?
must we have been licking?
must you have been licking?
must they have been licking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I lick?
mustn't you lick?
mustn't she lick?
mustn't we lick?
mustn't you lick?
mustn't they lick? 	mustn't I be licking?
mustn't you be licking?
mustn't she be licking?
mustn't we be licking?
mustn't you be licking?
mustn't they be licking? 	mustn't I have licked?
mustn't you have licked?
mustn't she have licked?
mustn't we have licked?
mustn't you have licked?
mustn't they have licked? 	mustn't I have been licking?
mustn't you have been licking?
mustn't she have been licking?
mustn't we have been licking?
mustn't you have been licking?
mustn't they have been licking?