must tick
Regular verb: tick - ticked- ticked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must tick
you must tick
he must tick
we must tick
you must tick
they must tick 	I must be ticking
you must be ticking
he must be ticking
we must be ticking
you must be ticking
they must be ticking	I must have ticked
you must have ticked
he must have ticked
we must have ticked
you must have ticked
they must have ticked	I must have been ticking
you must have been ticking
he must have been ticking
we must have been ticking
you must have been ticking
they must have been ticking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't tick
you mustn't tick
he mustn't tick
we mustn't tick
you mustn't tick
they mustn't tick 	I mustn't be ticking
you mustn't be ticking
he mustn't be ticking
we mustn't be ticking
you mustn't be ticking
they mustn't be ticking	I mustn't have ticked
you mustn't have ticked
he mustn't have ticked
we mustn't have ticked
you mustn't have ticked
they mustn't have ticked	I mustn't have been ticking
you mustn't have been ticking
he mustn't have been ticking
we mustn't have been ticking
you mustn't have been ticking
they mustn't have been ticking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I tick?
must you tick?
must he tick?
must we tick?
must you tick?
must they tick? 	must I be ticking?
must you be ticking?
must he be ticking?
must we be ticking?
must you be ticking?
must they be ticking? 	must I have ticked?
must you have ticked?
must he have ticked?
must we have ticked?
must you have ticked?
must they have ticked? 	must I have been ticking?
must you have been ticking?
must he have been ticking?
must we have been ticking?
must you have been ticking?
must they have been ticking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I tick?
mustn't you tick?
mustn't he tick?
mustn't we tick?
mustn't you tick?
mustn't they tick? 	mustn't I be ticking?
mustn't you be ticking?
mustn't he be ticking?
mustn't we be ticking?
mustn't you be ticking?
mustn't they be ticking? 	mustn't I have ticked?
mustn't you have ticked?
mustn't he have ticked?
mustn't we have ticked?
mustn't you have ticked?
mustn't they have ticked? 	mustn't I have been ticking?
mustn't you have been ticking?
mustn't he have been ticking?
mustn't we have been ticking?
mustn't you have been ticking?
mustn't they have been ticking?