must tick
Regular verb: tick - ticked- ticked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must tick
you must tick
she must tick
we must tick
you must tick
they must tick 	I must be ticking
you must be ticking
she must be ticking
we must be ticking
you must be ticking
they must be ticking	I must have ticked
you must have ticked
she 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
she 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 must not tick
you must not tick
she must not tick
we must not tick
you must not tick
they must not tick 	I must not be ticking
you must not be ticking
she must not be ticking
we must not be ticking
you must not be ticking
they must not be ticking	I must not have ticked
you must not have ticked
she must not have ticked
we must not have ticked
you must not have ticked
they must not have ticked	I must not have been ticking
you must not have been ticking
she must not have been ticking
we must not have been ticking
you must not have been ticking
they must not have been ticking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I tick?
must you tick?
must she tick?
must we tick?
must you tick?
must they tick? 	must I be ticking?
must you be ticking?
must she be ticking?
must we be ticking?
must you be ticking?
must they be ticking? 	must I have ticked?
must you have ticked?
must she 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 she 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 	
must I not tick?
must you not tick?
must she not tick?
must we not tick?
must you not tick?
must they not tick? 	must I not be ticking?
must you not be ticking?
must she not be ticking?
must we not be ticking?
must you not be ticking?
must they not be ticking? 	must I not have ticked?
must you not have ticked?
must she not have ticked?
must we not have ticked?
must you not have ticked?
must they not have ticked? 	must I not have been ticking?
must you not have been ticking?
must she not have been ticking?
must we not have been ticking?
must you not have been ticking?
must they not have been ticking?