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