must apostrophize
Regular verb: apostrophize - apostrophized- apostrophized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must apostrophize
you must apostrophize
he must apostrophize
we must apostrophize
you must apostrophize
they must apostrophize 	I must be apostrophizing
you must be apostrophizing
he must be apostrophizing
we must be apostrophizing
you must be apostrophizing
they must be apostrophizing	I must have apostrophized
you must have apostrophized
he must have apostrophized
we must have apostrophized
you must have apostrophized
they must have apostrophized	I must have been apostrophizing
you must have been apostrophizing
he must have been apostrophizing
we must have been apostrophizing
you must have been apostrophizing
they must have been apostrophizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not apostrophize
you must not apostrophize
he must not apostrophize
we must not apostrophize
you must not apostrophize
they must not apostrophize 	I must not be apostrophizing
you must not be apostrophizing
he must not be apostrophizing
we must not be apostrophizing
you must not be apostrophizing
they must not be apostrophizing	I must not have apostrophized
you must not have apostrophized
he must not have apostrophized
we must not have apostrophized
you must not have apostrophized
they must not have apostrophized	I must not have been apostrophizing
you must not have been apostrophizing
he must not have been apostrophizing
we must not have been apostrophizing
you must not have been apostrophizing
they must not have been apostrophizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I apostrophize?
must you apostrophize?
must he apostrophize?
must we apostrophize?
must you apostrophize?
must they apostrophize? 	must I be apostrophizing?
must you be apostrophizing?
must he be apostrophizing?
must we be apostrophizing?
must you be apostrophizing?
must they be apostrophizing? 	must I have apostrophized?
must you have apostrophized?
must he have apostrophized?
must we have apostrophized?
must you have apostrophized?
must they have apostrophized? 	must I have been apostrophizing?
must you have been apostrophizing?
must he have been apostrophizing?
must we have been apostrophizing?
must you have been apostrophizing?
must they have been apostrophizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not apostrophize?
must you not apostrophize?
must he not apostrophize?
must we not apostrophize?
must you not apostrophize?
must they not apostrophize? 	must I not be apostrophizing?
must you not be apostrophizing?
must he not be apostrophizing?
must we not be apostrophizing?
must you not be apostrophizing?
must they not be apostrophizing? 	must I not have apostrophized?
must you not have apostrophized?
must he not have apostrophized?
must we not have apostrophized?
must you not have apostrophized?
must they not have apostrophized? 	must I not have been apostrophizing?
must you not have been apostrophizing?
must he not have been apostrophizing?
must we not have been apostrophizing?
must you not have been apostrophizing?
must they not have been apostrophizing?