must specify
Regular verb: specify - specified- specified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must specify
you must specify
he must specify
we must specify
you must specify
they must specify 	I must be specifying
you must be specifying
he must be specifying
we must be specifying
you must be specifying
they must be specifying	I must have specified
you must have specified
he must have specified
we must have specified
you must have specified
they must have specified	I must have been specifying
you must have been specifying
he must have been specifying
we must have been specifying
you must have been specifying
they must have been specifying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't specify
you mustn't specify
he mustn't specify
we mustn't specify
you mustn't specify
they mustn't specify 	I mustn't be specifying
you mustn't be specifying
he mustn't be specifying
we mustn't be specifying
you mustn't be specifying
they mustn't be specifying	I mustn't have specified
you mustn't have specified
he mustn't have specified
we mustn't have specified
you mustn't have specified
they mustn't have specified	I mustn't have been specifying
you mustn't have been specifying
he mustn't have been specifying
we mustn't have been specifying
you mustn't have been specifying
they mustn't have been specifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I specify?
must you specify?
must he specify?
must we specify?
must you specify?
must they specify? 	must I be specifying?
must you be specifying?
must he be specifying?
must we be specifying?
must you be specifying?
must they be specifying? 	must I have specified?
must you have specified?
must he have specified?
must we have specified?
must you have specified?
must they have specified? 	must I have been specifying?
must you have been specifying?
must he have been specifying?
must we have been specifying?
must you have been specifying?
must they have been specifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I specify?
mustn't you specify?
mustn't he specify?
mustn't we specify?
mustn't you specify?
mustn't they specify? 	mustn't I be specifying?
mustn't you be specifying?
mustn't he be specifying?
mustn't we be specifying?
mustn't you be specifying?
mustn't they be specifying? 	mustn't I have specified?
mustn't you have specified?
mustn't he have specified?
mustn't we have specified?
mustn't you have specified?
mustn't they have specified? 	mustn't I have been specifying?
mustn't you have been specifying?
mustn't he have been specifying?
mustn't we have been specifying?
mustn't you have been specifying?
mustn't they have been specifying?