must specify
Regular verb: specify - specified- specified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must specify
you must specify
she must specify
we must specify
you must specify
they must specify 	I must be specifying
you must be specifying
she must be specifying
we must be specifying
you must be specifying
they must be specifying	I must have specified
you must have specified
she 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
she 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 must not specify
you must not specify
she must not specify
we must not specify
you must not specify
they must not specify 	I must not be specifying
you must not be specifying
she must not be specifying
we must not be specifying
you must not be specifying
they must not be specifying	I must not have specified
you must not have specified
she must not have specified
we must not have specified
you must not have specified
they must not have specified	I must not have been specifying
you must not have been specifying
she must not have been specifying
we must not have been specifying
you must not have been specifying
they must not have been specifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I specify?
must you specify?
must she specify?
must we specify?
must you specify?
must they specify? 	must I be specifying?
must you be specifying?
must she be specifying?
must we be specifying?
must you be specifying?
must they be specifying? 	must I have specified?
must you have specified?
must she 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 she 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 	
must I not specify?
must you not specify?
must she not specify?
must we not specify?
must you not specify?
must they not specify? 	must I not be specifying?
must you not be specifying?
must she not be specifying?
must we not be specifying?
must you not be specifying?
must they not be specifying? 	must I not have specified?
must you not have specified?
must she not have specified?
must we not have specified?
must you not have specified?
must they not have specified? 	must I not have been specifying?
must you not have been specifying?
must she not have been specifying?
must we not have been specifying?
must you not have been specifying?
must they not have been specifying?