must authorize
Regular verb: authorize - authorized- authorized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must authorize
you must authorize
he must authorize
we must authorize
you must authorize
they must authorize 	I must be authorizing
you must be authorizing
he must be authorizing
we must be authorizing
you must be authorizing
they must be authorizing	I must have authorized
you must have authorized
he must have authorized
we must have authorized
you must have authorized
they must have authorized	I must have been authorizing
you must have been authorizing
he must have been authorizing
we must have been authorizing
you must have been authorizing
they must have been authorizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not authorize
you must not authorize
he must not authorize
we must not authorize
you must not authorize
they must not authorize 	I must not be authorizing
you must not be authorizing
he must not be authorizing
we must not be authorizing
you must not be authorizing
they must not be authorizing	I must not have authorized
you must not have authorized
he must not have authorized
we must not have authorized
you must not have authorized
they must not have authorized	I must not have been authorizing
you must not have been authorizing
he must not have been authorizing
we must not have been authorizing
you must not have been authorizing
they must not have been authorizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I authorize?
must you authorize?
must he authorize?
must we authorize?
must you authorize?
must they authorize? 	must I be authorizing?
must you be authorizing?
must he be authorizing?
must we be authorizing?
must you be authorizing?
must they be authorizing? 	must I have authorized?
must you have authorized?
must he have authorized?
must we have authorized?
must you have authorized?
must they have authorized? 	must I have been authorizing?
must you have been authorizing?
must he have been authorizing?
must we have been authorizing?
must you have been authorizing?
must they have been authorizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not authorize?
must you not authorize?
must he not authorize?
must we not authorize?
must you not authorize?
must they not authorize? 	must I not be authorizing?
must you not be authorizing?
must he not be authorizing?
must we not be authorizing?
must you not be authorizing?
must they not be authorizing? 	must I not have authorized?
must you not have authorized?
must he not have authorized?
must we not have authorized?
must you not have authorized?
must they not have authorized? 	must I not have been authorizing?
must you not have been authorizing?
must he not have been authorizing?
must we not have been authorizing?
must you not have been authorizing?
must they not have been authorizing?