must unlock
Regular verb: unlock - unlocked- unlocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unlock
you must unlock
he must unlock
we must unlock
you must unlock
they must unlock 	I must be unlocking
you must be unlocking
he must be unlocking
we must be unlocking
you must be unlocking
they must be unlocking	I must have unlocked
you must have unlocked
he must have unlocked
we must have unlocked
you must have unlocked
they must have unlocked	I must have been unlocking
you must have been unlocking
he must have been unlocking
we must have been unlocking
you must have been unlocking
they must have been unlocking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not unlock
you must not unlock
he must not unlock
we must not unlock
you must not unlock
they must not unlock 	I must not be unlocking
you must not be unlocking
he must not be unlocking
we must not be unlocking
you must not be unlocking
they must not be unlocking	I must not have unlocked
you must not have unlocked
he must not have unlocked
we must not have unlocked
you must not have unlocked
they must not have unlocked	I must not have been unlocking
you must not have been unlocking
he must not have been unlocking
we must not have been unlocking
you must not have been unlocking
they must not have been unlocking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unlock?
must you unlock?
must he unlock?
must we unlock?
must you unlock?
must they unlock? 	must I be unlocking?
must you be unlocking?
must he be unlocking?
must we be unlocking?
must you be unlocking?
must they be unlocking? 	must I have unlocked?
must you have unlocked?
must he have unlocked?
must we have unlocked?
must you have unlocked?
must they have unlocked? 	must I have been unlocking?
must you have been unlocking?
must he have been unlocking?
must we have been unlocking?
must you have been unlocking?
must they have been unlocking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not unlock?
must you not unlock?
must he not unlock?
must we not unlock?
must you not unlock?
must they not unlock? 	must I not be unlocking?
must you not be unlocking?
must he not be unlocking?
must we not be unlocking?
must you not be unlocking?
must they not be unlocking? 	must I not have unlocked?
must you not have unlocked?
must he not have unlocked?
must we not have unlocked?
must you not have unlocked?
must they not have unlocked? 	must I not have been unlocking?
must you not have been unlocking?
must he not have been unlocking?
must we not have been unlocking?
must you not have been unlocking?
must they not have been unlocking?