must unclamp
Regular verb: unclamp - unclamped- unclamped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unclamp
you must unclamp
he must unclamp
we must unclamp
you must unclamp
they must unclamp 	I must be unclamping
you must be unclamping
he must be unclamping
we must be unclamping
you must be unclamping
they must be unclamping	I must have unclamped
you must have unclamped
he must have unclamped
we must have unclamped
you must have unclamped
they must have unclamped	I must have been unclamping
you must have been unclamping
he must have been unclamping
we must have been unclamping
you must have been unclamping
they must have been unclamping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not unclamp
you must not unclamp
he must not unclamp
we must not unclamp
you must not unclamp
they must not unclamp 	I must not be unclamping
you must not be unclamping
he must not be unclamping
we must not be unclamping
you must not be unclamping
they must not be unclamping	I must not have unclamped
you must not have unclamped
he must not have unclamped
we must not have unclamped
you must not have unclamped
they must not have unclamped	I must not have been unclamping
you must not have been unclamping
he must not have been unclamping
we must not have been unclamping
you must not have been unclamping
they must not have been unclamping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unclamp?
must you unclamp?
must he unclamp?
must we unclamp?
must you unclamp?
must they unclamp? 	must I be unclamping?
must you be unclamping?
must he be unclamping?
must we be unclamping?
must you be unclamping?
must they be unclamping? 	must I have unclamped?
must you have unclamped?
must he have unclamped?
must we have unclamped?
must you have unclamped?
must they have unclamped? 	must I have been unclamping?
must you have been unclamping?
must he have been unclamping?
must we have been unclamping?
must you have been unclamping?
must they have been unclamping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not unclamp?
must you not unclamp?
must he not unclamp?
must we not unclamp?
must you not unclamp?
must they not unclamp? 	must I not be unclamping?
must you not be unclamping?
must he not be unclamping?
must we not be unclamping?
must you not be unclamping?
must they not be unclamping? 	must I not have unclamped?
must you not have unclamped?
must he not have unclamped?
must we not have unclamped?
must you not have unclamped?
must they not have unclamped? 	must I not have been unclamping?
must you not have been unclamping?
must he not have been unclamping?
must we not have been unclamping?
must you not have been unclamping?
must they not have been unclamping?