must uncurl
Regular verb: uncurl - uncurled- uncurled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must uncurl
you must uncurl
he must uncurl
we must uncurl
you must uncurl
they must uncurl 	I must be uncurling
you must be uncurling
he must be uncurling
we must be uncurling
you must be uncurling
they must be uncurling	I must have uncurled
you must have uncurled
he must have uncurled
we must have uncurled
you must have uncurled
they must have uncurled	I must have been uncurling
you must have been uncurling
he must have been uncurling
we must have been uncurling
you must have been uncurling
they must have been uncurling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not uncurl
you must not uncurl
he must not uncurl
we must not uncurl
you must not uncurl
they must not uncurl 	I must not be uncurling
you must not be uncurling
he must not be uncurling
we must not be uncurling
you must not be uncurling
they must not be uncurling	I must not have uncurled
you must not have uncurled
he must not have uncurled
we must not have uncurled
you must not have uncurled
they must not have uncurled	I must not have been uncurling
you must not have been uncurling
he must not have been uncurling
we must not have been uncurling
you must not have been uncurling
they must not have been uncurling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I uncurl?
must you uncurl?
must he uncurl?
must we uncurl?
must you uncurl?
must they uncurl? 	must I be uncurling?
must you be uncurling?
must he be uncurling?
must we be uncurling?
must you be uncurling?
must they be uncurling? 	must I have uncurled?
must you have uncurled?
must he have uncurled?
must we have uncurled?
must you have uncurled?
must they have uncurled? 	must I have been uncurling?
must you have been uncurling?
must he have been uncurling?
must we have been uncurling?
must you have been uncurling?
must they have been uncurling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not uncurl?
must you not uncurl?
must he not uncurl?
must we not uncurl?
must you not uncurl?
must they not uncurl? 	must I not be uncurling?
must you not be uncurling?
must he not be uncurling?
must we not be uncurling?
must you not be uncurling?
must they not be uncurling? 	must I not have uncurled?
must you not have uncurled?
must he not have uncurled?
must we not have uncurled?
must you not have uncurled?
must they not have uncurled? 	must I not have been uncurling?
must you not have been uncurling?
must he not have been uncurling?
must we not have been uncurling?
must you not have been uncurling?
must they not have been uncurling?