English verb conjugation
MUST UNCURL

Regular verb: uncurl - uncurled - uncurled

Affirmation

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