must upright
Regular verb: upright - uprighted- uprighted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must upright
you must upright
he must upright
we must upright
you must upright
they must upright 	I must be uprighting
you must be uprighting
he must be uprighting
we must be uprighting
you must be uprighting
they must be uprighting	I must have uprighted
you must have uprighted
he must have uprighted
we must have uprighted
you must have uprighted
they must have uprighted	I must have been uprighting
you must have been uprighting
he must have been uprighting
we must have been uprighting
you must have been uprighting
they must have been uprighting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not upright
you must not upright
he must not upright
we must not upright
you must not upright
they must not upright 	I must not be uprighting
you must not be uprighting
he must not be uprighting
we must not be uprighting
you must not be uprighting
they must not be uprighting	I must not have uprighted
you must not have uprighted
he must not have uprighted
we must not have uprighted
you must not have uprighted
they must not have uprighted	I must not have been uprighting
you must not have been uprighting
he must not have been uprighting
we must not have been uprighting
you must not have been uprighting
they must not have been uprighting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I upright?
must you upright?
must he upright?
must we upright?
must you upright?
must they upright? 	must I be uprighting?
must you be uprighting?
must he be uprighting?
must we be uprighting?
must you be uprighting?
must they be uprighting? 	must I have uprighted?
must you have uprighted?
must he have uprighted?
must we have uprighted?
must you have uprighted?
must they have uprighted? 	must I have been uprighting?
must you have been uprighting?
must he have been uprighting?
must we have been uprighting?
must you have been uprighting?
must they have been uprighting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not upright?
must you not upright?
must he not upright?
must we not upright?
must you not upright?
must they not upright? 	must I not be uprighting?
must you not be uprighting?
must he not be uprighting?
must we not be uprighting?
must you not be uprighting?
must they not be uprighting? 	must I not have uprighted?
must you not have uprighted?
must he not have uprighted?
must we not have uprighted?
must you not have uprighted?
must they not have uprighted? 	must I not have been uprighting?
must you not have been uprighting?
must he not have been uprighting?
must we not have been uprighting?
must you not have been uprighting?
must they not have been uprighting?