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 mustn't upright
you mustn't upright
he mustn't upright
we mustn't upright
you mustn't upright
they mustn't upright 	I mustn't be uprighting
you mustn't be uprighting
he mustn't be uprighting
we mustn't be uprighting
you mustn't be uprighting
they mustn't be uprighting	I mustn't have uprighted
you mustn't have uprighted
he mustn't have uprighted
we mustn't have uprighted
you mustn't have uprighted
they mustn't have uprighted	I mustn't have been uprighting
you mustn't have been uprighting
he mustn't have been uprighting
we mustn't have been uprighting
you mustn't have been uprighting
they mustn't 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 	
mustn't I upright?
mustn't you upright?
mustn't he upright?
mustn't we upright?
mustn't you upright?
mustn't they upright? 	mustn't I be uprighting?
mustn't you be uprighting?
mustn't he be uprighting?
mustn't we be uprighting?
mustn't you be uprighting?
mustn't they be uprighting? 	mustn't I have uprighted?
mustn't you have uprighted?
mustn't he have uprighted?
mustn't we have uprighted?
mustn't you have uprighted?
mustn't they have uprighted? 	mustn't I have been uprighting?
mustn't you have been uprighting?
mustn't he have been uprighting?
mustn't we have been uprighting?
mustn't you have been uprighting?
mustn't they have been uprighting?