English verb conjugation
MUST RUE

Regular verb: rue - rued - rued

Affirmation

Simple form	V-ing form
I must rue you must rue he must rue we must rue you must rue they must rue	I must be ruing you must be ruing he must be ruing we must be ruing you must be ruing they must be ruing
Perfect	V-ing perfect
I must have rued you must have rued he must have rued we must have rued you must have rued they must have rued	I must have been ruing you must have been ruing he must have been ruing we must have been ruing you must have been ruing they must have been ruing

Negation

Simple form	V-ing form
I mustn't rue you mustn't rue he mustn't rue we mustn't rue you mustn't rue they mustn't rue	I mustn't be ruing you mustn't be ruing he mustn't be ruing we mustn't be ruing you mustn't be ruing they mustn't be ruing
Perfect	V-ing perfect
I mustn't have rued you mustn't have rued he mustn't have rued we mustn't have rued you mustn't have rued they mustn't have rued	I mustn't have been ruing you mustn't have been ruing he mustn't have been ruing we mustn't have been ruing you mustn't have been ruing they mustn't have been ruing

Interrogative form

Simple form	V-ing form
must I rue? must you rue? must he rue? must we rue? must you rue? must they rue?	must I be ruing? must you be ruing? must he be ruing? must we be ruing? must you be ruing? must they be ruing?
Perfect	V-ing perfect
must I have rued? must you have rued? must he have rued? must we have rued? must you have rued? must they have rued?	must I have been ruing? must you have been ruing? must he have been ruing? must we have been ruing? must you have been ruing? must they have been ruing?

Interro-negative form

Simple form	V-ing form
mustn't I rue? mustn't you rue? mustn't he rue? mustn't we rue? mustn't you rue? mustn't they rue?	mustn't I be ruing? mustn't you be ruing? mustn't he be ruing? mustn't we be ruing? mustn't you be ruing? mustn't they be ruing?
Perfect	V-ing perfect
mustn't I have rued? mustn't you have rued? mustn't he have rued? mustn't we have rued? mustn't you have rued? mustn't they have rued?	mustn't I have been ruing? mustn't you have been ruing? mustn't he have been ruing? mustn't we have been ruing? mustn't you have been ruing? mustn't they have been ruing?