Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must emprove sth you must emprove sth she must emprove sth we must emprove sth you must emprove sth they must emprove sth
V-ing form
I must be emprove sthing you must be emprove sthing she must be emprove sthing we must be emprove sthing you must be emprove sthing they must be emprove sthing
Perfect
I must have emprove sthed you must have emprove sthed she must have emprove sthed we must have emprove sthed you must have emprove sthed they must have emprove sthed
V-ing perfect
I must have been emprove sthing you must have been emprove sthing she must have been emprove sthing we must have been emprove sthing you must have been emprove sthing they must have been emprove sthing
Negation
Simple form
I mustn't emprove sth you mustn't emprove sth she mustn't emprove sth we mustn't emprove sth you mustn't emprove sth they mustn't emprove sth
V-ing form
I mustn't be emprove sthing you mustn't be emprove sthing she mustn't be emprove sthing we mustn't be emprove sthing you mustn't be emprove sthing they mustn't be emprove sthing
Perfect
I mustn't have emprove sthed you mustn't have emprove sthed she mustn't have emprove sthed we mustn't have emprove sthed you mustn't have emprove sthed they mustn't have emprove sthed
V-ing perfect
I mustn't have been emprove sthing you mustn't have been emprove sthing she mustn't have been emprove sthing we mustn't have been emprove sthing you mustn't have been emprove sthing they mustn't have been emprove sthing
Interrogative form
Simple form
must I emprove sth? must you emprove sth? must she emprove sth? must we emprove sth? must you emprove sth? must they emprove sth?
V-ing form
must I be emprove sthing? must you be emprove sthing? must she be emprove sthing? must we be emprove sthing? must you be emprove sthing? must they be emprove sthing?
Perfect
must I have emprove sthed? must you have emprove sthed? must she have emprove sthed? must we have emprove sthed? must you have emprove sthed? must they have emprove sthed?
V-ing perfect
must I have been emprove sthing? must you have been emprove sthing? must she have been emprove sthing? must we have been emprove sthing? must you have been emprove sthing? must they have been emprove sthing?
Interro-negative form
Simple form
mustn't I emprove sth? mustn't you emprove sth? mustn't she emprove sth? mustn't we emprove sth? mustn't you emprove sth? mustn't they emprove sth?
V-ing form
mustn't I be emprove sthing? mustn't you be emprove sthing? mustn't she be emprove sthing? mustn't we be emprove sthing? mustn't you be emprove sthing? mustn't they be emprove sthing?
Perfect
mustn't I have emprove sthed? mustn't you have emprove sthed? mustn't she have emprove sthed? mustn't we have emprove sthed? mustn't you have emprove sthed? mustn't they have emprove sthed?
V-ing perfect
mustn't I have been emprove sthing? mustn't you have been emprove sthing? mustn't she have been emprove sthing? mustn't we have been emprove sthing? mustn't you have been emprove sthing? mustn't they have been emprove sthing?