English verb conjugation
MUST EXERT

Regular verb: exert - exerted - exerted

Affirmation

Simple form	V-ing form
I must exert you must exert he must exert we must exert you must exert they must exert	I must be exerting you must be exerting he must be exerting we must be exerting you must be exerting they must be exerting
Perfect	V-ing perfect
I must have exerted you must have exerted he must have exerted we must have exerted you must have exerted they must have exerted	I must have been exerting you must have been exerting he must have been exerting we must have been exerting you must have been exerting they must have been exerting

Negation

Simple form	V-ing form
I mustn't exert you mustn't exert he mustn't exert we mustn't exert you mustn't exert they mustn't exert	I mustn't be exerting you mustn't be exerting he mustn't be exerting we mustn't be exerting you mustn't be exerting they mustn't be exerting
Perfect	V-ing perfect
I mustn't have exerted you mustn't have exerted he mustn't have exerted we mustn't have exerted you mustn't have exerted they mustn't have exerted	I mustn't have been exerting you mustn't have been exerting he mustn't have been exerting we mustn't have been exerting you mustn't have been exerting they mustn't have been exerting

Interrogative form

Simple form	V-ing form
must I exert? must you exert? must he exert? must we exert? must you exert? must they exert?	must I be exerting? must you be exerting? must he be exerting? must we be exerting? must you be exerting? must they be exerting?
Perfect	V-ing perfect
must I have exerted? must you have exerted? must he have exerted? must we have exerted? must you have exerted? must they have exerted?	must I have been exerting? must you have been exerting? must he have been exerting? must we have been exerting? must you have been exerting? must they have been exerting?

Interro-negative form

Simple form	V-ing form
mustn't I exert? mustn't you exert? mustn't he exert? mustn't we exert? mustn't you exert? mustn't they exert?	mustn't I be exerting? mustn't you be exerting? mustn't he be exerting? mustn't we be exerting? mustn't you be exerting? mustn't they be exerting?
Perfect	V-ing perfect
mustn't I have exerted? mustn't you have exerted? mustn't he have exerted? mustn't we have exerted? mustn't you have exerted? mustn't they have exerted?	mustn't I have been exerting? mustn't you have been exerting? mustn't he have been exerting? mustn't we have been exerting? mustn't you have been exerting? mustn't they have been exerting?