must undereat
Verbe irrégulier : undereat - underate- undereaten

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must undereat
you must undereat
he must undereat
we must undereat
you must undereat
they must undereat 	I must be undereating
you must be undereating
he must be undereating
we must be undereating
you must be undereating
they must be undereating	I must have undereaten
you must have undereaten
he must have undereaten
we must have undereaten
you must have undereaten
they must have undereaten	I must have been undereating
you must have been undereating
he must have been undereating
we must have been undereating
you must have been undereating
they must have been undereating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't undereat
you mustn't undereat
he mustn't undereat
we mustn't undereat
you mustn't undereat
they mustn't undereat 	I mustn't be undereating
you mustn't be undereating
he mustn't be undereating
we mustn't be undereating
you mustn't be undereating
they mustn't be undereating	I mustn't have undereaten
you mustn't have undereaten
he mustn't have undereaten
we mustn't have undereaten
you mustn't have undereaten
they mustn't have undereaten	I mustn't have been undereating
you mustn't have been undereating
he mustn't have been undereating
we mustn't have been undereating
you mustn't have been undereating
they mustn't have been undereating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I undereat?
must you undereat?
must he undereat?
must we undereat?
must you undereat?
must they undereat? 	must I be undereating?
must you be undereating?
must he be undereating?
must we be undereating?
must you be undereating?
must they be undereating? 	must I have undereaten?
must you have undereaten?
must he have undereaten?
must we have undereaten?
must you have undereaten?
must they have undereaten? 	must I have been undereating?
must you have been undereating?
must he have been undereating?
must we have been undereating?
must you have been undereating?
must they have been undereating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I undereat?
mustn't you undereat?
mustn't he undereat?
mustn't we undereat?
mustn't you undereat?
mustn't they undereat? 	mustn't I be undereating?
mustn't you be undereating?
mustn't he be undereating?
mustn't we be undereating?
mustn't you be undereating?
mustn't they be undereating? 	mustn't I have undereaten?
mustn't you have undereaten?
mustn't he have undereaten?
mustn't we have undereaten?
mustn't you have undereaten?
mustn't they have undereaten? 	mustn't I have been undereating?
mustn't you have been undereating?
mustn't he have been undereating?
mustn't we have been undereating?
mustn't you have been undereating?
mustn't they have been undereating?