must underbake
Verbe régulier : underbake - underbaked- underbaked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must underbake
you must underbake
he must underbake
we must underbake
you must underbake
they must underbake 	I must be underbaking
you must be underbaking
he must be underbaking
we must be underbaking
you must be underbaking
they must be underbaking	I must have underbaked
you must have underbaked
he must have underbaked
we must have underbaked
you must have underbaked
they must have underbaked	I must have been underbaking
you must have been underbaking
he must have been underbaking
we must have been underbaking
you must have been underbaking
they must have been underbaking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't underbake
you mustn't underbake
he mustn't underbake
we mustn't underbake
you mustn't underbake
they mustn't underbake 	I mustn't be underbaking
you mustn't be underbaking
he mustn't be underbaking
we mustn't be underbaking
you mustn't be underbaking
they mustn't be underbaking	I mustn't have underbaked
you mustn't have underbaked
he mustn't have underbaked
we mustn't have underbaked
you mustn't have underbaked
they mustn't have underbaked	I mustn't have been underbaking
you mustn't have been underbaking
he mustn't have been underbaking
we mustn't have been underbaking
you mustn't have been underbaking
they mustn't have been underbaking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I underbake?
must you underbake?
must he underbake?
must we underbake?
must you underbake?
must they underbake? 	must I be underbaking?
must you be underbaking?
must he be underbaking?
must we be underbaking?
must you be underbaking?
must they be underbaking? 	must I have underbaked?
must you have underbaked?
must he have underbaked?
must we have underbaked?
must you have underbaked?
must they have underbaked? 	must I have been underbaking?
must you have been underbaking?
must he have been underbaking?
must we have been underbaking?
must you have been underbaking?
must they have been underbaking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I underbake?
mustn't you underbake?
mustn't he underbake?
mustn't we underbake?
mustn't you underbake?
mustn't they underbake? 	mustn't I be underbaking?
mustn't you be underbaking?
mustn't he be underbaking?
mustn't we be underbaking?
mustn't you be underbaking?
mustn't they be underbaking? 	mustn't I have underbaked?
mustn't you have underbaked?
mustn't he have underbaked?
mustn't we have underbaked?
mustn't you have underbaked?
mustn't they have underbaked? 	mustn't I have been underbaking?
mustn't you have been underbaking?
mustn't he have been underbaking?
mustn't we have been underbaking?
mustn't you have been underbaking?
mustn't they have been underbaking?