must undeceive
Verbe régulier : undeceive - undeceived- undeceived

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must undeceive
you must undeceive
she must undeceive
we must undeceive
you must undeceive
they must undeceive 	I must be undeceiving
you must be undeceiving
she must be undeceiving
we must be undeceiving
you must be undeceiving
they must be undeceiving	I must have undeceived
you must have undeceived
she must have undeceived
we must have undeceived
you must have undeceived
they must have undeceived	I must have been undeceiving
you must have been undeceiving
she must have been undeceiving
we must have been undeceiving
you must have been undeceiving
they must have been undeceiving	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't undeceive
you mustn't undeceive
she mustn't undeceive
we mustn't undeceive
you mustn't undeceive
they mustn't undeceive 	I mustn't be undeceiving
you mustn't be undeceiving
she mustn't be undeceiving
we mustn't be undeceiving
you mustn't be undeceiving
they mustn't be undeceiving	I mustn't have undeceived
you mustn't have undeceived
she mustn't have undeceived
we mustn't have undeceived
you mustn't have undeceived
they mustn't have undeceived	I mustn't have been undeceiving
you mustn't have been undeceiving
she mustn't have been undeceiving
we mustn't have been undeceiving
you mustn't have been undeceiving
they mustn't have been undeceiving	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I undeceive?
must you undeceive?
must she undeceive?
must we undeceive?
must you undeceive?
must they undeceive? 	must I be undeceiving?
must you be undeceiving?
must she be undeceiving?
must we be undeceiving?
must you be undeceiving?
must they be undeceiving? 	must I have undeceived?
must you have undeceived?
must she have undeceived?
must we have undeceived?
must you have undeceived?
must they have undeceived? 	must I have been undeceiving?
must you have been undeceiving?
must she have been undeceiving?
must we have been undeceiving?
must you have been undeceiving?
must they have been undeceiving? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I undeceive?
mustn't you undeceive?
mustn't she undeceive?
mustn't we undeceive?
mustn't you undeceive?
mustn't they undeceive? 	mustn't I be undeceiving?
mustn't you be undeceiving?
mustn't she be undeceiving?
mustn't we be undeceiving?
mustn't you be undeceiving?
mustn't they be undeceiving? 	mustn't I have undeceived?
mustn't you have undeceived?
mustn't she have undeceived?
mustn't we have undeceived?
mustn't you have undeceived?
mustn't they have undeceived? 	mustn't I have been undeceiving?
mustn't you have been undeceiving?
mustn't she have been undeceiving?
mustn't we have been undeceiving?
mustn't you have been undeceiving?
mustn't they have been undeceiving?