must obsolesce
Verbe régulier : obsolesce - obsolesced- obsolesced

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must obsolesce
you must obsolesce
she must obsolesce
we must obsolesce
you must obsolesce
they must obsolesce 	I must be obsolescing
you must be obsolescing
she must be obsolescing
we must be obsolescing
you must be obsolescing
they must be obsolescing	I must have obsolesced
you must have obsolesced
she must have obsolesced
we must have obsolesced
you must have obsolesced
they must have obsolesced	I must have been obsolescing
you must have been obsolescing
she must have been obsolescing
we must have been obsolescing
you must have been obsolescing
they must have been obsolescing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't obsolesce
you mustn't obsolesce
she mustn't obsolesce
we mustn't obsolesce
you mustn't obsolesce
they mustn't obsolesce 	I mustn't be obsolescing
you mustn't be obsolescing
she mustn't be obsolescing
we mustn't be obsolescing
you mustn't be obsolescing
they mustn't be obsolescing	I mustn't have obsolesced
you mustn't have obsolesced
she mustn't have obsolesced
we mustn't have obsolesced
you mustn't have obsolesced
they mustn't have obsolesced	I mustn't have been obsolescing
you mustn't have been obsolescing
she mustn't have been obsolescing
we mustn't have been obsolescing
you mustn't have been obsolescing
they mustn't have been obsolescing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I obsolesce?
must you obsolesce?
must she obsolesce?
must we obsolesce?
must you obsolesce?
must they obsolesce? 	must I be obsolescing?
must you be obsolescing?
must she be obsolescing?
must we be obsolescing?
must you be obsolescing?
must they be obsolescing? 	must I have obsolesced?
must you have obsolesced?
must she have obsolesced?
must we have obsolesced?
must you have obsolesced?
must they have obsolesced? 	must I have been obsolescing?
must you have been obsolescing?
must she have been obsolescing?
must we have been obsolescing?
must you have been obsolescing?
must they have been obsolescing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I obsolesce?
mustn't you obsolesce?
mustn't she obsolesce?
mustn't we obsolesce?
mustn't you obsolesce?
mustn't they obsolesce? 	mustn't I be obsolescing?
mustn't you be obsolescing?
mustn't she be obsolescing?
mustn't we be obsolescing?
mustn't you be obsolescing?
mustn't they be obsolescing? 	mustn't I have obsolesced?
mustn't you have obsolesced?
mustn't she have obsolesced?
mustn't we have obsolesced?
mustn't you have obsolesced?
mustn't they have obsolesced? 	mustn't I have been obsolescing?
mustn't you have been obsolescing?
mustn't she have been obsolescing?
mustn't we have been obsolescing?
mustn't you have been obsolescing?
mustn't they have been obsolescing?