must upgrade
Verbe régulier : upgrade - upgraded- upgraded
Traduction française : améliorer - passer à un système plus puissant 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must upgrade
you must upgrade
he must upgrade
we must upgrade
you must upgrade
they must upgrade 	I must be upgrading
you must be upgrading
he must be upgrading
we must be upgrading
you must be upgrading
they must be upgrading	I must have upgraded
you must have upgraded
he must have upgraded
we must have upgraded
you must have upgraded
they must have upgraded	I must have been upgrading
you must have been upgrading
he must have been upgrading
we must have been upgrading
you must have been upgrading
they must have been upgrading	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't upgrade
you mustn't upgrade
he mustn't upgrade
we mustn't upgrade
you mustn't upgrade
they mustn't upgrade 	I mustn't be upgrading
you mustn't be upgrading
he mustn't be upgrading
we mustn't be upgrading
you mustn't be upgrading
they mustn't be upgrading	I mustn't have upgraded
you mustn't have upgraded
he mustn't have upgraded
we mustn't have upgraded
you mustn't have upgraded
they mustn't have upgraded	I mustn't have been upgrading
you mustn't have been upgrading
he mustn't have been upgrading
we mustn't have been upgrading
you mustn't have been upgrading
they mustn't have been upgrading	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I upgrade?
must you upgrade?
must he upgrade?
must we upgrade?
must you upgrade?
must they upgrade? 	must I be upgrading?
must you be upgrading?
must he be upgrading?
must we be upgrading?
must you be upgrading?
must they be upgrading? 	must I have upgraded?
must you have upgraded?
must he have upgraded?
must we have upgraded?
must you have upgraded?
must they have upgraded? 	must I have been upgrading?
must you have been upgrading?
must he have been upgrading?
must we have been upgrading?
must you have been upgrading?
must they have been upgrading? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I upgrade?
mustn't you upgrade?
mustn't he upgrade?
mustn't we upgrade?
mustn't you upgrade?
mustn't they upgrade? 	mustn't I be upgrading?
mustn't you be upgrading?
mustn't he be upgrading?
mustn't we be upgrading?
mustn't you be upgrading?
mustn't they be upgrading? 	mustn't I have upgraded?
mustn't you have upgraded?
mustn't he have upgraded?
mustn't we have upgraded?
mustn't you have upgraded?
mustn't they have upgraded? 	mustn't I have been upgrading?
mustn't you have been upgrading?
mustn't he have been upgrading?
mustn't we have been upgrading?
mustn't you have been upgrading?
mustn't they have been upgrading?