must specialize
Verbe régulier : specialize - specialized- specialized
Traduction française : se spécialiser 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must specialize
you must specialize
she must specialize
we must specialize
you must specialize
they must specialize 	I must be specializing
you must be specializing
she must be specializing
we must be specializing
you must be specializing
they must be specializing	I must have specialized
you must have specialized
she must have specialized
we must have specialized
you must have specialized
they must have specialized	I must have been specializing
you must have been specializing
she must have been specializing
we must have been specializing
you must have been specializing
they must have been specializing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't specialize
you mustn't specialize
she mustn't specialize
we mustn't specialize
you mustn't specialize
they mustn't specialize 	I mustn't be specializing
you mustn't be specializing
she mustn't be specializing
we mustn't be specializing
you mustn't be specializing
they mustn't be specializing	I mustn't have specialized
you mustn't have specialized
she mustn't have specialized
we mustn't have specialized
you mustn't have specialized
they mustn't have specialized	I mustn't have been specializing
you mustn't have been specializing
she mustn't have been specializing
we mustn't have been specializing
you mustn't have been specializing
they mustn't have been specializing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I specialize?
must you specialize?
must she specialize?
must we specialize?
must you specialize?
must they specialize? 	must I be specializing?
must you be specializing?
must she be specializing?
must we be specializing?
must you be specializing?
must they be specializing? 	must I have specialized?
must you have specialized?
must she have specialized?
must we have specialized?
must you have specialized?
must they have specialized? 	must I have been specializing?
must you have been specializing?
must she have been specializing?
must we have been specializing?
must you have been specializing?
must they have been specializing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I specialize?
mustn't you specialize?
mustn't she specialize?
mustn't we specialize?
mustn't you specialize?
mustn't they specialize? 	mustn't I be specializing?
mustn't you be specializing?
mustn't she be specializing?
mustn't we be specializing?
mustn't you be specializing?
mustn't they be specializing? 	mustn't I have specialized?
mustn't you have specialized?
mustn't she have specialized?
mustn't we have specialized?
mustn't you have specialized?
mustn't they have specialized? 	mustn't I have been specializing?
mustn't you have been specializing?
mustn't she have been specializing?
mustn't we have been specializing?
mustn't you have been specializing?
mustn't they have been specializing?