must subspecialise
Verbe régulier : subspecialise - subspecialised- subspecialised

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must subspecialise
you must subspecialise
he must subspecialise
we must subspecialise
you must subspecialise
they must subspecialise 	I must be subspecialising
you must be subspecialising
he must be subspecialising
we must be subspecialising
you must be subspecialising
they must be subspecialising	I must have subspecialised
you must have subspecialised
he must have subspecialised
we must have subspecialised
you must have subspecialised
they must have subspecialised	I must have been subspecialising
you must have been subspecialising
he must have been subspecialising
we must have been subspecialising
you must have been subspecialising
they must have been subspecialising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't subspecialise
you mustn't subspecialise
he mustn't subspecialise
we mustn't subspecialise
you mustn't subspecialise
they mustn't subspecialise 	I mustn't be subspecialising
you mustn't be subspecialising
he mustn't be subspecialising
we mustn't be subspecialising
you mustn't be subspecialising
they mustn't be subspecialising	I mustn't have subspecialised
you mustn't have subspecialised
he mustn't have subspecialised
we mustn't have subspecialised
you mustn't have subspecialised
they mustn't have subspecialised	I mustn't have been subspecialising
you mustn't have been subspecialising
he mustn't have been subspecialising
we mustn't have been subspecialising
you mustn't have been subspecialising
they mustn't have been subspecialising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I subspecialise?
must you subspecialise?
must he subspecialise?
must we subspecialise?
must you subspecialise?
must they subspecialise? 	must I be subspecialising?
must you be subspecialising?
must he be subspecialising?
must we be subspecialising?
must you be subspecialising?
must they be subspecialising? 	must I have subspecialised?
must you have subspecialised?
must he have subspecialised?
must we have subspecialised?
must you have subspecialised?
must they have subspecialised? 	must I have been subspecialising?
must you have been subspecialising?
must he have been subspecialising?
must we have been subspecialising?
must you have been subspecialising?
must they have been subspecialising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I subspecialise?
mustn't you subspecialise?
mustn't he subspecialise?
mustn't we subspecialise?
mustn't you subspecialise?
mustn't they subspecialise? 	mustn't I be subspecialising?
mustn't you be subspecialising?
mustn't he be subspecialising?
mustn't we be subspecialising?
mustn't you be subspecialising?
mustn't they be subspecialising? 	mustn't I have subspecialised?
mustn't you have subspecialised?
mustn't he have subspecialised?
mustn't we have subspecialised?
mustn't you have subspecialised?
mustn't they have subspecialised? 	mustn't I have been subspecialising?
mustn't you have been subspecialising?
mustn't he have been subspecialising?
mustn't we have been subspecialising?
mustn't you have been subspecialising?
mustn't they have been subspecialising?