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