must define
Verbe régulier : define - defined- defined
Traduction française : définir - délimiter 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must define
you must define
she must define
we must define
you must define
they must define 	I must be defining
you must be defining
she must be defining
we must be defining
you must be defining
they must be defining	I must have defined
you must have defined
she must have defined
we must have defined
you must have defined
they must have defined	I must have been defining
you must have been defining
she must have been defining
we must have been defining
you must have been defining
they must have been defining	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't define
you mustn't define
she mustn't define
we mustn't define
you mustn't define
they mustn't define 	I mustn't be defining
you mustn't be defining
she mustn't be defining
we mustn't be defining
you mustn't be defining
they mustn't be defining	I mustn't have defined
you mustn't have defined
she mustn't have defined
we mustn't have defined
you mustn't have defined
they mustn't have defined	I mustn't have been defining
you mustn't have been defining
she mustn't have been defining
we mustn't have been defining
you mustn't have been defining
they mustn't have been defining	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I define?
must you define?
must she define?
must we define?
must you define?
must they define? 	must I be defining?
must you be defining?
must she be defining?
must we be defining?
must you be defining?
must they be defining? 	must I have defined?
must you have defined?
must she have defined?
must we have defined?
must you have defined?
must they have defined? 	must I have been defining?
must you have been defining?
must she have been defining?
must we have been defining?
must you have been defining?
must they have been defining? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I define?
mustn't you define?
mustn't she define?
mustn't we define?
mustn't you define?
mustn't they define? 	mustn't I be defining?
mustn't you be defining?
mustn't she be defining?
mustn't we be defining?
mustn't you be defining?
mustn't they be defining? 	mustn't I have defined?
mustn't you have defined?
mustn't she have defined?
mustn't we have defined?
mustn't you have defined?
mustn't they have defined? 	mustn't I have been defining?
mustn't you have been defining?
mustn't she have been defining?
mustn't we have been defining?
mustn't you have been defining?
mustn't they have been defining?