must form
Verbe régulier : form - formed- formed
Traduction française : former - se former 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must form
you must form
he must form
we must form
you must form
they must form 	I must be forming
you must be forming
he must be forming
we must be forming
you must be forming
they must be forming	I must have formed
you must have formed
he must have formed
we must have formed
you must have formed
they must have formed	I must have been forming
you must have been forming
he must have been forming
we must have been forming
you must have been forming
they must have been forming	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't form
you mustn't form
he mustn't form
we mustn't form
you mustn't form
they mustn't form 	I mustn't be forming
you mustn't be forming
he mustn't be forming
we mustn't be forming
you mustn't be forming
they mustn't be forming	I mustn't have formed
you mustn't have formed
he mustn't have formed
we mustn't have formed
you mustn't have formed
they mustn't have formed	I mustn't have been forming
you mustn't have been forming
he mustn't have been forming
we mustn't have been forming
you mustn't have been forming
they mustn't have been forming	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I form?
must you form?
must he form?
must we form?
must you form?
must they form? 	must I be forming?
must you be forming?
must he be forming?
must we be forming?
must you be forming?
must they be forming? 	must I have formed?
must you have formed?
must he have formed?
must we have formed?
must you have formed?
must they have formed? 	must I have been forming?
must you have been forming?
must he have been forming?
must we have been forming?
must you have been forming?
must they have been forming? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I form?
mustn't you form?
mustn't he form?
mustn't we form?
mustn't you form?
mustn't they form? 	mustn't I be forming?
mustn't you be forming?
mustn't he be forming?
mustn't we be forming?
mustn't you be forming?
mustn't they be forming? 	mustn't I have formed?
mustn't you have formed?
mustn't he have formed?
mustn't we have formed?
mustn't you have formed?
mustn't they have formed? 	mustn't I have been forming?
mustn't you have been forming?
mustn't he have been forming?
mustn't we have been forming?
mustn't you have been forming?
mustn't they have been forming?