must begin
Verbe irrégulier : begin - began- begun
Traduction française : commencer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must begin
you must begin
he must begin
we must begin
you must begin
they must begin 	I must be beginning
you must be beginning
he must be beginning
we must be beginning
you must be beginning
they must be beginning	I must have begun
you must have begun
he must have begun
we must have begun
you must have begun
they must have begun	I must have been beginning
you must have been beginning
he must have been beginning
we must have been beginning
you must have been beginning
they must have been beginning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not begin
you must not begin
he must not begin
we must not begin
you must not begin
they must not begin 	I must not be beginning
you must not be beginning
he must not be beginning
we must not be beginning
you must not be beginning
they must not be beginning	I must not have begun
you must not have begun
he must not have begun
we must not have begun
you must not have begun
they must not have begun	I must not have been beginning
you must not have been beginning
he must not have been beginning
we must not have been beginning
you must not have been beginning
they must not have been beginning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I begin?
must you begin?
must he begin?
must we begin?
must you begin?
must they begin? 	must I be beginning?
must you be beginning?
must he be beginning?
must we be beginning?
must you be beginning?
must they be beginning? 	must I have begun?
must you have begun?
must he have begun?
must we have begun?
must you have begun?
must they have begun? 	must I have been beginning?
must you have been beginning?
must he have been beginning?
must we have been beginning?
must you have been beginning?
must they have been beginning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not begin?
must you not begin?
must he not begin?
must we not begin?
must you not begin?
must they not begin? 	must I not be beginning?
must you not be beginning?
must he not be beginning?
must we not be beginning?
must you not be beginning?
must they not be beginning? 	must I not have begun?
must you not have begun?
must he not have begun?
must we not have begun?
must you not have begun?
must they not have begun? 	must I not have been beginning?
must you not have been beginning?
must he not have been beginning?
must we not have been beginning?
must you not have been beginning?
must they not have been beginning?