must sing
Verbe irrégulier : sing - sang- sung
Traduction française : chanter 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must sing
you must sing
he must sing
we must sing
you must sing
they must sing 	I must be singing
you must be singing
he must be singing
we must be singing
you must be singing
they must be singing	I must have sung
you must have sung
he must have sung
we must have sung
you must have sung
they must have sung	I must have been singing
you must have been singing
he must have been singing
we must have been singing
you must have been singing
they must have been singing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not sing
you must not sing
he must not sing
we must not sing
you must not sing
they must not sing 	I must not be singing
you must not be singing
he must not be singing
we must not be singing
you must not be singing
they must not be singing	I must not have sung
you must not have sung
he must not have sung
we must not have sung
you must not have sung
they must not have sung	I must not have been singing
you must not have been singing
he must not have been singing
we must not have been singing
you must not have been singing
they must not have been singing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I sing?
must you sing?
must he sing?
must we sing?
must you sing?
must they sing? 	must I be singing?
must you be singing?
must he be singing?
must we be singing?
must you be singing?
must they be singing? 	must I have sung?
must you have sung?
must he have sung?
must we have sung?
must you have sung?
must they have sung? 	must I have been singing?
must you have been singing?
must he have been singing?
must we have been singing?
must you have been singing?
must they have been singing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not sing?
must you not sing?
must he not sing?
must we not sing?
must you not sing?
must they not sing? 	must I not be singing?
must you not be singing?
must he not be singing?
must we not be singing?
must you not be singing?
must they not be singing? 	must I not have sung?
must you not have sung?
must he not have sung?
must we not have sung?
must you not have sung?
must they not have sung? 	must I not have been singing?
must you not have been singing?
must he not have been singing?
must we not have been singing?
must you not have been singing?
must they not have been singing?