must singe
Verbe régulier : singe - singed- singed
Traduction française : brûler légèrement - roussir 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must singe
you must singe
he must singe
we must singe
you must singe
they must singe 	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 singed
you must have singed
he must have singed
we must have singed
you must have singed
they must have singed	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 mustn't singe
you mustn't singe
he mustn't singe
we mustn't singe
you mustn't singe
they mustn't singe 	I mustn't be singing
you mustn't be singing
he mustn't be singing
we mustn't be singing
you mustn't be singing
they mustn't be singing	I mustn't have singed
you mustn't have singed
he mustn't have singed
we mustn't have singed
you mustn't have singed
they mustn't have singed	I mustn't have been singing
you mustn't have been singing
he mustn't have been singing
we mustn't have been singing
you mustn't have been singing
they mustn't have been singing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I singe?
must you singe?
must he singe?
must we singe?
must you singe?
must they singe? 	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 singed?
must you have singed?
must he have singed?
must we have singed?
must you have singed?
must they have singed? 	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 	
mustn't I singe?
mustn't you singe?
mustn't he singe?
mustn't we singe?
mustn't you singe?
mustn't they singe? 	mustn't I be singing?
mustn't you be singing?
mustn't he be singing?
mustn't we be singing?
mustn't you be singing?
mustn't they be singing? 	mustn't I have singed?
mustn't you have singed?
mustn't he have singed?
mustn't we have singed?
mustn't you have singed?
mustn't they have singed? 	mustn't I have been singing?
mustn't you have been singing?
mustn't he have been singing?
mustn't we have been singing?
mustn't you have been singing?
mustn't they have been singing?