must spring
Verbe irrégulier : spring - sprang, sprung- sprung
Traduction française : jaillir - bondir 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must spring
you must spring
he must spring
we must spring
you must spring
they must spring 	I must be springing
you must be springing
he must be springing
we must be springing
you must be springing
they must be springing	I must have sprung
you must have sprung
he must have sprung
we must have sprung
you must have sprung
they must have sprung	I must have been springing
you must have been springing
he must have been springing
we must have been springing
you must have been springing
they must have been springing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't spring
you mustn't spring
he mustn't spring
we mustn't spring
you mustn't spring
they mustn't spring 	I mustn't be springing
you mustn't be springing
he mustn't be springing
we mustn't be springing
you mustn't be springing
they mustn't be springing	I mustn't have sprung
you mustn't have sprung
he mustn't have sprung
we mustn't have sprung
you mustn't have sprung
they mustn't have sprung	I mustn't have been springing
you mustn't have been springing
he mustn't have been springing
we mustn't have been springing
you mustn't have been springing
they mustn't have been springing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I spring?
must you spring?
must he spring?
must we spring?
must you spring?
must they spring? 	must I be springing?
must you be springing?
must he be springing?
must we be springing?
must you be springing?
must they be springing? 	must I have sprung?
must you have sprung?
must he have sprung?
must we have sprung?
must you have sprung?
must they have sprung? 	must I have been springing?
must you have been springing?
must he have been springing?
must we have been springing?
must you have been springing?
must they have been springing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I spring?
mustn't you spring?
mustn't he spring?
mustn't we spring?
mustn't you spring?
mustn't they spring? 	mustn't I be springing?
mustn't you be springing?
mustn't he be springing?
mustn't we be springing?
mustn't you be springing?
mustn't they be springing? 	mustn't I have sprung?
mustn't you have sprung?
mustn't he have sprung?
mustn't we have sprung?
mustn't you have sprung?
mustn't they have sprung? 	mustn't I have been springing?
mustn't you have been springing?
mustn't he have been springing?
mustn't we have been springing?
mustn't you have been springing?
mustn't they have been springing?