must upswing
Verbe irrégulier : upswing - upswung- upswung

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must upswing
you must upswing
she must upswing
we must upswing
you must upswing
they must upswing 	I must be upswinging
you must be upswinging
she must be upswinging
we must be upswinging
you must be upswinging
they must be upswinging	I must have upswung
you must have upswung
she must have upswung
we must have upswung
you must have upswung
they must have upswung	I must have been upswinging
you must have been upswinging
she must have been upswinging
we must have been upswinging
you must have been upswinging
they must have been upswinging	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't upswing
you mustn't upswing
she mustn't upswing
we mustn't upswing
you mustn't upswing
they mustn't upswing 	I mustn't be upswinging
you mustn't be upswinging
she mustn't be upswinging
we mustn't be upswinging
you mustn't be upswinging
they mustn't be upswinging	I mustn't have upswung
you mustn't have upswung
she mustn't have upswung
we mustn't have upswung
you mustn't have upswung
they mustn't have upswung	I mustn't have been upswinging
you mustn't have been upswinging
she mustn't have been upswinging
we mustn't have been upswinging
you mustn't have been upswinging
they mustn't have been upswinging	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I upswing?
must you upswing?
must she upswing?
must we upswing?
must you upswing?
must they upswing? 	must I be upswinging?
must you be upswinging?
must she be upswinging?
must we be upswinging?
must you be upswinging?
must they be upswinging? 	must I have upswung?
must you have upswung?
must she have upswung?
must we have upswung?
must you have upswung?
must they have upswung? 	must I have been upswinging?
must you have been upswinging?
must she have been upswinging?
must we have been upswinging?
must you have been upswinging?
must they have been upswinging? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I upswing?
mustn't you upswing?
mustn't she upswing?
mustn't we upswing?
mustn't you upswing?
mustn't they upswing? 	mustn't I be upswinging?
mustn't you be upswinging?
mustn't she be upswinging?
mustn't we be upswinging?
mustn't you be upswinging?
mustn't they be upswinging? 	mustn't I have upswung?
mustn't you have upswung?
mustn't she have upswung?
mustn't we have upswung?
mustn't you have upswung?
mustn't they have upswung? 	mustn't I have been upswinging?
mustn't you have been upswinging?
mustn't she have been upswinging?
mustn't we have been upswinging?
mustn't you have been upswinging?
mustn't they have been upswinging?