could upspring
Verbe irrégulier : upspring - upsprang, upsprung- upsprung

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could upspring
you could upspring
she could upspring
we could upspring
you could upspring
they could upspring 	I could be upspringing
you could be upspringing
she could be upspringing
we could be upspringing
you could be upspringing
they could be upspringing	I could have upsprung
you could have upsprung
she could have upsprung
we could have upsprung
you could have upsprung
they could have upsprung	I could have been upspringing
you could have been upspringing
she could have been upspringing
we could have been upspringing
you could have been upspringing
they could have been upspringing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't upspring
you couldn't upspring
she couldn't upspring
we couldn't upspring
you couldn't upspring
they couldn't upspring 	I couldn't be upspringing
you couldn't be upspringing
she couldn't be upspringing
we couldn't be upspringing
you couldn't be upspringing
they couldn't be upspringing	I couldn't have upsprung
you couldn't have upsprung
she couldn't have upsprung
we couldn't have upsprung
you couldn't have upsprung
they couldn't have upsprung	I couldn't have been upspringing
you couldn't have been upspringing
she couldn't have been upspringing
we couldn't have been upspringing
you couldn't have been upspringing
they couldn't have been upspringing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I upspring?
could you upspring?
could she upspring?
could we upspring?
could you upspring?
could they upspring? 	could I be upspringing?
could you be upspringing?
could she be upspringing?
could we be upspringing?
could you be upspringing?
could they be upspringing? 	could I have upsprung?
could you have upsprung?
could she have upsprung?
could we have upsprung?
could you have upsprung?
could they have upsprung? 	could I have been upspringing?
could you have been upspringing?
could she have been upspringing?
could we have been upspringing?
could you have been upspringing?
could they have been upspringing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I upspring?
couldn't you upspring?
couldn't she upspring?
couldn't we upspring?
couldn't you upspring?
couldn't they upspring? 	couldn't I be upspringing?
couldn't you be upspringing?
couldn't she be upspringing?
couldn't we be upspringing?
couldn't you be upspringing?
couldn't they be upspringing? 	couldn't I have upsprung?
couldn't you have upsprung?
couldn't she have upsprung?
couldn't we have upsprung?
couldn't you have upsprung?
couldn't they have upsprung? 	couldn't I have been upspringing?
couldn't you have been upspringing?
couldn't she have been upspringing?
couldn't we have been upspringing?
couldn't you have been upspringing?
couldn't they have been upspringing?