could upswing
Irregular verb: upswing - upswung- upswung

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could upswing
you could upswing
he could upswing
we could upswing
you could upswing
they could upswing 	I could be upswinging
you could be upswinging
he could be upswinging
we could be upswinging
you could be upswinging
they could be upswinging	I could have upswung
you could have upswung
he could have upswung
we could have upswung
you could have upswung
they could have upswung	I could have been upswinging
you could have been upswinging
he could have been upswinging
we could have been upswinging
you could have been upswinging
they could have been upswinging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't upswing
you couldn't upswing
he couldn't upswing
we couldn't upswing
you couldn't upswing
they couldn't upswing 	I couldn't be upswinging
you couldn't be upswinging
he couldn't be upswinging
we couldn't be upswinging
you couldn't be upswinging
they couldn't be upswinging	I couldn't have upswung
you couldn't have upswung
he couldn't have upswung
we couldn't have upswung
you couldn't have upswung
they couldn't have upswung	I couldn't have been upswinging
you couldn't have been upswinging
he couldn't have been upswinging
we couldn't have been upswinging
you couldn't have been upswinging
they couldn't have been upswinging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I upswing?
could you upswing?
could he upswing?
could we upswing?
could you upswing?
could they upswing? 	could I be upswinging?
could you be upswinging?
could he be upswinging?
could we be upswinging?
could you be upswinging?
could they be upswinging? 	could I have upswung?
could you have upswung?
could he have upswung?
could we have upswung?
could you have upswung?
could they have upswung? 	could I have been upswinging?
could you have been upswinging?
could he have been upswinging?
could we have been upswinging?
could you have been upswinging?
could they have been upswinging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I upswing?
couldn't you upswing?
couldn't he upswing?
couldn't we upswing?
couldn't you upswing?
couldn't they upswing? 	couldn't I be upswinging?
couldn't you be upswinging?
couldn't he be upswinging?
couldn't we be upswinging?
couldn't you be upswinging?
couldn't they be upswinging? 	couldn't I have upswung?
couldn't you have upswung?
couldn't he have upswung?
couldn't we have upswung?
couldn't you have upswung?
couldn't they have upswung? 	couldn't I have been upswinging?
couldn't you have been upswinging?
couldn't he have been upswinging?
couldn't we have been upswinging?
couldn't you have been upswinging?
couldn't they have been upswinging?