could shadowbox
Verbe régulier : shadowbox - shadowboxed- shadowboxed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could shadowbox
you could shadowbox
he could shadowbox
we could shadowbox
you could shadowbox
they could shadowbox 	I could be shadowboxing
you could be shadowboxing
he could be shadowboxing
we could be shadowboxing
you could be shadowboxing
they could be shadowboxing	I could have shadowboxed
you could have shadowboxed
he could have shadowboxed
we could have shadowboxed
you could have shadowboxed
they could have shadowboxed	I could have been shadowboxing
you could have been shadowboxing
he could have been shadowboxing
we could have been shadowboxing
you could have been shadowboxing
they could have been shadowboxing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't shadowbox
you couldn't shadowbox
he couldn't shadowbox
we couldn't shadowbox
you couldn't shadowbox
they couldn't shadowbox 	I couldn't be shadowboxing
you couldn't be shadowboxing
he couldn't be shadowboxing
we couldn't be shadowboxing
you couldn't be shadowboxing
they couldn't be shadowboxing	I couldn't have shadowboxed
you couldn't have shadowboxed
he couldn't have shadowboxed
we couldn't have shadowboxed
you couldn't have shadowboxed
they couldn't have shadowboxed	I couldn't have been shadowboxing
you couldn't have been shadowboxing
he couldn't have been shadowboxing
we couldn't have been shadowboxing
you couldn't have been shadowboxing
they couldn't have been shadowboxing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I shadowbox?
could you shadowbox?
could he shadowbox?
could we shadowbox?
could you shadowbox?
could they shadowbox? 	could I be shadowboxing?
could you be shadowboxing?
could he be shadowboxing?
could we be shadowboxing?
could you be shadowboxing?
could they be shadowboxing? 	could I have shadowboxed?
could you have shadowboxed?
could he have shadowboxed?
could we have shadowboxed?
could you have shadowboxed?
could they have shadowboxed? 	could I have been shadowboxing?
could you have been shadowboxing?
could he have been shadowboxing?
could we have been shadowboxing?
could you have been shadowboxing?
could they have been shadowboxing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I shadowbox?
couldn't you shadowbox?
couldn't he shadowbox?
couldn't we shadowbox?
couldn't you shadowbox?
couldn't they shadowbox? 	couldn't I be shadowboxing?
couldn't you be shadowboxing?
couldn't he be shadowboxing?
couldn't we be shadowboxing?
couldn't you be shadowboxing?
couldn't they be shadowboxing? 	couldn't I have shadowboxed?
couldn't you have shadowboxed?
couldn't he have shadowboxed?
couldn't we have shadowboxed?
couldn't you have shadowboxed?
couldn't they have shadowboxed? 	couldn't I have been shadowboxing?
couldn't you have been shadowboxing?
couldn't he have been shadowboxing?
couldn't we have been shadowboxing?
couldn't you have been shadowboxing?
couldn't they have been shadowboxing?