could unbox
Verbe régulier : unbox - unboxed- unboxed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could unbox
you could unbox
he could unbox
we could unbox
you could unbox
they could unbox 	I could be unboxing
you could be unboxing
he could be unboxing
we could be unboxing
you could be unboxing
they could be unboxing	I could have unboxed
you could have unboxed
he could have unboxed
we could have unboxed
you could have unboxed
they could have unboxed	I could have been unboxing
you could have been unboxing
he could have been unboxing
we could have been unboxing
you could have been unboxing
they could have been unboxing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't unbox
you couldn't unbox
he couldn't unbox
we couldn't unbox
you couldn't unbox
they couldn't unbox 	I couldn't be unboxing
you couldn't be unboxing
he couldn't be unboxing
we couldn't be unboxing
you couldn't be unboxing
they couldn't be unboxing	I couldn't have unboxed
you couldn't have unboxed
he couldn't have unboxed
we couldn't have unboxed
you couldn't have unboxed
they couldn't have unboxed	I couldn't have been unboxing
you couldn't have been unboxing
he couldn't have been unboxing
we couldn't have been unboxing
you couldn't have been unboxing
they couldn't have been unboxing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I unbox?
could you unbox?
could he unbox?
could we unbox?
could you unbox?
could they unbox? 	could I be unboxing?
could you be unboxing?
could he be unboxing?
could we be unboxing?
could you be unboxing?
could they be unboxing? 	could I have unboxed?
could you have unboxed?
could he have unboxed?
could we have unboxed?
could you have unboxed?
could they have unboxed? 	could I have been unboxing?
could you have been unboxing?
could he have been unboxing?
could we have been unboxing?
could you have been unboxing?
could they have been unboxing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I unbox?
couldn't you unbox?
couldn't he unbox?
couldn't we unbox?
couldn't you unbox?
couldn't they unbox? 	couldn't I be unboxing?
couldn't you be unboxing?
couldn't he be unboxing?
couldn't we be unboxing?
couldn't you be unboxing?
couldn't they be unboxing? 	couldn't I have unboxed?
couldn't you have unboxed?
couldn't he have unboxed?
couldn't we have unboxed?
couldn't you have unboxed?
couldn't they have unboxed? 	couldn't I have been unboxing?
couldn't you have been unboxing?
couldn't he have been unboxing?
couldn't we have been unboxing?
couldn't you have been unboxing?
couldn't they have been unboxing?