could zipper
Verbe régulier : zipper - zippered- zippered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could zipper
you could zipper
she could zipper
we could zipper
you could zipper
they could zipper 	I could be zippering
you could be zippering
she could be zippering
we could be zippering
you could be zippering
they could be zippering	I could have zippered
you could have zippered
she could have zippered
we could have zippered
you could have zippered
they could have zippered	I could have been zippering
you could have been zippering
she could have been zippering
we could have been zippering
you could have been zippering
they could have been zippering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't zipper
you couldn't zipper
she couldn't zipper
we couldn't zipper
you couldn't zipper
they couldn't zipper 	I couldn't be zippering
you couldn't be zippering
she couldn't be zippering
we couldn't be zippering
you couldn't be zippering
they couldn't be zippering	I couldn't have zippered
you couldn't have zippered
she couldn't have zippered
we couldn't have zippered
you couldn't have zippered
they couldn't have zippered	I couldn't have been zippering
you couldn't have been zippering
she couldn't have been zippering
we couldn't have been zippering
you couldn't have been zippering
they couldn't have been zippering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I zipper?
could you zipper?
could she zipper?
could we zipper?
could you zipper?
could they zipper? 	could I be zippering?
could you be zippering?
could she be zippering?
could we be zippering?
could you be zippering?
could they be zippering? 	could I have zippered?
could you have zippered?
could she have zippered?
could we have zippered?
could you have zippered?
could they have zippered? 	could I have been zippering?
could you have been zippering?
could she have been zippering?
could we have been zippering?
could you have been zippering?
could they have been zippering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I zipper?
couldn't you zipper?
couldn't she zipper?
couldn't we zipper?
couldn't you zipper?
couldn't they zipper? 	couldn't I be zippering?
couldn't you be zippering?
couldn't she be zippering?
couldn't we be zippering?
couldn't you be zippering?
couldn't they be zippering? 	couldn't I have zippered?
couldn't you have zippered?
couldn't she have zippered?
couldn't we have zippered?
couldn't you have zippered?
couldn't they have zippered? 	couldn't I have been zippering?
couldn't you have been zippering?
couldn't she have been zippering?
couldn't we have been zippering?
couldn't you have been zippering?
couldn't they have been zippering?