could witness
Verbe régulier : witness - witnessed- witnessed
Traduction française : être témoin de - témoigner 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could witness
you could witness
she could witness
we could witness
you could witness
they could witness 	I could be witnessing
you could be witnessing
she could be witnessing
we could be witnessing
you could be witnessing
they could be witnessing	I could have witnessed
you could have witnessed
she could have witnessed
we could have witnessed
you could have witnessed
they could have witnessed	I could have been witnessing
you could have been witnessing
she could have been witnessing
we could have been witnessing
you could have been witnessing
they could have been witnessing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't witness
you couldn't witness
she couldn't witness
we couldn't witness
you couldn't witness
they couldn't witness 	I couldn't be witnessing
you couldn't be witnessing
she couldn't be witnessing
we couldn't be witnessing
you couldn't be witnessing
they couldn't be witnessing	I couldn't have witnessed
you couldn't have witnessed
she couldn't have witnessed
we couldn't have witnessed
you couldn't have witnessed
they couldn't have witnessed	I couldn't have been witnessing
you couldn't have been witnessing
she couldn't have been witnessing
we couldn't have been witnessing
you couldn't have been witnessing
they couldn't have been witnessing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I witness?
could you witness?
could she witness?
could we witness?
could you witness?
could they witness? 	could I be witnessing?
could you be witnessing?
could she be witnessing?
could we be witnessing?
could you be witnessing?
could they be witnessing? 	could I have witnessed?
could you have witnessed?
could she have witnessed?
could we have witnessed?
could you have witnessed?
could they have witnessed? 	could I have been witnessing?
could you have been witnessing?
could she have been witnessing?
could we have been witnessing?
could you have been witnessing?
could they have been witnessing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I witness?
couldn't you witness?
couldn't she witness?
couldn't we witness?
couldn't you witness?
couldn't they witness? 	couldn't I be witnessing?
couldn't you be witnessing?
couldn't she be witnessing?
couldn't we be witnessing?
couldn't you be witnessing?
couldn't they be witnessing? 	couldn't I have witnessed?
couldn't you have witnessed?
couldn't she have witnessed?
couldn't we have witnessed?
couldn't you have witnessed?
couldn't they have witnessed? 	couldn't I have been witnessing?
couldn't you have been witnessing?
couldn't she have been witnessing?
couldn't we have been witnessing?
couldn't you have been witnessing?
couldn't they have been witnessing?