could certificate
Verbe régulier : certificate - certificated- certificated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could certificate
you could certificate
he could certificate
we could certificate
you could certificate
they could certificate 	I could be certificating
you could be certificating
he could be certificating
we could be certificating
you could be certificating
they could be certificating	I could have certificated
you could have certificated
he could have certificated
we could have certificated
you could have certificated
they could have certificated	I could have been certificating
you could have been certificating
he could have been certificating
we could have been certificating
you could have been certificating
they could have been certificating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't certificate
you couldn't certificate
he couldn't certificate
we couldn't certificate
you couldn't certificate
they couldn't certificate 	I couldn't be certificating
you couldn't be certificating
he couldn't be certificating
we couldn't be certificating
you couldn't be certificating
they couldn't be certificating	I couldn't have certificated
you couldn't have certificated
he couldn't have certificated
we couldn't have certificated
you couldn't have certificated
they couldn't have certificated	I couldn't have been certificating
you couldn't have been certificating
he couldn't have been certificating
we couldn't have been certificating
you couldn't have been certificating
they couldn't have been certificating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I certificate?
could you certificate?
could he certificate?
could we certificate?
could you certificate?
could they certificate? 	could I be certificating?
could you be certificating?
could he be certificating?
could we be certificating?
could you be certificating?
could they be certificating? 	could I have certificated?
could you have certificated?
could he have certificated?
could we have certificated?
could you have certificated?
could they have certificated? 	could I have been certificating?
could you have been certificating?
could he have been certificating?
could we have been certificating?
could you have been certificating?
could they have been certificating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I certificate?
couldn't you certificate?
couldn't he certificate?
couldn't we certificate?
couldn't you certificate?
couldn't they certificate? 	couldn't I be certificating?
couldn't you be certificating?
couldn't he be certificating?
couldn't we be certificating?
couldn't you be certificating?
couldn't they be certificating? 	couldn't I have certificated?
couldn't you have certificated?
couldn't he have certificated?
couldn't we have certificated?
couldn't you have certificated?
couldn't they have certificated? 	couldn't I have been certificating?
couldn't you have been certificating?
couldn't he have been certificating?
couldn't we have been certificating?
couldn't you have been certificating?
couldn't they have been certificating?