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
she could certificate
we could certificate
you could certificate
they could certificate 	I could be certificating
you could be certificating
she could be certificating
we could be certificating
you could be certificating
they could be certificating	I could have certificated
you could have certificated
she 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
she 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 could not certificate
you could not certificate
she could not certificate
we could not certificate
you could not certificate
they could not certificate 	I could not be certificating
you could not be certificating
she could not be certificating
we could not be certificating
you could not be certificating
they could not be certificating	I could not have certificated
you could not have certificated
she could not have certificated
we could not have certificated
you could not have certificated
they could not have certificated	I could not have been certificating
you could not have been certificating
she could not have been certificating
we could not have been certificating
you could not have been certificating
they could not have been certificating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I certificate?
could you certificate?
could she certificate?
could we certificate?
could you certificate?
could they certificate? 	could I be certificating?
could you be certificating?
could she be certificating?
could we be certificating?
could you be certificating?
could they be certificating? 	could I have certificated?
could you have certificated?
could she 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 she 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 	
could I not certificate?
could you not certificate?
could she not certificate?
could we not certificate?
could you not certificate?
could they not certificate? 	could I not be certificating?
could you not be certificating?
could she not be certificating?
could we not be certificating?
could you not be certificating?
could they not be certificating? 	could I not have certificated?
could you not have certificated?
could she not have certificated?
could we not have certificated?
could you not have certificated?
could they not have certificated? 	could I not have been certificating?
could you not have been certificating?
could she not have been certificating?
could we not have been certificating?
could you not have been certificating?
could they not have been certificating?