could occur
Verbe régulier : occur - occurred- occurred
Traduction française : arriver - se trouver 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could occur
you could occur
he could occur
we could occur
you could occur
they could occur 	I could be occurring
you could be occurring
he could be occurring
we could be occurring
you could be occurring
they could be occurring	I could have occurred
you could have occurred
he could have occurred
we could have occurred
you could have occurred
they could have occurred	I could have been occurring
you could have been occurring
he could have been occurring
we could have been occurring
you could have been occurring
they could have been occurring	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not occur
you could not occur
he could not occur
we could not occur
you could not occur
they could not occur 	I could not be occurring
you could not be occurring
he could not be occurring
we could not be occurring
you could not be occurring
they could not be occurring	I could not have occurred
you could not have occurred
he could not have occurred
we could not have occurred
you could not have occurred
they could not have occurred	I could not have been occurring
you could not have been occurring
he could not have been occurring
we could not have been occurring
you could not have been occurring
they could not have been occurring	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I occur?
could you occur?
could he occur?
could we occur?
could you occur?
could they occur? 	could I be occurring?
could you be occurring?
could he be occurring?
could we be occurring?
could you be occurring?
could they be occurring? 	could I have occurred?
could you have occurred?
could he have occurred?
could we have occurred?
could you have occurred?
could they have occurred? 	could I have been occurring?
could you have been occurring?
could he have been occurring?
could we have been occurring?
could you have been occurring?
could they have been occurring? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not occur?
could you not occur?
could he not occur?
could we not occur?
could you not occur?
could they not occur? 	could I not be occurring?
could you not be occurring?
could he not be occurring?
could we not be occurring?
could you not be occurring?
could they not be occurring? 	could I not have occurred?
could you not have occurred?
could he not have occurred?
could we not have occurred?
could you not have occurred?
could they not have occurred? 	could I not have been occurring?
could you not have been occurring?
could he not have been occurring?
could we not have been occurring?
could you not have been occurring?
could they not have been occurring?