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

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

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

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

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