will occur
Regular verb: occur - occurred- occurred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll occur
you'll occur
he'll occur
we'll occur
you'll occur
they'll occur 	I'll be occurring
you'll be occurring
he'll be occurring
we'll be occurring
you'll be occurring
they'll be occurring	I'll have occurred
you'll have occurred
he'll have occurred
we'll have occurred
you'll have occurred
they'll have occurred	I'll have been occurring
you'll have been occurring
he'll have been occurring
we'll have been occurring
you'll have been occurring
they'll have been occurring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I won't occur
you won't occur
he won't occur
we won't occur
you won't occur
they won't occur 	I won't be occurring
you won't be occurring
he won't be occurring
we won't be occurring
you won't be occurring
they won't be occurring	I won't have occurred
you won't have occurred
he won't have occurred
we won't have occurred
you won't have occurred
they won't have occurred	I won't have been occurring
you won't have been occurring
he won't have been occurring
we won't have been occurring
you won't have been occurring
they won't have been occurring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
will I occur?
will you occur?
will he occur?
will we occur?
will you occur?
will they occur? 	will I be occurring?
will you be occurring?
will he be occurring?
will we be occurring?
will you be occurring?
will they be occurring? 	will I have occurred?
will you have occurred?
will he have occurred?
will we have occurred?
will you have occurred?
will they have occurred? 	will I have been occurring?
will you have been occurring?
will he have been occurring?
will we have been occurring?
will you have been occurring?
will they have been occurring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
won't I occur?
won't you occur?
won't he occur?
won't we occur?
won't you occur?
won't they occur? 	won't I be occurring?
won't you be occurring?
won't he be occurring?
won't we be occurring?
won't you be occurring?
won't they be occurring? 	won't I have occurred?
won't you have occurred?
won't he have occurred?
won't we have occurred?
won't you have occurred?
won't they have occurred? 	won't I have been occurring?
won't you have been occurring?
won't he have been occurring?
won't we have been occurring?
won't you have been occurring?
won't they have been occurring?