shall occur
Regular verb: occur - occurred- occurred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll occur
you'll occur
she'll occur
we'll occur
you'll occur
they'll occur 	I'll be occurring
you'll be occurring
she'll be occurring
we'll be occurring
you'll be occurring
they'll be occurring	I'll have occurred
you'll have occurred
she'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
she'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 shan't occur
you shan't occur
she shan't occur
we shan't occur
you shan't occur
they shan't occur 	I shan't be occurring
you shan't be occurring
she shan't be occurring
we shan't be occurring
you shan't be occurring
they shan't be occurring	I shan't have occurred
you shan't have occurred
she shan't have occurred
we shan't have occurred
you shan't have occurred
they shan't have occurred	I shan't have been occurring
you shan't have been occurring
she shan't have been occurring
we shan't have been occurring
you shan't have been occurring
they shan't have been occurring	

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

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