shall predecease
Regular verb: predecease - predeceased- predeceased

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll predecease
you'll predecease
he'll predecease
we'll predecease
you'll predecease
they'll predecease 	I'll be predeceasing
you'll be predeceasing
he'll be predeceasing
we'll be predeceasing
you'll be predeceasing
they'll be predeceasing	I'll have predeceased
you'll have predeceased
he'll have predeceased
we'll have predeceased
you'll have predeceased
they'll have predeceased	I'll have been predeceasing
you'll have been predeceasing
he'll have been predeceasing
we'll have been predeceasing
you'll have been predeceasing
they'll have been predeceasing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't predecease
you shan't predecease
he shan't predecease
we shan't predecease
you shan't predecease
they shan't predecease 	I shan't be predeceasing
you shan't be predeceasing
he shan't be predeceasing
we shan't be predeceasing
you shan't be predeceasing
they shan't be predeceasing	I shan't have predeceased
you shan't have predeceased
he shan't have predeceased
we shan't have predeceased
you shan't have predeceased
they shan't have predeceased	I shan't have been predeceasing
you shan't have been predeceasing
he shan't have been predeceasing
we shan't have been predeceasing
you shan't have been predeceasing
they shan't have been predeceasing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I predecease?
shall you predecease?
shall he predecease?
shall we predecease?
shall you predecease?
shall they predecease? 	shall I be predeceasing?
shall you be predeceasing?
shall he be predeceasing?
shall we be predeceasing?
shall you be predeceasing?
shall they be predeceasing? 	shall I have predeceased?
shall you have predeceased?
shall he have predeceased?
shall we have predeceased?
shall you have predeceased?
shall they have predeceased? 	shall I have been predeceasing?
shall you have been predeceasing?
shall he have been predeceasing?
shall we have been predeceasing?
shall you have been predeceasing?
shall they have been predeceasing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I predecease?
shan't you predecease?
shan't he predecease?
shan't we predecease?
shan't you predecease?
shan't they predecease? 	shan't I be predeceasing?
shan't you be predeceasing?
shan't he be predeceasing?
shan't we be predeceasing?
shan't you be predeceasing?
shan't they be predeceasing? 	shan't I have predeceased?
shan't you have predeceased?
shan't he have predeceased?
shan't we have predeceased?
shan't you have predeceased?
shan't they have predeceased? 	shan't I have been predeceasing?
shan't you have been predeceasing?
shan't he have been predeceasing?
shan't we have been predeceasing?
shan't you have been predeceasing?
shan't they have been predeceasing?