can predecease
Regular verb: predecease - predeceased- predeceased

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

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

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

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