may predecease
Regular verb: predecease - predeceased- predeceased

Affirmation 	
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I may predecease
you may predecease
he may predecease
we may predecease
you may predecease
they may predecease 	I may be predeceasing
you may be predeceasing
he may be predeceasing
we may be predeceasing
you may be predeceasing
they may be predeceasing	I may have predeceased
you may have predeceased
he may have predeceased
we may have predeceased
you may have predeceased
they may have predeceased	I may have been predeceasing
you may have been predeceasing
he may have been predeceasing
we may have been predeceasing
you may have been predeceasing
they may have been predeceasing	

Negation 	
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I may not predecease
you may not predecease
he may not predecease
we may not predecease
you may not predecease
they may not predecease 	I may not be predeceasing
you may not be predeceasing
he may not be predeceasing
we may not be predeceasing
you may not be predeceasing
they may not be predeceasing	I may not have predeceased
you may not have predeceased
he may not have predeceased
we may not have predeceased
you may not have predeceased
they may not have predeceased	I may not have been predeceasing
you may not have been predeceasing
he may not have been predeceasing
we may not have been predeceasing
you may not have been predeceasing
they may not have been predeceasing	

Interrogative form 	
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may I predecease?
may you predecease?
may he predecease?
may we predecease?
may you predecease?
may they predecease? 	may I be predeceasing?
may you be predeceasing?
may he be predeceasing?
may we be predeceasing?
may you be predeceasing?
may they be predeceasing? 	may I have predeceased?
may you have predeceased?
may he have predeceased?
may we have predeceased?
may you have predeceased?
may they have predeceased? 	may I have been predeceasing?
may you have been predeceasing?
may he have been predeceasing?
may we have been predeceasing?
may you have been predeceasing?
may they have been predeceasing? 	

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