English verb conjugation
COULD PREDECEASE

Regular verb: predecease - predeceased - predeceased

Affirmation

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

Negation

Simple form	V-ing form
I could not predecease you could not predecease he could not predecease we could not predecease you could not predecease they could not predecease	I could not be predeceasing you could not be predeceasing he could not be predeceasing we could not be predeceasing you could not be predeceasing they could not be predeceasing
Perfect	V-ing perfect
I could not have predeceased you could not have predeceased he could not have predeceased we could not have predeceased you could not have predeceased they could not have predeceased	I could not have been predeceasing you could not have been predeceasing he could not have been predeceasing we could not have been predeceasing you could not have been predeceasing they could not have been predeceasing

Interrogative form

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

Interro-negative form

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