English verb conjugation
COULD PREDECEASE

Regular verb: predecease - predeceased - predeceased

Affirmation

Simple form	V-ing form
I could predecease you could predecease she could predecease we could predecease you could predecease they could predecease	I could be predeceasing you could be predeceasing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she predecease? could we predecease? could you predecease? could they predecease?	could I be predeceasing? could you be predeceasing? could she 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 she 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 she 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 she 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 she 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 she 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 she not have been predeceasing? could we not have been predeceasing? could you not have been predeceasing? could they not have been predeceasing?