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 couldn't predecease you couldn't predecease he couldn't predecease we couldn't predecease you couldn't predecease they couldn't predecease	I couldn't be predeceasing you couldn't be predeceasing he couldn't be predeceasing we couldn't be predeceasing you couldn't be predeceasing they couldn't be predeceasing
Perfect	V-ing perfect
I couldn't have predeceased you couldn't have predeceased he couldn't have predeceased we couldn't have predeceased you couldn't have predeceased they couldn't have predeceased	I couldn't have been predeceasing you couldn't have been predeceasing he couldn't have been predeceasing we couldn't have been predeceasing you couldn't have been predeceasing they couldn't 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
couldn't I predecease? couldn't you predecease? couldn't he predecease? couldn't we predecease? couldn't you predecease? couldn't they predecease?	couldn't I be predeceasing? couldn't you be predeceasing? couldn't he be predeceasing? couldn't we be predeceasing? couldn't you be predeceasing? couldn't they be predeceasing?
Perfect	V-ing perfect
couldn't I have predeceased? couldn't you have predeceased? couldn't he have predeceased? couldn't we have predeceased? couldn't you have predeceased? couldn't they have predeceased?	couldn't I have been predeceasing? couldn't you have been predeceasing? couldn't he have been predeceasing? couldn't we have been predeceasing? couldn't you have been predeceasing? couldn't they have been predeceasing?