English verb conjugation
COULD PREDATE

Regular verb: predate - predated - predated

Affirmation

Simple form	V-ing form
I could predate you could predate he could predate we could predate you could predate they could predate	I could be predating you could be predating he could be predating we could be predating you could be predating they could be predating
Perfect	V-ing perfect
I could have predated you could have predated he could have predated we could have predated you could have predated they could have predated	I could have been predating you could have been predating he could have been predating we could have been predating you could have been predating they could have been predating

Negation

Simple form	V-ing form
I couldn't predate you couldn't predate he couldn't predate we couldn't predate you couldn't predate they couldn't predate	I couldn't be predating you couldn't be predating he couldn't be predating we couldn't be predating you couldn't be predating they couldn't be predating
Perfect	V-ing perfect
I couldn't have predated you couldn't have predated he couldn't have predated we couldn't have predated you couldn't have predated they couldn't have predated	I couldn't have been predating you couldn't have been predating he couldn't have been predating we couldn't have been predating you couldn't have been predating they couldn't have been predating

Interrogative form

Simple form	V-ing form
could I predate? could you predate? could he predate? could we predate? could you predate? could they predate?	could I be predating? could you be predating? could he be predating? could we be predating? could you be predating? could they be predating?
Perfect	V-ing perfect
could I have predated? could you have predated? could he have predated? could we have predated? could you have predated? could they have predated?	could I have been predating? could you have been predating? could he have been predating? could we have been predating? could you have been predating? could they have been predating?

Interro-negative form

Simple form	V-ing form
couldn't I predate? couldn't you predate? couldn't he predate? couldn't we predate? couldn't you predate? couldn't they predate?	couldn't I be predating? couldn't you be predating? couldn't he be predating? couldn't we be predating? couldn't you be predating? couldn't they be predating?
Perfect	V-ing perfect
couldn't I have predated? couldn't you have predated? couldn't he have predated? couldn't we have predated? couldn't you have predated? couldn't they have predated?	couldn't I have been predating? couldn't you have been predating? couldn't he have been predating? couldn't we have been predating? couldn't you have been predating? couldn't they have been predating?