English verb conjugation
COULD ZIG

Regular verb: zig - ziged - ziged

Affirmation

Simple form	V-ing form
I could zig you could zig he could zig we could zig you could zig they could zig	I could be ziging you could be ziging he could be ziging we could be ziging you could be ziging they could be ziging
Perfect	V-ing perfect
I could have ziged you could have ziged he could have ziged we could have ziged you could have ziged they could have ziged	I could have been ziging you could have been ziging he could have been ziging we could have been ziging you could have been ziging they could have been ziging

Negation

Simple form	V-ing form
I could not zig you could not zig he could not zig we could not zig you could not zig they could not zig	I could not be ziging you could not be ziging he could not be ziging we could not be ziging you could not be ziging they could not be ziging
Perfect	V-ing perfect
I could not have ziged you could not have ziged he could not have ziged we could not have ziged you could not have ziged they could not have ziged	I could not have been ziging you could not have been ziging he could not have been ziging we could not have been ziging you could not have been ziging they could not have been ziging

Interrogative form

Simple form	V-ing form
could I zig? could you zig? could he zig? could we zig? could you zig? could they zig?	could I be ziging? could you be ziging? could he be ziging? could we be ziging? could you be ziging? could they be ziging?
Perfect	V-ing perfect
could I have ziged? could you have ziged? could he have ziged? could we have ziged? could you have ziged? could they have ziged?	could I have been ziging? could you have been ziging? could he have been ziging? could we have been ziging? could you have been ziging? could they have been ziging?

Interro-negative form

Simple form	V-ing form
could I not zig? could you not zig? could he not zig? could we not zig? could you not zig? could they not zig?	could I not be ziging? could you not be ziging? could he not be ziging? could we not be ziging? could you not be ziging? could they not be ziging?
Perfect	V-ing perfect
could I not have ziged? could you not have ziged? could he not have ziged? could we not have ziged? could you not have ziged? could they not have ziged?	could I not have been ziging? could you not have been ziging? could he not have been ziging? could we not have been ziging? could you not have been ziging? could they not have been ziging?