English verb conjugation
COULD ZIG

Regular verb: zig - ziged - ziged

Affirmation

Simple form	V-ing form
I could zig you could zig she could zig we could zig you could zig they could zig	I could be ziging you could be ziging she 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 she 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 she 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 couldn't zig you couldn't zig she couldn't zig we couldn't zig you couldn't zig they couldn't zig	I couldn't be ziging you couldn't be ziging she couldn't be ziging we couldn't be ziging you couldn't be ziging they couldn't be ziging
Perfect	V-ing perfect
I couldn't have ziged you couldn't have ziged she couldn't have ziged we couldn't have ziged you couldn't have ziged they couldn't have ziged	I couldn't have been ziging you couldn't have been ziging she couldn't have been ziging we couldn't have been ziging you couldn't have been ziging they couldn't have been ziging

Interrogative form

Simple form	V-ing form
could I zig? could you zig? could she zig? could we zig? could you zig? could they zig?	could I be ziging? could you be ziging? could she 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 she 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 she 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
couldn't I zig? couldn't you zig? couldn't she zig? couldn't we zig? couldn't you zig? couldn't they zig?	couldn't I be ziging? couldn't you be ziging? couldn't she be ziging? couldn't we be ziging? couldn't you be ziging? couldn't they be ziging?
Perfect	V-ing perfect
couldn't I have ziged? couldn't you have ziged? couldn't she have ziged? couldn't we have ziged? couldn't you have ziged? couldn't they have ziged?	couldn't I have been ziging? couldn't you have been ziging? couldn't she have been ziging? couldn't we have been ziging? couldn't you have been ziging? couldn't they have been ziging?