English verb conjugation
COULD FLACK

Regular verb: flack - flacked - flacked

Affirmation

Simple form	V-ing form
I could flack you could flack he could flack we could flack you could flack they could flack	I could be flacking you could be flacking he could be flacking we could be flacking you could be flacking they could be flacking
Perfect	V-ing perfect
I could have flacked you could have flacked he could have flacked we could have flacked you could have flacked they could have flacked	I could have been flacking you could have been flacking he could have been flacking we could have been flacking you could have been flacking they could have been flacking

Negation

Simple form	V-ing form
I couldn't flack you couldn't flack he couldn't flack we couldn't flack you couldn't flack they couldn't flack	I couldn't be flacking you couldn't be flacking he couldn't be flacking we couldn't be flacking you couldn't be flacking they couldn't be flacking
Perfect	V-ing perfect
I couldn't have flacked you couldn't have flacked he couldn't have flacked we couldn't have flacked you couldn't have flacked they couldn't have flacked	I couldn't have been flacking you couldn't have been flacking he couldn't have been flacking we couldn't have been flacking you couldn't have been flacking they couldn't have been flacking

Interrogative form

Simple form	V-ing form
could I flack? could you flack? could he flack? could we flack? could you flack? could they flack?	could I be flacking? could you be flacking? could he be flacking? could we be flacking? could you be flacking? could they be flacking?
Perfect	V-ing perfect
could I have flacked? could you have flacked? could he have flacked? could we have flacked? could you have flacked? could they have flacked?	could I have been flacking? could you have been flacking? could he have been flacking? could we have been flacking? could you have been flacking? could they have been flacking?

Interro-negative form

Simple form	V-ing form
couldn't I flack? couldn't you flack? couldn't he flack? couldn't we flack? couldn't you flack? couldn't they flack?	couldn't I be flacking? couldn't you be flacking? couldn't he be flacking? couldn't we be flacking? couldn't you be flacking? couldn't they be flacking?
Perfect	V-ing perfect
couldn't I have flacked? couldn't you have flacked? couldn't he have flacked? couldn't we have flacked? couldn't you have flacked? couldn't they have flacked?	couldn't I have been flacking? couldn't you have been flacking? couldn't he have been flacking? couldn't we have been flacking? couldn't you have been flacking? couldn't they have been flacking?