English verb conjugation
COULD FLOCK

Regular verb: flock - flocked - flocked

Affirmation

Simple form	V-ing form
I could flock you could flock he could flock we could flock you could flock they could flock	I could be flocking you could be flocking he could be flocking we could be flocking you could be flocking they could be flocking
Perfect	V-ing perfect
I could have flocked you could have flocked he could have flocked we could have flocked you could have flocked they could have flocked	I could have been flocking you could have been flocking he could have been flocking we could have been flocking you could have been flocking they could have been flocking

Negation

Simple form	V-ing form
I couldn't flock you couldn't flock he couldn't flock we couldn't flock you couldn't flock they couldn't flock	I couldn't be flocking you couldn't be flocking he couldn't be flocking we couldn't be flocking you couldn't be flocking they couldn't be flocking
Perfect	V-ing perfect
I couldn't have flocked you couldn't have flocked he couldn't have flocked we couldn't have flocked you couldn't have flocked they couldn't have flocked	I couldn't have been flocking you couldn't have been flocking he couldn't have been flocking we couldn't have been flocking you couldn't have been flocking they couldn't have been flocking

Interrogative form

Simple form	V-ing form
could I flock? could you flock? could he flock? could we flock? could you flock? could they flock?	could I be flocking? could you be flocking? could he be flocking? could we be flocking? could you be flocking? could they be flocking?
Perfect	V-ing perfect
could I have flocked? could you have flocked? could he have flocked? could we have flocked? could you have flocked? could they have flocked?	could I have been flocking? could you have been flocking? could he have been flocking? could we have been flocking? could you have been flocking? could they have been flocking?

Interro-negative form

Simple form	V-ing form
couldn't I flock? couldn't you flock? couldn't he flock? couldn't we flock? couldn't you flock? couldn't they flock?	couldn't I be flocking? couldn't you be flocking? couldn't he be flocking? couldn't we be flocking? couldn't you be flocking? couldn't they be flocking?
Perfect	V-ing perfect
couldn't I have flocked? couldn't you have flocked? couldn't he have flocked? couldn't we have flocked? couldn't you have flocked? couldn't they have flocked?	couldn't I have been flocking? couldn't you have been flocking? couldn't he have been flocking? couldn't we have been flocking? couldn't you have been flocking? couldn't they have been flocking?