English verb conjugation
COULD SWARM

Regular verb: swarm - swarmed - swarmed

Affirmation

Simple form	V-ing form
I could swarm you could swarm he could swarm we could swarm you could swarm they could swarm	I could be swarming you could be swarming he could be swarming we could be swarming you could be swarming they could be swarming
Perfect	V-ing perfect
I could have swarmed you could have swarmed he could have swarmed we could have swarmed you could have swarmed they could have swarmed	I could have been swarming you could have been swarming he could have been swarming we could have been swarming you could have been swarming they could have been swarming

Negation

Simple form	V-ing form
I couldn't swarm you couldn't swarm he couldn't swarm we couldn't swarm you couldn't swarm they couldn't swarm	I couldn't be swarming you couldn't be swarming he couldn't be swarming we couldn't be swarming you couldn't be swarming they couldn't be swarming
Perfect	V-ing perfect
I couldn't have swarmed you couldn't have swarmed he couldn't have swarmed we couldn't have swarmed you couldn't have swarmed they couldn't have swarmed	I couldn't have been swarming you couldn't have been swarming he couldn't have been swarming we couldn't have been swarming you couldn't have been swarming they couldn't have been swarming

Interrogative form

Simple form	V-ing form
could I swarm? could you swarm? could he swarm? could we swarm? could you swarm? could they swarm?	could I be swarming? could you be swarming? could he be swarming? could we be swarming? could you be swarming? could they be swarming?
Perfect	V-ing perfect
could I have swarmed? could you have swarmed? could he have swarmed? could we have swarmed? could you have swarmed? could they have swarmed?	could I have been swarming? could you have been swarming? could he have been swarming? could we have been swarming? could you have been swarming? could they have been swarming?

Interro-negative form

Simple form	V-ing form
couldn't I swarm? couldn't you swarm? couldn't he swarm? couldn't we swarm? couldn't you swarm? couldn't they swarm?	couldn't I be swarming? couldn't you be swarming? couldn't he be swarming? couldn't we be swarming? couldn't you be swarming? couldn't they be swarming?
Perfect	V-ing perfect
couldn't I have swarmed? couldn't you have swarmed? couldn't he have swarmed? couldn't we have swarmed? couldn't you have swarmed? couldn't they have swarmed?	couldn't I have been swarming? couldn't you have been swarming? couldn't he have been swarming? couldn't we have been swarming? couldn't you have been swarming? couldn't they have been swarming?