English verb conjugation
COULD FILIBUSTER

Regular verb: filibuster - filibustered - filibustered

Affirmation

Simple form	V-ing form
I could filibuster you could filibuster he could filibuster we could filibuster you could filibuster they could filibuster	I could be filibustering you could be filibustering he could be filibustering we could be filibustering you could be filibustering they could be filibustering
Perfect	V-ing perfect
I could have filibustered you could have filibustered he could have filibustered we could have filibustered you could have filibustered they could have filibustered	I could have been filibustering you could have been filibustering he could have been filibustering we could have been filibustering you could have been filibustering they could have been filibustering

Negation

Simple form	V-ing form
I couldn't filibuster you couldn't filibuster he couldn't filibuster we couldn't filibuster you couldn't filibuster they couldn't filibuster	I couldn't be filibustering you couldn't be filibustering he couldn't be filibustering we couldn't be filibustering you couldn't be filibustering they couldn't be filibustering
Perfect	V-ing perfect
I couldn't have filibustered you couldn't have filibustered he couldn't have filibustered we couldn't have filibustered you couldn't have filibustered they couldn't have filibustered	I couldn't have been filibustering you couldn't have been filibustering he couldn't have been filibustering we couldn't have been filibustering you couldn't have been filibustering they couldn't have been filibustering

Interrogative form

Simple form	V-ing form
could I filibuster? could you filibuster? could he filibuster? could we filibuster? could you filibuster? could they filibuster?	could I be filibustering? could you be filibustering? could he be filibustering? could we be filibustering? could you be filibustering? could they be filibustering?
Perfect	V-ing perfect
could I have filibustered? could you have filibustered? could he have filibustered? could we have filibustered? could you have filibustered? could they have filibustered?	could I have been filibustering? could you have been filibustering? could he have been filibustering? could we have been filibustering? could you have been filibustering? could they have been filibustering?

Interro-negative form

Simple form	V-ing form
couldn't I filibuster? couldn't you filibuster? couldn't he filibuster? couldn't we filibuster? couldn't you filibuster? couldn't they filibuster?	couldn't I be filibustering? couldn't you be filibustering? couldn't he be filibustering? couldn't we be filibustering? couldn't you be filibustering? couldn't they be filibustering?
Perfect	V-ing perfect
couldn't I have filibustered? couldn't you have filibustered? couldn't he have filibustered? couldn't we have filibustered? couldn't you have filibustered? couldn't they have filibustered?	couldn't I have been filibustering? couldn't you have been filibustering? couldn't he have been filibustering? couldn't we have been filibustering? couldn't you have been filibustering? couldn't they have been filibustering?