I could filibuster you could filibuster she could filibuster we could filibuster you could filibuster they could filibuster
V-ing form
I could be filibustering you could be filibustering she could be filibustering we could be filibustering you could be filibustering they could be filibustering
Perfect
I could have filibustered you could have filibustered she could have filibustered we could have filibustered you could have filibustered they could have filibustered
V-ing perfect
I could have been filibustering you could have been filibustering she could have been filibustering we could have been filibustering you could have been filibustering they could have been filibustering
Negation
Simple form
I could not filibuster you could not filibuster she could not filibuster we could not filibuster you could not filibuster they could not filibuster
V-ing form
I could not be filibustering you could not be filibustering she could not be filibustering we could not be filibustering you could not be filibustering they could not be filibustering
Perfect
I could not have filibustered you could not have filibustered she could not have filibustered we could not have filibustered you could not have filibustered they could not have filibustered
V-ing perfect
I could not have been filibustering you could not have been filibustering she could not have been filibustering we could not have been filibustering you could not have been filibustering they could not have been filibustering
Interrogative form
Simple form
could I filibuster? could you filibuster? could she filibuster? could we filibuster? could you filibuster? could they filibuster?
V-ing form
could I be filibustering? could you be filibustering? could she be filibustering? could we be filibustering? could you be filibustering? could they be filibustering?
Perfect
could I have filibustered? could you have filibustered? could she have filibustered? could we have filibustered? could you have filibustered? could they have filibustered?
V-ing perfect
could I have been filibustering? could you have been filibustering? could she have been filibustering? could we have been filibustering? could you have been filibustering? could they have been filibustering?
Interro-negative form
Simple form
could I not filibuster? could you not filibuster? could she not filibuster? could we not filibuster? could you not filibuster? could they not filibuster?
V-ing form
could I not be filibustering? could you not be filibustering? could she not be filibustering? could we not be filibustering? could you not be filibustering? could they not be filibustering?
Perfect
could I not have filibustered? could you not have filibustered? could she not have filibustered? could we not have filibustered? could you not have filibustered? could they not have filibustered?
V-ing perfect
could I not have been filibustering? could you not have been filibustering? could she not have been filibustering? could we not have been filibustering? could you not have been filibustering? could they not have been filibustering?