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