Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could pendulum you could pendulum he could pendulum we could pendulum you could pendulum they could pendulum
V-ing form
I could be penduluming you could be penduluming he could be penduluming we could be penduluming you could be penduluming they could be penduluming
Perfect
I could have pendulumed you could have pendulumed he could have pendulumed we could have pendulumed you could have pendulumed they could have pendulumed
V-ing perfect
I could have been penduluming you could have been penduluming he could have been penduluming we could have been penduluming you could have been penduluming they could have been penduluming
Negation
Simple form
I could not pendulum you could not pendulum he could not pendulum we could not pendulum you could not pendulum they could not pendulum
V-ing form
I could not be penduluming you could not be penduluming he could not be penduluming we could not be penduluming you could not be penduluming they could not be penduluming
Perfect
I could not have pendulumed you could not have pendulumed he could not have pendulumed we could not have pendulumed you could not have pendulumed they could not have pendulumed
V-ing perfect
I could not have been penduluming you could not have been penduluming he could not have been penduluming we could not have been penduluming you could not have been penduluming they could not have been penduluming
Interrogative form
Simple form
could I pendulum? could you pendulum? could he pendulum? could we pendulum? could you pendulum? could they pendulum?
V-ing form
could I be penduluming? could you be penduluming? could he be penduluming? could we be penduluming? could you be penduluming? could they be penduluming?
Perfect
could I have pendulumed? could you have pendulumed? could he have pendulumed? could we have pendulumed? could you have pendulumed? could they have pendulumed?
V-ing perfect
could I have been penduluming? could you have been penduluming? could he have been penduluming? could we have been penduluming? could you have been penduluming? could they have been penduluming?
Interro-negative form
Simple form
could I not pendulum? could you not pendulum? could he not pendulum? could we not pendulum? could you not pendulum? could they not pendulum?
V-ing form
could I not be penduluming? could you not be penduluming? could he not be penduluming? could we not be penduluming? could you not be penduluming? could they not be penduluming?
Perfect
could I not have pendulumed? could you not have pendulumed? could he not have pendulumed? could we not have pendulumed? could you not have pendulumed? could they not have pendulumed?
V-ing perfect
could I not have been penduluming? could you not have been penduluming? could he not have been penduluming? could we not have been penduluming? could you not have been penduluming? could they not have been penduluming?