English verb conjugation
COULD NATTER

Regular verb: natter - nattered - nattered

Affirmation

Simple form	V-ing form
I could natter you could natter he could natter we could natter you could natter they could natter	I could be nattering you could be nattering he could be nattering we could be nattering you could be nattering they could be nattering
Perfect	V-ing perfect
I could have nattered you could have nattered he could have nattered we could have nattered you could have nattered they could have nattered	I could have been nattering you could have been nattering he could have been nattering we could have been nattering you could have been nattering they could have been nattering

Negation

Simple form	V-ing form
I could not natter you could not natter he could not natter we could not natter you could not natter they could not natter	I could not be nattering you could not be nattering he could not be nattering we could not be nattering you could not be nattering they could not be nattering
Perfect	V-ing perfect
I could not have nattered you could not have nattered he could not have nattered we could not have nattered you could not have nattered they could not have nattered	I could not have been nattering you could not have been nattering he could not have been nattering we could not have been nattering you could not have been nattering they could not have been nattering

Interrogative form

Simple form	V-ing form
could I natter? could you natter? could he natter? could we natter? could you natter? could they natter?	could I be nattering? could you be nattering? could he be nattering? could we be nattering? could you be nattering? could they be nattering?
Perfect	V-ing perfect
could I have nattered? could you have nattered? could he have nattered? could we have nattered? could you have nattered? could they have nattered?	could I have been nattering? could you have been nattering? could he have been nattering? could we have been nattering? could you have been nattering? could they have been nattering?

Interro-negative form

Simple form	V-ing form
could I not natter? could you not natter? could he not natter? could we not natter? could you not natter? could they not natter?	could I not be nattering? could you not be nattering? could he not be nattering? could we not be nattering? could you not be nattering? could they not be nattering?
Perfect	V-ing perfect
could I not have nattered? could you not have nattered? could he not have nattered? could we not have nattered? could you not have nattered? could they not have nattered?	could I not have been nattering? could you not have been nattering? could he not have been nattering? could we not have been nattering? could you not have been nattering? could they not have been nattering?