English verb conjugation
COULD NIELLO

Regular verb: niello - nielloed - nielloed

Affirmation

Simple form	V-ing form
I could niello you could niello he could niello we could niello you could niello they could niello	I could be nielloing you could be nielloing he could be nielloing we could be nielloing you could be nielloing they could be nielloing
Perfect	V-ing perfect
I could have nielloed you could have nielloed he could have nielloed we could have nielloed you could have nielloed they could have nielloed	I could have been nielloing you could have been nielloing he could have been nielloing we could have been nielloing you could have been nielloing they could have been nielloing

Negation

Simple form	V-ing form
I could not niello you could not niello he could not niello we could not niello you could not niello they could not niello	I could not be nielloing you could not be nielloing he could not be nielloing we could not be nielloing you could not be nielloing they could not be nielloing
Perfect	V-ing perfect
I could not have nielloed you could not have nielloed he could not have nielloed we could not have nielloed you could not have nielloed they could not have nielloed	I could not have been nielloing you could not have been nielloing he could not have been nielloing we could not have been nielloing you could not have been nielloing they could not have been nielloing

Interrogative form

Simple form	V-ing form
could I niello? could you niello? could he niello? could we niello? could you niello? could they niello?	could I be nielloing? could you be nielloing? could he be nielloing? could we be nielloing? could you be nielloing? could they be nielloing?
Perfect	V-ing perfect
could I have nielloed? could you have nielloed? could he have nielloed? could we have nielloed? could you have nielloed? could they have nielloed?	could I have been nielloing? could you have been nielloing? could he have been nielloing? could we have been nielloing? could you have been nielloing? could they have been nielloing?

Interro-negative form

Simple form	V-ing form
could I not niello? could you not niello? could he not niello? could we not niello? could you not niello? could they not niello?	could I not be nielloing? could you not be nielloing? could he not be nielloing? could we not be nielloing? could you not be nielloing? could they not be nielloing?
Perfect	V-ing perfect
could I not have nielloed? could you not have nielloed? could he not have nielloed? could we not have nielloed? could you not have nielloed? could they not have nielloed?	could I not have been nielloing? could you not have been nielloing? could he not have been nielloing? could we not have been nielloing? could you not have been nielloing? could they not have been nielloing?