English verb conjugation
COULD UPRIGHT

Regular verb: upright - uprighted - uprighted

Affirmation

Simple form	V-ing form
I could upright you could upright he could upright we could upright you could upright they could upright	I could be uprighting you could be uprighting he could be uprighting we could be uprighting you could be uprighting they could be uprighting
Perfect	V-ing perfect
I could have uprighted you could have uprighted he could have uprighted we could have uprighted you could have uprighted they could have uprighted	I could have been uprighting you could have been uprighting he could have been uprighting we could have been uprighting you could have been uprighting they could have been uprighting

Negation

Simple form	V-ing form
I could not upright you could not upright he could not upright we could not upright you could not upright they could not upright	I could not be uprighting you could not be uprighting he could not be uprighting we could not be uprighting you could not be uprighting they could not be uprighting
Perfect	V-ing perfect
I could not have uprighted you could not have uprighted he could not have uprighted we could not have uprighted you could not have uprighted they could not have uprighted	I could not have been uprighting you could not have been uprighting he could not have been uprighting we could not have been uprighting you could not have been uprighting they could not have been uprighting

Interrogative form

Simple form	V-ing form
could I upright? could you upright? could he upright? could we upright? could you upright? could they upright?	could I be uprighting? could you be uprighting? could he be uprighting? could we be uprighting? could you be uprighting? could they be uprighting?
Perfect	V-ing perfect
could I have uprighted? could you have uprighted? could he have uprighted? could we have uprighted? could you have uprighted? could they have uprighted?	could I have been uprighting? could you have been uprighting? could he have been uprighting? could we have been uprighting? could you have been uprighting? could they have been uprighting?

Interro-negative form

Simple form	V-ing form
could I not upright? could you not upright? could he not upright? could we not upright? could you not upright? could they not upright?	could I not be uprighting? could you not be uprighting? could he not be uprighting? could we not be uprighting? could you not be uprighting? could they not be uprighting?
Perfect	V-ing perfect
could I not have uprighted? could you not have uprighted? could he not have uprighted? could we not have uprighted? could you not have uprighted? could they not have uprighted?	could I not have been uprighting? could you not have been uprighting? could he not have been uprighting? could we not have been uprighting? could you not have been uprighting? could they not have been uprighting?