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 couldn't upright you couldn't upright he couldn't upright we couldn't upright you couldn't upright they couldn't upright	I couldn't be uprighting you couldn't be uprighting he couldn't be uprighting we couldn't be uprighting you couldn't be uprighting they couldn't be uprighting
Perfect	V-ing perfect
I couldn't have uprighted you couldn't have uprighted he couldn't have uprighted we couldn't have uprighted you couldn't have uprighted they couldn't have uprighted	I couldn't have been uprighting you couldn't have been uprighting he couldn't have been uprighting we couldn't have been uprighting you couldn't have been uprighting they couldn't 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
couldn't I upright? couldn't you upright? couldn't he upright? couldn't we upright? couldn't you upright? couldn't they upright?	couldn't I be uprighting? couldn't you be uprighting? couldn't he be uprighting? couldn't we be uprighting? couldn't you be uprighting? couldn't they be uprighting?
Perfect	V-ing perfect
couldn't I have uprighted? couldn't you have uprighted? couldn't he have uprighted? couldn't we have uprighted? couldn't you have uprighted? couldn't they have uprighted?	couldn't I have been uprighting? couldn't you have been uprighting? couldn't he have been uprighting? couldn't we have been uprighting? couldn't you have been uprighting? couldn't they have been uprighting?