English verb conjugation
COULD AMELIORATE

Regular verb: ameliorate - ameliorated - ameliorated

Affirmation

Simple form	V-ing form
I could ameliorate you could ameliorate he could ameliorate we could ameliorate you could ameliorate they could ameliorate	I could be ameliorating you could be ameliorating he could be ameliorating we could be ameliorating you could be ameliorating they could be ameliorating
Perfect	V-ing perfect
I could have ameliorated you could have ameliorated he could have ameliorated we could have ameliorated you could have ameliorated they could have ameliorated	I could have been ameliorating you could have been ameliorating he could have been ameliorating we could have been ameliorating you could have been ameliorating they could have been ameliorating

Negation

Simple form	V-ing form
I could not ameliorate you could not ameliorate he could not ameliorate we could not ameliorate you could not ameliorate they could not ameliorate	I could not be ameliorating you could not be ameliorating he could not be ameliorating we could not be ameliorating you could not be ameliorating they could not be ameliorating
Perfect	V-ing perfect
I could not have ameliorated you could not have ameliorated he could not have ameliorated we could not have ameliorated you could not have ameliorated they could not have ameliorated	I could not have been ameliorating you could not have been ameliorating he could not have been ameliorating we could not have been ameliorating you could not have been ameliorating they could not have been ameliorating

Interrogative form

Simple form	V-ing form
could I ameliorate? could you ameliorate? could he ameliorate? could we ameliorate? could you ameliorate? could they ameliorate?	could I be ameliorating? could you be ameliorating? could he be ameliorating? could we be ameliorating? could you be ameliorating? could they be ameliorating?
Perfect	V-ing perfect
could I have ameliorated? could you have ameliorated? could he have ameliorated? could we have ameliorated? could you have ameliorated? could they have ameliorated?	could I have been ameliorating? could you have been ameliorating? could he have been ameliorating? could we have been ameliorating? could you have been ameliorating? could they have been ameliorating?

Interro-negative form

Simple form	V-ing form
could I not ameliorate? could you not ameliorate? could he not ameliorate? could we not ameliorate? could you not ameliorate? could they not ameliorate?	could I not be ameliorating? could you not be ameliorating? could he not be ameliorating? could we not be ameliorating? could you not be ameliorating? could they not be ameliorating?
Perfect	V-ing perfect
could I not have ameliorated? could you not have ameliorated? could he not have ameliorated? could we not have ameliorated? could you not have ameliorated? could they not have ameliorated?	could I not have been ameliorating? could you not have been ameliorating? could he not have been ameliorating? could we not have been ameliorating? could you not have been ameliorating? could they not have been ameliorating?