English verb conjugation
COULD NITRATE

Regular verb: nitrate - nitrated - nitrated

Affirmation

Simple form	V-ing form
I could nitrate you could nitrate he could nitrate we could nitrate you could nitrate they could nitrate	I could be nitrating you could be nitrating he could be nitrating we could be nitrating you could be nitrating they could be nitrating
Perfect	V-ing perfect
I could have nitrated you could have nitrated he could have nitrated we could have nitrated you could have nitrated they could have nitrated	I could have been nitrating you could have been nitrating he could have been nitrating we could have been nitrating you could have been nitrating they could have been nitrating

Negation

Simple form	V-ing form
I could not nitrate you could not nitrate he could not nitrate we could not nitrate you could not nitrate they could not nitrate	I could not be nitrating you could not be nitrating he could not be nitrating we could not be nitrating you could not be nitrating they could not be nitrating
Perfect	V-ing perfect
I could not have nitrated you could not have nitrated he could not have nitrated we could not have nitrated you could not have nitrated they could not have nitrated	I could not have been nitrating you could not have been nitrating he could not have been nitrating we could not have been nitrating you could not have been nitrating they could not have been nitrating

Interrogative form

Simple form	V-ing form
could I nitrate? could you nitrate? could he nitrate? could we nitrate? could you nitrate? could they nitrate?	could I be nitrating? could you be nitrating? could he be nitrating? could we be nitrating? could you be nitrating? could they be nitrating?
Perfect	V-ing perfect
could I have nitrated? could you have nitrated? could he have nitrated? could we have nitrated? could you have nitrated? could they have nitrated?	could I have been nitrating? could you have been nitrating? could he have been nitrating? could we have been nitrating? could you have been nitrating? could they have been nitrating?

Interro-negative form

Simple form	V-ing form
could I not nitrate? could you not nitrate? could he not nitrate? could we not nitrate? could you not nitrate? could they not nitrate?	could I not be nitrating? could you not be nitrating? could he not be nitrating? could we not be nitrating? could you not be nitrating? could they not be nitrating?
Perfect	V-ing perfect
could I not have nitrated? could you not have nitrated? could he not have nitrated? could we not have nitrated? could you not have nitrated? could they not have nitrated?	could I not have been nitrating? could you not have been nitrating? could he not have been nitrating? could we not have been nitrating? could you not have been nitrating? could they not have been nitrating?