English verb conjugation
COULD DEUTERATE

Regular verb: deuterate - deuterated - deuterated

Affirmation

Simple form	V-ing form
I could deuterate you could deuterate he could deuterate we could deuterate you could deuterate they could deuterate	I could be deuterating you could be deuterating he could be deuterating we could be deuterating you could be deuterating they could be deuterating
Perfect	V-ing perfect
I could have deuterated you could have deuterated he could have deuterated we could have deuterated you could have deuterated they could have deuterated	I could have been deuterating you could have been deuterating he could have been deuterating we could have been deuterating you could have been deuterating they could have been deuterating

Negation

Simple form	V-ing form
I could not deuterate you could not deuterate he could not deuterate we could not deuterate you could not deuterate they could not deuterate	I could not be deuterating you could not be deuterating he could not be deuterating we could not be deuterating you could not be deuterating they could not be deuterating
Perfect	V-ing perfect
I could not have deuterated you could not have deuterated he could not have deuterated we could not have deuterated you could not have deuterated they could not have deuterated	I could not have been deuterating you could not have been deuterating he could not have been deuterating we could not have been deuterating you could not have been deuterating they could not have been deuterating

Interrogative form

Simple form	V-ing form
could I deuterate? could you deuterate? could he deuterate? could we deuterate? could you deuterate? could they deuterate?	could I be deuterating? could you be deuterating? could he be deuterating? could we be deuterating? could you be deuterating? could they be deuterating?
Perfect	V-ing perfect
could I have deuterated? could you have deuterated? could he have deuterated? could we have deuterated? could you have deuterated? could they have deuterated?	could I have been deuterating? could you have been deuterating? could he have been deuterating? could we have been deuterating? could you have been deuterating? could they have been deuterating?

Interro-negative form

Simple form	V-ing form
could I not deuterate? could you not deuterate? could he not deuterate? could we not deuterate? could you not deuterate? could they not deuterate?	could I not be deuterating? could you not be deuterating? could he not be deuterating? could we not be deuterating? could you not be deuterating? could they not be deuterating?
Perfect	V-ing perfect
could I not have deuterated? could you not have deuterated? could he not have deuterated? could we not have deuterated? could you not have deuterated? could they not have deuterated?	could I not have been deuterating? could you not have been deuterating? could he not have been deuterating? could we not have been deuterating? could you not have been deuterating? could they not have been deuterating?