English verb conjugation
COULD SULFATE

Regular verb: sulfate - sulfated - sulfated

Affirmation

Simple form	V-ing form
I could sulfate you could sulfate he could sulfate we could sulfate you could sulfate they could sulfate	I could be sulfating you could be sulfating he could be sulfating we could be sulfating you could be sulfating they could be sulfating
Perfect	V-ing perfect
I could have sulfated you could have sulfated he could have sulfated we could have sulfated you could have sulfated they could have sulfated	I could have been sulfating you could have been sulfating he could have been sulfating we could have been sulfating you could have been sulfating they could have been sulfating

Negation

Simple form	V-ing form
I could not sulfate you could not sulfate he could not sulfate we could not sulfate you could not sulfate they could not sulfate	I could not be sulfating you could not be sulfating he could not be sulfating we could not be sulfating you could not be sulfating they could not be sulfating
Perfect	V-ing perfect
I could not have sulfated you could not have sulfated he could not have sulfated we could not have sulfated you could not have sulfated they could not have sulfated	I could not have been sulfating you could not have been sulfating he could not have been sulfating we could not have been sulfating you could not have been sulfating they could not have been sulfating

Interrogative form

Simple form	V-ing form
could I sulfate? could you sulfate? could he sulfate? could we sulfate? could you sulfate? could they sulfate?	could I be sulfating? could you be sulfating? could he be sulfating? could we be sulfating? could you be sulfating? could they be sulfating?
Perfect	V-ing perfect
could I have sulfated? could you have sulfated? could he have sulfated? could we have sulfated? could you have sulfated? could they have sulfated?	could I have been sulfating? could you have been sulfating? could he have been sulfating? could we have been sulfating? could you have been sulfating? could they have been sulfating?

Interro-negative form

Simple form	V-ing form
could I not sulfate? could you not sulfate? could he not sulfate? could we not sulfate? could you not sulfate? could they not sulfate?	could I not be sulfating? could you not be sulfating? could he not be sulfating? could we not be sulfating? could you not be sulfating? could they not be sulfating?
Perfect	V-ing perfect
could I not have sulfated? could you not have sulfated? could he not have sulfated? could we not have sulfated? could you not have sulfated? could they not have sulfated?	could I not have been sulfating? could you not have been sulfating? could he not have been sulfating? could we not have been sulfating? could you not have been sulfating? could they not have been sulfating?