English verb conjugation
COULD TREAT

Regular verb: treat - treated - treated

Affirmation

Simple form	V-ing form
I could treat you could treat she could treat we could treat you could treat they could treat	I could be treating you could be treating she could be treating we could be treating you could be treating they could be treating
Perfect	V-ing perfect
I could have treated you could have treated she could have treated we could have treated you could have treated they could have treated	I could have been treating you could have been treating she could have been treating we could have been treating you could have been treating they could have been treating

Negation

Simple form	V-ing form
I could not treat you could not treat she could not treat we could not treat you could not treat they could not treat	I could not be treating you could not be treating she could not be treating we could not be treating you could not be treating they could not be treating
Perfect	V-ing perfect
I could not have treated you could not have treated she could not have treated we could not have treated you could not have treated they could not have treated	I could not have been treating you could not have been treating she could not have been treating we could not have been treating you could not have been treating they could not have been treating

Interrogative form

Simple form	V-ing form
could I treat? could you treat? could she treat? could we treat? could you treat? could they treat?	could I be treating? could you be treating? could she be treating? could we be treating? could you be treating? could they be treating?
Perfect	V-ing perfect
could I have treated? could you have treated? could she have treated? could we have treated? could you have treated? could they have treated?	could I have been treating? could you have been treating? could she have been treating? could we have been treating? could you have been treating? could they have been treating?

Interro-negative form

Simple form	V-ing form
could I not treat? could you not treat? could she not treat? could we not treat? could you not treat? could they not treat?	could I not be treating? could you not be treating? could she not be treating? could we not be treating? could you not be treating? could they not be treating?
Perfect	V-ing perfect
could I not have treated? could you not have treated? could she not have treated? could we not have treated? could you not have treated? could they not have treated?	could I not have been treating? could you not have been treating? could she not have been treating? could we not have been treating? could you not have been treating? could they not have been treating?