English verb conjugation
COULD NEGOTIATE

Regular verb: negotiate - negotiated - negotiated

Affirmation

Simple form	V-ing form
I could negotiate you could negotiate she could negotiate we could negotiate you could negotiate they could negotiate	I could be negotiating you could be negotiating she could be negotiating we could be negotiating you could be negotiating they could be negotiating
Perfect	V-ing perfect
I could have negotiated you could have negotiated she could have negotiated we could have negotiated you could have negotiated they could have negotiated	I could have been negotiating you could have been negotiating she could have been negotiating we could have been negotiating you could have been negotiating they could have been negotiating

Negation

Simple form	V-ing form
I could not negotiate you could not negotiate she could not negotiate we could not negotiate you could not negotiate they could not negotiate	I could not be negotiating you could not be negotiating she could not be negotiating we could not be negotiating you could not be negotiating they could not be negotiating
Perfect	V-ing perfect
I could not have negotiated you could not have negotiated she could not have negotiated we could not have negotiated you could not have negotiated they could not have negotiated	I could not have been negotiating you could not have been negotiating she could not have been negotiating we could not have been negotiating you could not have been negotiating they could not have been negotiating

Interrogative form

Simple form	V-ing form
could I negotiate? could you negotiate? could she negotiate? could we negotiate? could you negotiate? could they negotiate?	could I be negotiating? could you be negotiating? could she be negotiating? could we be negotiating? could you be negotiating? could they be negotiating?
Perfect	V-ing perfect
could I have negotiated? could you have negotiated? could she have negotiated? could we have negotiated? could you have negotiated? could they have negotiated?	could I have been negotiating? could you have been negotiating? could she have been negotiating? could we have been negotiating? could you have been negotiating? could they have been negotiating?

Interro-negative form

Simple form	V-ing form
could I not negotiate? could you not negotiate? could she not negotiate? could we not negotiate? could you not negotiate? could they not negotiate?	could I not be negotiating? could you not be negotiating? could she not be negotiating? could we not be negotiating? could you not be negotiating? could they not be negotiating?
Perfect	V-ing perfect
could I not have negotiated? could you not have negotiated? could she not have negotiated? could we not have negotiated? could you not have negotiated? could they not have negotiated?	could I not have been negotiating? could you not have been negotiating? could she not have been negotiating? could we not have been negotiating? could you not have been negotiating? could they not have been negotiating?