English verb conjugation
COULD NEGOTIATE

Regular verb: negotiate - negotiated - negotiated

Affirmation

Simple form	V-ing form
I could negotiate you could negotiate he could negotiate we could negotiate you could negotiate they could negotiate	I could be negotiating you could be negotiating he 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 he 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 he 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 couldn't negotiate you couldn't negotiate he couldn't negotiate we couldn't negotiate you couldn't negotiate they couldn't negotiate	I couldn't be negotiating you couldn't be negotiating he couldn't be negotiating we couldn't be negotiating you couldn't be negotiating they couldn't be negotiating
Perfect	V-ing perfect
I couldn't have negotiated you couldn't have negotiated he couldn't have negotiated we couldn't have negotiated you couldn't have negotiated they couldn't have negotiated	I couldn't have been negotiating you couldn't have been negotiating he couldn't have been negotiating we couldn't have been negotiating you couldn't have been negotiating they couldn't have been negotiating

Interrogative form

Simple form	V-ing form
could I negotiate? could you negotiate? could he negotiate? could we negotiate? could you negotiate? could they negotiate?	could I be negotiating? could you be negotiating? could he 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 he 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 he 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
couldn't I negotiate? couldn't you negotiate? couldn't he negotiate? couldn't we negotiate? couldn't you negotiate? couldn't they negotiate?	couldn't I be negotiating? couldn't you be negotiating? couldn't he be negotiating? couldn't we be negotiating? couldn't you be negotiating? couldn't they be negotiating?
Perfect	V-ing perfect
couldn't I have negotiated? couldn't you have negotiated? couldn't he have negotiated? couldn't we have negotiated? couldn't you have negotiated? couldn't they have negotiated?	couldn't I have been negotiating? couldn't you have been negotiating? couldn't he have been negotiating? couldn't we have been negotiating? couldn't you have been negotiating? couldn't they have been negotiating?