could prenegotiate
Regular verb: prenegotiate - prenegotiated- prenegotiated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could prenegotiate
you could prenegotiate
he could prenegotiate
we could prenegotiate
you could prenegotiate
they could prenegotiate 	I could be prenegotiating
you could be prenegotiating
he could be prenegotiating
we could be prenegotiating
you could be prenegotiating
they could be prenegotiating	I could have prenegotiated
you could have prenegotiated
he could have prenegotiated
we could have prenegotiated
you could have prenegotiated
they could have prenegotiated	I could have been prenegotiating
you could have been prenegotiating
he could have been prenegotiating
we could have been prenegotiating
you could have been prenegotiating
they could have been prenegotiating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't prenegotiate
you couldn't prenegotiate
he couldn't prenegotiate
we couldn't prenegotiate
you couldn't prenegotiate
they couldn't prenegotiate 	I couldn't be prenegotiating
you couldn't be prenegotiating
he couldn't be prenegotiating
we couldn't be prenegotiating
you couldn't be prenegotiating
they couldn't be prenegotiating	I couldn't have prenegotiated
you couldn't have prenegotiated
he couldn't have prenegotiated
we couldn't have prenegotiated
you couldn't have prenegotiated
they couldn't have prenegotiated	I couldn't have been prenegotiating
you couldn't have been prenegotiating
he couldn't have been prenegotiating
we couldn't have been prenegotiating
you couldn't have been prenegotiating
they couldn't have been prenegotiating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I prenegotiate?
could you prenegotiate?
could he prenegotiate?
could we prenegotiate?
could you prenegotiate?
could they prenegotiate? 	could I be prenegotiating?
could you be prenegotiating?
could he be prenegotiating?
could we be prenegotiating?
could you be prenegotiating?
could they be prenegotiating? 	could I have prenegotiated?
could you have prenegotiated?
could he have prenegotiated?
could we have prenegotiated?
could you have prenegotiated?
could they have prenegotiated? 	could I have been prenegotiating?
could you have been prenegotiating?
could he have been prenegotiating?
could we have been prenegotiating?
could you have been prenegotiating?
could they have been prenegotiating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I prenegotiate?
couldn't you prenegotiate?
couldn't he prenegotiate?
couldn't we prenegotiate?
couldn't you prenegotiate?
couldn't they prenegotiate? 	couldn't I be prenegotiating?
couldn't you be prenegotiating?
couldn't he be prenegotiating?
couldn't we be prenegotiating?
couldn't you be prenegotiating?
couldn't they be prenegotiating? 	couldn't I have prenegotiated?
couldn't you have prenegotiated?
couldn't he have prenegotiated?
couldn't we have prenegotiated?
couldn't you have prenegotiated?
couldn't they have prenegotiated? 	couldn't I have been prenegotiating?
couldn't you have been prenegotiating?
couldn't he have been prenegotiating?
couldn't we have been prenegotiating?
couldn't you have been prenegotiating?
couldn't they have been prenegotiating?