can negotiate
Regular verb: negotiate - negotiated- negotiated

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

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

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

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