can negotiate
Regular verb: negotiate - negotiated- negotiated

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

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