could cooperate
Regular verb: cooperate - cooperated- cooperated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cooperate
you could cooperate
she could cooperate
we could cooperate
you could cooperate
they could cooperate 	I could be cooperating
you could be cooperating
she could be cooperating
we could be cooperating
you could be cooperating
they could be cooperating	I could have cooperated
you could have cooperated
she could have cooperated
we could have cooperated
you could have cooperated
they could have cooperated	I could have been cooperating
you could have been cooperating
she could have been cooperating
we could have been cooperating
you could have been cooperating
they could have been cooperating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not cooperate
you could not cooperate
she could not cooperate
we could not cooperate
you could not cooperate
they could not cooperate 	I could not be cooperating
you could not be cooperating
she could not be cooperating
we could not be cooperating
you could not be cooperating
they could not be cooperating	I could not have cooperated
you could not have cooperated
she could not have cooperated
we could not have cooperated
you could not have cooperated
they could not have cooperated	I could not have been cooperating
you could not have been cooperating
she could not have been cooperating
we could not have been cooperating
you could not have been cooperating
they could not have been cooperating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cooperate?
could you cooperate?
could she cooperate?
could we cooperate?
could you cooperate?
could they cooperate? 	could I be cooperating?
could you be cooperating?
could she be cooperating?
could we be cooperating?
could you be cooperating?
could they be cooperating? 	could I have cooperated?
could you have cooperated?
could she have cooperated?
could we have cooperated?
could you have cooperated?
could they have cooperated? 	could I have been cooperating?
could you have been cooperating?
could she have been cooperating?
could we have been cooperating?
could you have been cooperating?
could they have been cooperating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not cooperate?
could you not cooperate?
could she not cooperate?
could we not cooperate?
could you not cooperate?
could they not cooperate? 	could I not be cooperating?
could you not be cooperating?
could she not be cooperating?
could we not be cooperating?
could you not be cooperating?
could they not be cooperating? 	could I not have cooperated?
could you not have cooperated?
could she not have cooperated?
could we not have cooperated?
could you not have cooperated?
could they not have cooperated? 	could I not have been cooperating?
could you not have been cooperating?
could she not have been cooperating?
could we not have been cooperating?
could you not have been cooperating?
could they not have been cooperating?