could cooperate
Verbo regular: cooperate - cooperated- cooperated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could cooperate
you could cooperate
he could cooperate
we could cooperate
you could cooperate
they could cooperate 	I could be cooperating
you could be cooperating
he could be cooperating
we could be cooperating
you could be cooperating
they could be cooperating	I could have cooperated
you could have cooperated
he 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
he could have been cooperating
we could have been cooperating
you could have been cooperating
they could have been cooperating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not cooperate
you could not cooperate
he 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
he 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
he 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
he could not have been cooperating
we could not have been cooperating
you could not have been cooperating
they could not have been cooperating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I cooperate?
could you cooperate?
could he cooperate?
could we cooperate?
could you cooperate?
could they cooperate? 	could I be cooperating?
could you be cooperating?
could he be cooperating?
could we be cooperating?
could you be cooperating?
could they be cooperating? 	could I have cooperated?
could you have cooperated?
could he 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 he have been cooperating?
could we have been cooperating?
could you have been cooperating?
could they have been cooperating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not cooperate?
could you not cooperate?
could he 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 he 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 he 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 he not have been cooperating?
could we not have been cooperating?
could you not have been cooperating?
could they not have been cooperating?