could concur
Verbo regular: concur - concurred- concurred

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could concur
you could concur
he could concur
we could concur
you could concur
they could concur 	I could be concurring
you could be concurring
he could be concurring
we could be concurring
you could be concurring
they could be concurring	I could have concurred
you could have concurred
he could have concurred
we could have concurred
you could have concurred
they could have concurred	I could have been concurring
you could have been concurring
he could have been concurring
we could have been concurring
you could have been concurring
they could have been concurring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not concur
you could not concur
he could not concur
we could not concur
you could not concur
they could not concur 	I could not be concurring
you could not be concurring
he could not be concurring
we could not be concurring
you could not be concurring
they could not be concurring	I could not have concurred
you could not have concurred
he could not have concurred
we could not have concurred
you could not have concurred
they could not have concurred	I could not have been concurring
you could not have been concurring
he could not have been concurring
we could not have been concurring
you could not have been concurring
they could not have been concurring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I concur?
could you concur?
could he concur?
could we concur?
could you concur?
could they concur? 	could I be concurring?
could you be concurring?
could he be concurring?
could we be concurring?
could you be concurring?
could they be concurring? 	could I have concurred?
could you have concurred?
could he have concurred?
could we have concurred?
could you have concurred?
could they have concurred? 	could I have been concurring?
could you have been concurring?
could he have been concurring?
could we have been concurring?
could you have been concurring?
could they have been concurring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not concur?
could you not concur?
could he not concur?
could we not concur?
could you not concur?
could they not concur? 	could I not be concurring?
could you not be concurring?
could he not be concurring?
could we not be concurring?
could you not be concurring?
could they not be concurring? 	could I not have concurred?
could you not have concurred?
could he not have concurred?
could we not have concurred?
could you not have concurred?
could they not have concurred? 	could I not have been concurring?
could you not have been concurring?
could he not have been concurring?
could we not have been concurring?
could you not have been concurring?
could they not have been concurring?