I could concur you could concur she could concur we could concur you could concur they could concur
Forma con V-ing
I could be concurring you could be concurring she could be concurring we could be concurring you could be concurring they could be concurring
Perfecto
I could have concurred you could have concurred she could have concurred we could have concurred you could have concurred they could have concurred
Perfecto con V-ing
I could have been concurring you could have been concurring she could have been concurring we could have been concurring you could have been concurring they could have been concurring
Negación
Forma simple
I could not concur you could not concur she could not concur we could not concur you could not concur they could not concur
Forma con V-ing
I could not be concurring you could not be concurring she could not be concurring we could not be concurring you could not be concurring they could not be concurring
Perfecto
I could not have concurred you could not have concurred she could not have concurred we could not have concurred you could not have concurred they could not have concurred
Perfecto con V-ing
I could not have been concurring you could not have been concurring she 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
could I concur? could you concur? could she concur? could we concur? could you concur? could they concur?
Forma con V-ing
could I be concurring? could you be concurring? could she be concurring? could we be concurring? could you be concurring? could they be concurring?
Perfecto
could I have concurred? could you have concurred? could she have concurred? could we have concurred? could you have concurred? could they have concurred?
Perfecto con V-ing
could I have been concurring? could you have been concurring? could she have been concurring? could we have been concurring? could you have been concurring? could they have been concurring?
Forma interro-negativa
Forma simple
could I not concur? could you not concur? could she not concur? could we not concur? could you not concur? could they not concur?
Forma con V-ing
could I not be concurring? could you not be concurring? could she not be concurring? could we not be concurring? could you not be concurring? could they not be concurring?
Perfecto
could I not have concurred? could you not have concurred? could she not have concurred? could we not have concurred? could you not have concurred? could they not have concurred?
Perfecto con V-ing
could I not have been concurring? could you not have been concurring? could she not have been concurring? could we not have been concurring? could you not have been concurring? could they not have been concurring?