I could classify you could classify she could classify we could classify you could classify they could classify
Forma con V-ing
I could be classifying you could be classifying she could be classifying we could be classifying you could be classifying they could be classifying
Perfecto
I could have classified you could have classified she could have classified we could have classified you could have classified they could have classified
Perfecto con V-ing
I could have been classifying you could have been classifying she could have been classifying we could have been classifying you could have been classifying they could have been classifying
Negación
Forma simple
I could not classify you could not classify she could not classify we could not classify you could not classify they could not classify
Forma con V-ing
I could not be classifying you could not be classifying she could not be classifying we could not be classifying you could not be classifying they could not be classifying
Perfecto
I could not have classified you could not have classified she could not have classified we could not have classified you could not have classified they could not have classified
Perfecto con V-ing
I could not have been classifying you could not have been classifying she could not have been classifying we could not have been classifying you could not have been classifying they could not have been classifying
Forma interrogativa
Forma simple
could I classify? could you classify? could she classify? could we classify? could you classify? could they classify?
Forma con V-ing
could I be classifying? could you be classifying? could she be classifying? could we be classifying? could you be classifying? could they be classifying?
Perfecto
could I have classified? could you have classified? could she have classified? could we have classified? could you have classified? could they have classified?
Perfecto con V-ing
could I have been classifying? could you have been classifying? could she have been classifying? could we have been classifying? could you have been classifying? could they have been classifying?
Forma interro-negativa
Forma simple
could I not classify? could you not classify? could she not classify? could we not classify? could you not classify? could they not classify?
Forma con V-ing
could I not be classifying? could you not be classifying? could she not be classifying? could we not be classifying? could you not be classifying? could they not be classifying?
Perfecto
could I not have classified? could you not have classified? could she not have classified? could we not have classified? could you not have classified? could they not have classified?
Perfecto con V-ing
could I not have been classifying? could you not have been classifying? could she not have been classifying? could we not have been classifying? could you not have been classifying? could they not have been classifying?