I could concrete you could concrete she could concrete we could concrete you could concrete they could concrete
Forma con V-ing
I could be concreting you could be concreting she could be concreting we could be concreting you could be concreting they could be concreting
Perfecto
I could have concreted you could have concreted she could have concreted we could have concreted you could have concreted they could have concreted
Perfecto con V-ing
I could have been concreting you could have been concreting she could have been concreting we could have been concreting you could have been concreting they could have been concreting
Negación
Forma simple
I could not concrete you could not concrete she could not concrete we could not concrete you could not concrete they could not concrete
Forma con V-ing
I could not be concreting you could not be concreting she could not be concreting we could not be concreting you could not be concreting they could not be concreting
Perfecto
I could not have concreted you could not have concreted she could not have concreted we could not have concreted you could not have concreted they could not have concreted
Perfecto con V-ing
I could not have been concreting you could not have been concreting she could not have been concreting we could not have been concreting you could not have been concreting they could not have been concreting
Forma interrogativa
Forma simple
could I concrete? could you concrete? could she concrete? could we concrete? could you concrete? could they concrete?
Forma con V-ing
could I be concreting? could you be concreting? could she be concreting? could we be concreting? could you be concreting? could they be concreting?
Perfecto
could I have concreted? could you have concreted? could she have concreted? could we have concreted? could you have concreted? could they have concreted?
Perfecto con V-ing
could I have been concreting? could you have been concreting? could she have been concreting? could we have been concreting? could you have been concreting? could they have been concreting?
Forma interro-negativa
Forma simple
could I not concrete? could you not concrete? could she not concrete? could we not concrete? could you not concrete? could they not concrete?
Forma con V-ing
could I not be concreting? could you not be concreting? could she not be concreting? could we not be concreting? could you not be concreting? could they not be concreting?
Perfecto
could I not have concreted? could you not have concreted? could she not have concreted? could we not have concreted? could you not have concreted? could they not have concreted?
Perfecto con V-ing
could I not have been concreting? could you not have been concreting? could she not have been concreting? could we not have been concreting? could you not have been concreting? could they not have been concreting?