I could boast you could boast he could boast we could boast you could boast they could boast
Forma con V-ing
I could be boasting you could be boasting he could be boasting we could be boasting you could be boasting they could be boasting
Perfecto
I could have boasted you could have boasted he could have boasted we could have boasted you could have boasted they could have boasted
Perfecto con V-ing
I could have been boasting you could have been boasting he could have been boasting we could have been boasting you could have been boasting they could have been boasting
Negación
Forma simple
I could not boast you could not boast he could not boast we could not boast you could not boast they could not boast
Forma con V-ing
I could not be boasting you could not be boasting he could not be boasting we could not be boasting you could not be boasting they could not be boasting
Perfecto
I could not have boasted you could not have boasted he could not have boasted we could not have boasted you could not have boasted they could not have boasted
Perfecto con V-ing
I could not have been boasting you could not have been boasting he could not have been boasting we could not have been boasting you could not have been boasting they could not have been boasting
Forma interrogativa
Forma simple
could I boast? could you boast? could he boast? could we boast? could you boast? could they boast?
Forma con V-ing
could I be boasting? could you be boasting? could he be boasting? could we be boasting? could you be boasting? could they be boasting?
Perfecto
could I have boasted? could you have boasted? could he have boasted? could we have boasted? could you have boasted? could they have boasted?
Perfecto con V-ing
could I have been boasting? could you have been boasting? could he have been boasting? could we have been boasting? could you have been boasting? could they have been boasting?
Forma interro-negativa
Forma simple
could I not boast? could you not boast? could he not boast? could we not boast? could you not boast? could they not boast?
Forma con V-ing
could I not be boasting? could you not be boasting? could he not be boasting? could we not be boasting? could you not be boasting? could they not be boasting?
Perfecto
could I not have boasted? could you not have boasted? could he not have boasted? could we not have boasted? could you not have boasted? could they not have boasted?
Perfecto con V-ing
could I not have been boasting? could you not have been boasting? could he not have been boasting? could we not have been boasting? could you not have been boasting? could they not have been boasting?