I could starch you could starch he could starch we could starch you could starch they could starch
Forma con V-ing
I could be starching you could be starching he could be starching we could be starching you could be starching they could be starching
Perfecto
I could have starched you could have starched he could have starched we could have starched you could have starched they could have starched
Perfecto con V-ing
I could have been starching you could have been starching he could have been starching we could have been starching you could have been starching they could have been starching
Negación
Forma simple
I could not starch you could not starch he could not starch we could not starch you could not starch they could not starch
Forma con V-ing
I could not be starching you could not be starching he could not be starching we could not be starching you could not be starching they could not be starching
Perfecto
I could not have starched you could not have starched he could not have starched we could not have starched you could not have starched they could not have starched
Perfecto con V-ing
I could not have been starching you could not have been starching he could not have been starching we could not have been starching you could not have been starching they could not have been starching
Forma interrogativa
Forma simple
could I starch? could you starch? could he starch? could we starch? could you starch? could they starch?
Forma con V-ing
could I be starching? could you be starching? could he be starching? could we be starching? could you be starching? could they be starching?
Perfecto
could I have starched? could you have starched? could he have starched? could we have starched? could you have starched? could they have starched?
Perfecto con V-ing
could I have been starching? could you have been starching? could he have been starching? could we have been starching? could you have been starching? could they have been starching?
Forma interro-negativa
Forma simple
could I not starch? could you not starch? could he not starch? could we not starch? could you not starch? could they not starch?
Forma con V-ing
could I not be starching? could you not be starching? could he not be starching? could we not be starching? could you not be starching? could they not be starching?
Perfecto
could I not have starched? could you not have starched? could he not have starched? could we not have starched? could you not have starched? could they not have starched?
Perfecto con V-ing
could I not have been starching? could you not have been starching? could he not have been starching? could we not have been starching? could you not have been starching? could they not have been starching?