I could correct you could correct he could correct we could correct you could correct they could correct
Forma con V-ing
I could be correcting you could be correcting he could be correcting we could be correcting you could be correcting they could be correcting
Perfecto
I could have corrected you could have corrected he could have corrected we could have corrected you could have corrected they could have corrected
Perfecto con V-ing
I could have been correcting you could have been correcting he could have been correcting we could have been correcting you could have been correcting they could have been correcting
Negación
Forma simple
I couldn't correct you couldn't correct he couldn't correct we couldn't correct you couldn't correct they couldn't correct
Forma con V-ing
I couldn't be correcting you couldn't be correcting he couldn't be correcting we couldn't be correcting you couldn't be correcting they couldn't be correcting
Perfecto
I couldn't have corrected you couldn't have corrected he couldn't have corrected we couldn't have corrected you couldn't have corrected they couldn't have corrected
Perfecto con V-ing
I couldn't have been correcting you couldn't have been correcting he couldn't have been correcting we couldn't have been correcting you couldn't have been correcting they couldn't have been correcting
Forma interrogativa
Forma simple
could I correct? could you correct? could he correct? could we correct? could you correct? could they correct?
Forma con V-ing
could I be correcting? could you be correcting? could he be correcting? could we be correcting? could you be correcting? could they be correcting?
Perfecto
could I have corrected? could you have corrected? could he have corrected? could we have corrected? could you have corrected? could they have corrected?
Perfecto con V-ing
could I have been correcting? could you have been correcting? could he have been correcting? could we have been correcting? could you have been correcting? could they have been correcting?
Forma interro-negativa
Forma simple
couldn't I correct? couldn't you correct? couldn't he correct? couldn't we correct? couldn't you correct? couldn't they correct?
Forma con V-ing
couldn't I be correcting? couldn't you be correcting? couldn't he be correcting? couldn't we be correcting? couldn't you be correcting? couldn't they be correcting?
Perfecto
couldn't I have corrected? couldn't you have corrected? couldn't he have corrected? couldn't we have corrected? couldn't you have corrected? couldn't they have corrected?
Perfecto con V-ing
couldn't I have been correcting? couldn't you have been correcting? couldn't he have been correcting? couldn't we have been correcting? couldn't you have been correcting? couldn't they have been correcting?