English verb conjugation
COULD ROC

Regular verb: roc - roced - roced

Affirmation

Simple form	V-ing form
I could roc you could roc he could roc we could roc you could roc they could roc	I could be rocing you could be rocing he could be rocing we could be rocing you could be rocing they could be rocing
Perfect	V-ing perfect
I could have roced you could have roced he could have roced we could have roced you could have roced they could have roced	I could have been rocing you could have been rocing he could have been rocing we could have been rocing you could have been rocing they could have been rocing

Negation

Simple form	V-ing form
I could not roc you could not roc he could not roc we could not roc you could not roc they could not roc	I could not be rocing you could not be rocing he could not be rocing we could not be rocing you could not be rocing they could not be rocing
Perfect	V-ing perfect
I could not have roced you could not have roced he could not have roced we could not have roced you could not have roced they could not have roced	I could not have been rocing you could not have been rocing he could not have been rocing we could not have been rocing you could not have been rocing they could not have been rocing

Interrogative form

Simple form	V-ing form
could I roc? could you roc? could he roc? could we roc? could you roc? could they roc?	could I be rocing? could you be rocing? could he be rocing? could we be rocing? could you be rocing? could they be rocing?
Perfect	V-ing perfect
could I have roced? could you have roced? could he have roced? could we have roced? could you have roced? could they have roced?	could I have been rocing? could you have been rocing? could he have been rocing? could we have been rocing? could you have been rocing? could they have been rocing?

Interro-negative form

Simple form	V-ing form
could I not roc? could you not roc? could he not roc? could we not roc? could you not roc? could they not roc?	could I not be rocing? could you not be rocing? could he not be rocing? could we not be rocing? could you not be rocing? could they not be rocing?
Perfect	V-ing perfect
could I not have roced? could you not have roced? could he not have roced? could we not have roced? could you not have roced? could they not have roced?	could I not have been rocing? could you not have been rocing? could he not have been rocing? could we not have been rocing? could you not have been rocing? could they not have been rocing?