English verb conjugation
COULD DISC

Regular verb: disc - disced - disced

Affirmation

Simple form	V-ing form
I could disc you could disc she could disc we could disc you could disc they could disc	I could be discing you could be discing she could be discing we could be discing you could be discing they could be discing
Perfect	V-ing perfect
I could have disced you could have disced she could have disced we could have disced you could have disced they could have disced	I could have been discing you could have been discing she could have been discing we could have been discing you could have been discing they could have been discing

Negation

Simple form	V-ing form
I could not disc you could not disc she could not disc we could not disc you could not disc they could not disc	I could not be discing you could not be discing she could not be discing we could not be discing you could not be discing they could not be discing
Perfect	V-ing perfect
I could not have disced you could not have disced she could not have disced we could not have disced you could not have disced they could not have disced	I could not have been discing you could not have been discing she could not have been discing we could not have been discing you could not have been discing they could not have been discing

Interrogative form

Simple form	V-ing form
could I disc? could you disc? could she disc? could we disc? could you disc? could they disc?	could I be discing? could you be discing? could she be discing? could we be discing? could you be discing? could they be discing?
Perfect	V-ing perfect
could I have disced? could you have disced? could she have disced? could we have disced? could you have disced? could they have disced?	could I have been discing? could you have been discing? could she have been discing? could we have been discing? could you have been discing? could they have been discing?

Interro-negative form

Simple form	V-ing form
could I not disc? could you not disc? could she not disc? could we not disc? could you not disc? could they not disc?	could I not be discing? could you not be discing? could she not be discing? could we not be discing? could you not be discing? could they not be discing?
Perfect	V-ing perfect
could I not have disced? could you not have disced? could she not have disced? could we not have disced? could you not have disced? could they not have disced?	could I not have been discing? could you not have been discing? could she not have been discing? could we not have been discing? could you not have been discing? could they not have been discing?