English verb conjugation
MUST DISC

Regular verb: disc - disced - disced

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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