English verb conjugation
MUST SPEC

Regular verb: spec - speced - speced

Affirmation

Simple form	V-ing form
I must spec you must spec he must spec we must spec you must spec they must spec	I must be specing you must be specing he must be specing we must be specing you must be specing they must be specing
Perfect	V-ing perfect
I must have speced you must have speced he must have speced we must have speced you must have speced they must have speced	I must have been specing you must have been specing he must have been specing we must have been specing you must have been specing they must have been specing

Negation

Simple form	V-ing form
I must not spec you must not spec he must not spec we must not spec you must not spec they must not spec	I must not be specing you must not be specing he must not be specing we must not be specing you must not be specing they must not be specing
Perfect	V-ing perfect
I must not have speced you must not have speced he must not have speced we must not have speced you must not have speced they must not have speced	I must not have been specing you must not have been specing he must not have been specing we must not have been specing you must not have been specing they must not have been specing

Interrogative form

Simple form	V-ing form
must I spec? must you spec? must he spec? must we spec? must you spec? must they spec?	must I be specing? must you be specing? must he be specing? must we be specing? must you be specing? must they be specing?
Perfect	V-ing perfect
must I have speced? must you have speced? must he have speced? must we have speced? must you have speced? must they have speced?	must I have been specing? must you have been specing? must he have been specing? must we have been specing? must you have been specing? must they have been specing?

Interro-negative form

Simple form	V-ing form
must I not spec? must you not spec? must he not spec? must we not spec? must you not spec? must they not spec?	must I not be specing? must you not be specing? must he not be specing? must we not be specing? must you not be specing? must they not be specing?
Perfect	V-ing perfect
must I not have speced? must you not have speced? must he not have speced? must we not have speced? must you not have speced? must they not have speced?	must I not have been specing? must you not have been specing? must he not have been specing? must we not have been specing? must you not have been specing? must they not have been specing?