English verb conjugation
MUST SUBSCRIBE

Regular verb: subscribe - subscribed - subscribed

Affirmation

Simple form	V-ing form
I must subscribe you must subscribe he must subscribe we must subscribe you must subscribe they must subscribe	I must be subscribing you must be subscribing he must be subscribing we must be subscribing you must be subscribing they must be subscribing
Perfect	V-ing perfect
I must have subscribed you must have subscribed he must have subscribed we must have subscribed you must have subscribed they must have subscribed	I must have been subscribing you must have been subscribing he must have been subscribing we must have been subscribing you must have been subscribing they must have been subscribing

Negation

Simple form	V-ing form
I must not subscribe you must not subscribe he must not subscribe we must not subscribe you must not subscribe they must not subscribe	I must not be subscribing you must not be subscribing he must not be subscribing we must not be subscribing you must not be subscribing they must not be subscribing
Perfect	V-ing perfect
I must not have subscribed you must not have subscribed he must not have subscribed we must not have subscribed you must not have subscribed they must not have subscribed	I must not have been subscribing you must not have been subscribing he must not have been subscribing we must not have been subscribing you must not have been subscribing they must not have been subscribing

Interrogative form

Simple form	V-ing form
must I subscribe? must you subscribe? must he subscribe? must we subscribe? must you subscribe? must they subscribe?	must I be subscribing? must you be subscribing? must he be subscribing? must we be subscribing? must you be subscribing? must they be subscribing?
Perfect	V-ing perfect
must I have subscribed? must you have subscribed? must he have subscribed? must we have subscribed? must you have subscribed? must they have subscribed?	must I have been subscribing? must you have been subscribing? must he have been subscribing? must we have been subscribing? must you have been subscribing? must they have been subscribing?

Interro-negative form

Simple form	V-ing form
must I not subscribe? must you not subscribe? must he not subscribe? must we not subscribe? must you not subscribe? must they not subscribe?	must I not be subscribing? must you not be subscribing? must he not be subscribing? must we not be subscribing? must you not be subscribing? must they not be subscribing?
Perfect	V-ing perfect
must I not have subscribed? must you not have subscribed? must he not have subscribed? must we not have subscribed? must you not have subscribed? must they not have subscribed?	must I not have been subscribing? must you not have been subscribing? must he not have been subscribing? must we not have been subscribing? must you not have been subscribing? must they not have been subscribing?