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 mustn't subscribe you mustn't subscribe he mustn't subscribe we mustn't subscribe you mustn't subscribe they mustn't subscribe	I mustn't be subscribing you mustn't be subscribing he mustn't be subscribing we mustn't be subscribing you mustn't be subscribing they mustn't be subscribing
Perfect	V-ing perfect
I mustn't have subscribed you mustn't have subscribed he mustn't have subscribed we mustn't have subscribed you mustn't have subscribed they mustn't have subscribed	I mustn't have been subscribing you mustn't have been subscribing he mustn't have been subscribing we mustn't have been subscribing you mustn't have been subscribing they mustn't 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
mustn't I subscribe? mustn't you subscribe? mustn't he subscribe? mustn't we subscribe? mustn't you subscribe? mustn't they subscribe?	mustn't I be subscribing? mustn't you be subscribing? mustn't he be subscribing? mustn't we be subscribing? mustn't you be subscribing? mustn't they be subscribing?
Perfect	V-ing perfect
mustn't I have subscribed? mustn't you have subscribed? mustn't he have subscribed? mustn't we have subscribed? mustn't you have subscribed? mustn't they have subscribed?	mustn't I have been subscribing? mustn't you have been subscribing? mustn't he have been subscribing? mustn't we have been subscribing? mustn't you have been subscribing? mustn't they have been subscribing?