must subscribe
Regular verb: subscribe - subscribed- subscribed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must subscribe
you must subscribe
she must subscribe
we must subscribe
you must subscribe
they must subscribe 	I must be subscribing
you must be subscribing
she must be subscribing
we must be subscribing
you must be subscribing
they must be subscribing	I must have subscribed
you must have subscribed
she 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
she 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 	Perfect 	V-ing perfect 	
I mustn't subscribe
you mustn't subscribe
she 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
she mustn't be subscribing
we mustn't be subscribing
you mustn't be subscribing
they mustn't be subscribing	I mustn't have subscribed
you mustn't have subscribed
she 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
she 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 	Perfect 	V-ing perfect 	
must I subscribe?
must you subscribe?
must she subscribe?
must we subscribe?
must you subscribe?
must they subscribe? 	must I be subscribing?
must you be subscribing?
must she be subscribing?
must we be subscribing?
must you be subscribing?
must they be subscribing? 	must I have subscribed?
must you have subscribed?
must she 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 she 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 	Perfect 	V-ing perfect 	
mustn't I subscribe?
mustn't you subscribe?
mustn't she 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 she be subscribing?
mustn't we be subscribing?
mustn't you be subscribing?
mustn't they be subscribing? 	mustn't I have subscribed?
mustn't you have subscribed?
mustn't she 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 she have been subscribing?
mustn't we have been subscribing?
mustn't you have been subscribing?
mustn't they have been subscribing?