must betray
Regular verb: betray - betrayed- betrayed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must betray
you must betray
he must betray
we must betray
you must betray
they must betray 	I must be betraying
you must be betraying
he must be betraying
we must be betraying
you must be betraying
they must be betraying	I must have betrayed
you must have betrayed
he must have betrayed
we must have betrayed
you must have betrayed
they must have betrayed	I must have been betraying
you must have been betraying
he must have been betraying
we must have been betraying
you must have been betraying
they must have been betraying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not betray
you must not betray
he must not betray
we must not betray
you must not betray
they must not betray 	I must not be betraying
you must not be betraying
he must not be betraying
we must not be betraying
you must not be betraying
they must not be betraying	I must not have betrayed
you must not have betrayed
he must not have betrayed
we must not have betrayed
you must not have betrayed
they must not have betrayed	I must not have been betraying
you must not have been betraying
he must not have been betraying
we must not have been betraying
you must not have been betraying
they must not have been betraying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I betray?
must you betray?
must he betray?
must we betray?
must you betray?
must they betray? 	must I be betraying?
must you be betraying?
must he be betraying?
must we be betraying?
must you be betraying?
must they be betraying? 	must I have betrayed?
must you have betrayed?
must he have betrayed?
must we have betrayed?
must you have betrayed?
must they have betrayed? 	must I have been betraying?
must you have been betraying?
must he have been betraying?
must we have been betraying?
must you have been betraying?
must they have been betraying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not betray?
must you not betray?
must he not betray?
must we not betray?
must you not betray?
must they not betray? 	must I not be betraying?
must you not be betraying?
must he not be betraying?
must we not be betraying?
must you not be betraying?
must they not be betraying? 	must I not have betrayed?
must you not have betrayed?
must he not have betrayed?
must we not have betrayed?
must you not have betrayed?
must they not have betrayed? 	must I not have been betraying?
must you not have been betraying?
must he not have been betraying?
must we not have been betraying?
must you not have been betraying?
must they not have been betraying?