must avenge
Regular verb: avenge - avenged- avenged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must avenge
you must avenge
she must avenge
we must avenge
you must avenge
they must avenge 	I must be avenging
you must be avenging
she must be avenging
we must be avenging
you must be avenging
they must be avenging	I must have avenged
you must have avenged
she must have avenged
we must have avenged
you must have avenged
they must have avenged	I must have been avenging
you must have been avenging
she must have been avenging
we must have been avenging
you must have been avenging
they must have been avenging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not avenge
you must not avenge
she must not avenge
we must not avenge
you must not avenge
they must not avenge 	I must not be avenging
you must not be avenging
she must not be avenging
we must not be avenging
you must not be avenging
they must not be avenging	I must not have avenged
you must not have avenged
she must not have avenged
we must not have avenged
you must not have avenged
they must not have avenged	I must not have been avenging
you must not have been avenging
she must not have been avenging
we must not have been avenging
you must not have been avenging
they must not have been avenging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I avenge?
must you avenge?
must she avenge?
must we avenge?
must you avenge?
must they avenge? 	must I be avenging?
must you be avenging?
must she be avenging?
must we be avenging?
must you be avenging?
must they be avenging? 	must I have avenged?
must you have avenged?
must she have avenged?
must we have avenged?
must you have avenged?
must they have avenged? 	must I have been avenging?
must you have been avenging?
must she have been avenging?
must we have been avenging?
must you have been avenging?
must they have been avenging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not avenge?
must you not avenge?
must she not avenge?
must we not avenge?
must you not avenge?
must they not avenge? 	must I not be avenging?
must you not be avenging?
must she not be avenging?
must we not be avenging?
must you not be avenging?
must they not be avenging? 	must I not have avenged?
must you not have avenged?
must she not have avenged?
must we not have avenged?
must you not have avenged?
must they not have avenged? 	must I not have been avenging?
must you not have been avenging?
must she not have been avenging?
must we not have been avenging?
must you not have been avenging?
must they not have been avenging?