must vow
Regular verb: vow - vowed- vowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must vow
you must vow
he must vow
we must vow
you must vow
they must vow 	I must be vowing
you must be vowing
he must be vowing
we must be vowing
you must be vowing
they must be vowing	I must have vowed
you must have vowed
he must have vowed
we must have vowed
you must have vowed
they must have vowed	I must have been vowing
you must have been vowing
he must have been vowing
we must have been vowing
you must have been vowing
they must have been vowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not vow
you must not vow
he must not vow
we must not vow
you must not vow
they must not vow 	I must not be vowing
you must not be vowing
he must not be vowing
we must not be vowing
you must not be vowing
they must not be vowing	I must not have vowed
you must not have vowed
he must not have vowed
we must not have vowed
you must not have vowed
they must not have vowed	I must not have been vowing
you must not have been vowing
he must not have been vowing
we must not have been vowing
you must not have been vowing
they must not have been vowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I vow?
must you vow?
must he vow?
must we vow?
must you vow?
must they vow? 	must I be vowing?
must you be vowing?
must he be vowing?
must we be vowing?
must you be vowing?
must they be vowing? 	must I have vowed?
must you have vowed?
must he have vowed?
must we have vowed?
must you have vowed?
must they have vowed? 	must I have been vowing?
must you have been vowing?
must he have been vowing?
must we have been vowing?
must you have been vowing?
must they have been vowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not vow?
must you not vow?
must he not vow?
must we not vow?
must you not vow?
must they not vow? 	must I not be vowing?
must you not be vowing?
must he not be vowing?
must we not be vowing?
must you not be vowing?
must they not be vowing? 	must I not have vowed?
must you not have vowed?
must he not have vowed?
must we not have vowed?
must you not have vowed?
must they not have vowed? 	must I not have been vowing?
must you not have been vowing?
must he not have been vowing?
must we not have been vowing?
must you not have been vowing?
must they not have been vowing?