can vow
Regular verb: vow - vowed- vowed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't vow
you can't vow
he can't vow
we can't vow
you can't vow
they can't vow 	I can't be vowing
you can't be vowing
he can't be vowing
we can't be vowing
you can't be vowing
they can't be vowing	I can't have vowed
you can't have vowed
he can't have vowed
we can't have vowed
you can't have vowed
they can't have vowed	I can't have been vowing
you can't have been vowing
he can't have been vowing
we can't have been vowing
you can't have been vowing
they can't have been vowing	

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

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