English verb conjugation
CAN VOW

Regular verb: vow - vowed - vowed

Affirmation

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

Interrogative form

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