can vail
Regular verb: vail - vailed- vailed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can vail
you can vail
she can vail
we can vail
you can vail
they can vail 	I can be vailing
you can be vailing
she can be vailing
we can be vailing
you can be vailing
they can be vailing	I can have vailed
you can have vailed
she can have vailed
we can have vailed
you can have vailed
they can have vailed	I can have been vailing
you can have been vailing
she can have been vailing
we can have been vailing
you can have been vailing
they can have been vailing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't vail
you can't vail
she can't vail
we can't vail
you can't vail
they can't vail 	I can't be vailing
you can't be vailing
she can't be vailing
we can't be vailing
you can't be vailing
they can't be vailing	I can't have vailed
you can't have vailed
she can't have vailed
we can't have vailed
you can't have vailed
they can't have vailed	I can't have been vailing
you can't have been vailing
she can't have been vailing
we can't have been vailing
you can't have been vailing
they can't have been vailing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I vail?
can you vail?
can she vail?
can we vail?
can you vail?
can they vail? 	can I be vailing?
can you be vailing?
can she be vailing?
can we be vailing?
can you be vailing?
can they be vailing? 	can I have vailed?
can you have vailed?
can she have vailed?
can we have vailed?
can you have vailed?
can they have vailed? 	can I have been vailing?
can you have been vailing?
can she have been vailing?
can we have been vailing?
can you have been vailing?
can they have been vailing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I vail?
can't you vail?
can't she vail?
can't we vail?
can't you vail?
can't they vail? 	can't I be vailing?
can't you be vailing?
can't she be vailing?
can't we be vailing?
can't you be vailing?
can't they be vailing? 	can't I have vailed?
can't you have vailed?
can't she have vailed?
can't we have vailed?
can't you have vailed?
can't they have vailed? 	can't I have been vailing?
can't you have been vailing?
can't she have been vailing?
can't we have been vailing?
can't you have been vailing?
can't they have been vailing?