can vail
Regular verb: vail - vailed- vailed

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