can wail
Regular verb: wail - wailed- wailed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can wail
you can wail
he can wail
we can wail
you can wail
they can wail 	I can be wailing
you can be wailing
he can be wailing
we can be wailing
you can be wailing
they can be wailing	I can have wailed
you can have wailed
he can have wailed
we can have wailed
you can have wailed
they can have wailed	I can have been wailing
you can have been wailing
he can have been wailing
we can have been wailing
you can have been wailing
they can have been wailing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't wail
you can't wail
he can't wail
we can't wail
you can't wail
they can't wail 	I can't be wailing
you can't be wailing
he can't be wailing
we can't be wailing
you can't be wailing
they can't be wailing	I can't have wailed
you can't have wailed
he can't have wailed
we can't have wailed
you can't have wailed
they can't have wailed	I can't have been wailing
you can't have been wailing
he can't have been wailing
we can't have been wailing
you can't have been wailing
they can't have been wailing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I wail?
can you wail?
can he wail?
can we wail?
can you wail?
can they wail? 	can I be wailing?
can you be wailing?
can he be wailing?
can we be wailing?
can you be wailing?
can they be wailing? 	can I have wailed?
can you have wailed?
can he have wailed?
can we have wailed?
can you have wailed?
can they have wailed? 	can I have been wailing?
can you have been wailing?
can he have been wailing?
can we have been wailing?
can you have been wailing?
can they have been wailing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I wail?
can't you wail?
can't he wail?
can't we wail?
can't you wail?
can't they wail? 	can't I be wailing?
can't you be wailing?
can't he be wailing?
can't we be wailing?
can't you be wailing?
can't they be wailing? 	can't I have wailed?
can't you have wailed?
can't he have wailed?
can't we have wailed?
can't you have wailed?
can't they have wailed? 	can't I have been wailing?
can't you have been wailing?
can't he have been wailing?
can't we have been wailing?
can't you have been wailing?
can't they have been wailing?