can wall
Regular verb: wall - walled- walled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can wall
you can wall
he can wall
we can wall
you can wall
they can wall 	I can be walling
you can be walling
he can be walling
we can be walling
you can be walling
they can be walling	I can have walled
you can have walled
he can have walled
we can have walled
you can have walled
they can have walled	I can have been walling
you can have been walling
he can have been walling
we can have been walling
you can have been walling
they can have been walling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't wall
you can't wall
he can't wall
we can't wall
you can't wall
they can't wall 	I can't be walling
you can't be walling
he can't be walling
we can't be walling
you can't be walling
they can't be walling	I can't have walled
you can't have walled
he can't have walled
we can't have walled
you can't have walled
they can't have walled	I can't have been walling
you can't have been walling
he can't have been walling
we can't have been walling
you can't have been walling
they can't have been walling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I wall?
can you wall?
can he wall?
can we wall?
can you wall?
can they wall? 	can I be walling?
can you be walling?
can he be walling?
can we be walling?
can you be walling?
can they be walling? 	can I have walled?
can you have walled?
can he have walled?
can we have walled?
can you have walled?
can they have walled? 	can I have been walling?
can you have been walling?
can he have been walling?
can we have been walling?
can you have been walling?
can they have been walling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I wall?
can't you wall?
can't he wall?
can't we wall?
can't you wall?
can't they wall? 	can't I be walling?
can't you be walling?
can't he be walling?
can't we be walling?
can't you be walling?
can't they be walling? 	can't I have walled?
can't you have walled?
can't he have walled?
can't we have walled?
can't you have walled?
can't they have walled? 	can't I have been walling?
can't you have been walling?
can't he have been walling?
can't we have been walling?
can't you have been walling?
can't they have been walling?