English verb conjugation
COULD WALL

Regular verb: wall - walled - walled

Affirmation

Simple form	V-ing form
I could wall you could wall she could wall we could wall you could wall they could wall	I could be walling you could be walling she could be walling we could be walling you could be walling they could be walling
Perfect	V-ing perfect
I could have walled you could have walled she could have walled we could have walled you could have walled they could have walled	I could have been walling you could have been walling she could have been walling we could have been walling you could have been walling they could have been walling

Negation

Simple form	V-ing form
I couldn't wall you couldn't wall she couldn't wall we couldn't wall you couldn't wall they couldn't wall	I couldn't be walling you couldn't be walling she couldn't be walling we couldn't be walling you couldn't be walling they couldn't be walling
Perfect	V-ing perfect
I couldn't have walled you couldn't have walled she couldn't have walled we couldn't have walled you couldn't have walled they couldn't have walled	I couldn't have been walling you couldn't have been walling she couldn't have been walling we couldn't have been walling you couldn't have been walling they couldn't have been walling

Interrogative form

Simple form	V-ing form
could I wall? could you wall? could she wall? could we wall? could you wall? could they wall?	could I be walling? could you be walling? could she be walling? could we be walling? could you be walling? could they be walling?
Perfect	V-ing perfect
could I have walled? could you have walled? could she have walled? could we have walled? could you have walled? could they have walled?	could I have been walling? could you have been walling? could she have been walling? could we have been walling? could you have been walling? could they have been walling?

Interro-negative form

Simple form	V-ing form
couldn't I wall? couldn't you wall? couldn't she wall? couldn't we wall? couldn't you wall? couldn't they wall?	couldn't I be walling? couldn't you be walling? couldn't she be walling? couldn't we be walling? couldn't you be walling? couldn't they be walling?
Perfect	V-ing perfect
couldn't I have walled? couldn't you have walled? couldn't she have walled? couldn't we have walled? couldn't you have walled? couldn't they have walled?	couldn't I have been walling? couldn't you have been walling? couldn't she have been walling? couldn't we have been walling? couldn't you have been walling? couldn't they have been walling?