English verb conjugation
COULD SHOAL

Regular verb: shoal - shoaled - shoaled

Affirmation

Simple form	V-ing form
I could shoal you could shoal he could shoal we could shoal you could shoal they could shoal	I could be shoaling you could be shoaling he could be shoaling we could be shoaling you could be shoaling they could be shoaling
Perfect	V-ing perfect
I could have shoaled you could have shoaled he could have shoaled we could have shoaled you could have shoaled they could have shoaled	I could have been shoaling you could have been shoaling he could have been shoaling we could have been shoaling you could have been shoaling they could have been shoaling

Negation

Simple form	V-ing form
I could not shoal you could not shoal he could not shoal we could not shoal you could not shoal they could not shoal	I could not be shoaling you could not be shoaling he could not be shoaling we could not be shoaling you could not be shoaling they could not be shoaling
Perfect	V-ing perfect
I could not have shoaled you could not have shoaled he could not have shoaled we could not have shoaled you could not have shoaled they could not have shoaled	I could not have been shoaling you could not have been shoaling he could not have been shoaling we could not have been shoaling you could not have been shoaling they could not have been shoaling

Interrogative form

Simple form	V-ing form
could I shoal? could you shoal? could he shoal? could we shoal? could you shoal? could they shoal?	could I be shoaling? could you be shoaling? could he be shoaling? could we be shoaling? could you be shoaling? could they be shoaling?
Perfect	V-ing perfect
could I have shoaled? could you have shoaled? could he have shoaled? could we have shoaled? could you have shoaled? could they have shoaled?	could I have been shoaling? could you have been shoaling? could he have been shoaling? could we have been shoaling? could you have been shoaling? could they have been shoaling?

Interro-negative form

Simple form	V-ing form
could I not shoal? could you not shoal? could he not shoal? could we not shoal? could you not shoal? could they not shoal?	could I not be shoaling? could you not be shoaling? could he not be shoaling? could we not be shoaling? could you not be shoaling? could they not be shoaling?
Perfect	V-ing perfect
could I not have shoaled? could you not have shoaled? could he not have shoaled? could we not have shoaled? could you not have shoaled? could they not have shoaled?	could I not have been shoaling? could you not have been shoaling? could he not have been shoaling? could we not have been shoaling? could you not have been shoaling? could they not have been shoaling?