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 couldn't shoal you couldn't shoal he couldn't shoal we couldn't shoal you couldn't shoal they couldn't shoal	I couldn't be shoaling you couldn't be shoaling he couldn't be shoaling we couldn't be shoaling you couldn't be shoaling they couldn't be shoaling
Perfect	V-ing perfect
I couldn't have shoaled you couldn't have shoaled he couldn't have shoaled we couldn't have shoaled you couldn't have shoaled they couldn't have shoaled	I couldn't have been shoaling you couldn't have been shoaling he couldn't have been shoaling we couldn't have been shoaling you couldn't have been shoaling they couldn't 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
couldn't I shoal? couldn't you shoal? couldn't he shoal? couldn't we shoal? couldn't you shoal? couldn't they shoal?	couldn't I be shoaling? couldn't you be shoaling? couldn't he be shoaling? couldn't we be shoaling? couldn't you be shoaling? couldn't they be shoaling?
Perfect	V-ing perfect
couldn't I have shoaled? couldn't you have shoaled? couldn't he have shoaled? couldn't we have shoaled? couldn't you have shoaled? couldn't they have shoaled?	couldn't I have been shoaling? couldn't you have been shoaling? couldn't he have been shoaling? couldn't we have been shoaling? couldn't you have been shoaling? couldn't they have been shoaling?