English verb conjugation
COULD OCTUPLE

Regular verb: octuple - octupled - octupled

Affirmation

Simple form	V-ing form
I could octuple you could octuple he could octuple we could octuple you could octuple they could octuple	I could be octupling you could be octupling he could be octupling we could be octupling you could be octupling they could be octupling
Perfect	V-ing perfect
I could have octupled you could have octupled he could have octupled we could have octupled you could have octupled they could have octupled	I could have been octupling you could have been octupling he could have been octupling we could have been octupling you could have been octupling they could have been octupling

Negation

Simple form	V-ing form
I couldn't octuple you couldn't octuple he couldn't octuple we couldn't octuple you couldn't octuple they couldn't octuple	I couldn't be octupling you couldn't be octupling he couldn't be octupling we couldn't be octupling you couldn't be octupling they couldn't be octupling
Perfect	V-ing perfect
I couldn't have octupled you couldn't have octupled he couldn't have octupled we couldn't have octupled you couldn't have octupled they couldn't have octupled	I couldn't have been octupling you couldn't have been octupling he couldn't have been octupling we couldn't have been octupling you couldn't have been octupling they couldn't have been octupling

Interrogative form

Simple form	V-ing form
could I octuple? could you octuple? could he octuple? could we octuple? could you octuple? could they octuple?	could I be octupling? could you be octupling? could he be octupling? could we be octupling? could you be octupling? could they be octupling?
Perfect	V-ing perfect
could I have octupled? could you have octupled? could he have octupled? could we have octupled? could you have octupled? could they have octupled?	could I have been octupling? could you have been octupling? could he have been octupling? could we have been octupling? could you have been octupling? could they have been octupling?

Interro-negative form

Simple form	V-ing form
couldn't I octuple? couldn't you octuple? couldn't he octuple? couldn't we octuple? couldn't you octuple? couldn't they octuple?	couldn't I be octupling? couldn't you be octupling? couldn't he be octupling? couldn't we be octupling? couldn't you be octupling? couldn't they be octupling?
Perfect	V-ing perfect
couldn't I have octupled? couldn't you have octupled? couldn't he have octupled? couldn't we have octupled? couldn't you have octupled? couldn't they have octupled?	couldn't I have been octupling? couldn't you have been octupling? couldn't he have been octupling? couldn't we have been octupling? couldn't you have been octupling? couldn't they have been octupling?