English verb conjugation
COULD DECOUPLE

Regular verb: decouple - decoupled - decoupled

Affirmation

Simple form	V-ing form
I could decouple you could decouple he could decouple we could decouple you could decouple they could decouple	I could be decoupling you could be decoupling he could be decoupling we could be decoupling you could be decoupling they could be decoupling
Perfect	V-ing perfect
I could have decoupled you could have decoupled he could have decoupled we could have decoupled you could have decoupled they could have decoupled	I could have been decoupling you could have been decoupling he could have been decoupling we could have been decoupling you could have been decoupling they could have been decoupling

Negation

Simple form	V-ing form
I couldn't decouple you couldn't decouple he couldn't decouple we couldn't decouple you couldn't decouple they couldn't decouple	I couldn't be decoupling you couldn't be decoupling he couldn't be decoupling we couldn't be decoupling you couldn't be decoupling they couldn't be decoupling
Perfect	V-ing perfect
I couldn't have decoupled you couldn't have decoupled he couldn't have decoupled we couldn't have decoupled you couldn't have decoupled they couldn't have decoupled	I couldn't have been decoupling you couldn't have been decoupling he couldn't have been decoupling we couldn't have been decoupling you couldn't have been decoupling they couldn't have been decoupling

Interrogative form

Simple form	V-ing form
could I decouple? could you decouple? could he decouple? could we decouple? could you decouple? could they decouple?	could I be decoupling? could you be decoupling? could he be decoupling? could we be decoupling? could you be decoupling? could they be decoupling?
Perfect	V-ing perfect
could I have decoupled? could you have decoupled? could he have decoupled? could we have decoupled? could you have decoupled? could they have decoupled?	could I have been decoupling? could you have been decoupling? could he have been decoupling? could we have been decoupling? could you have been decoupling? could they have been decoupling?

Interro-negative form

Simple form	V-ing form
couldn't I decouple? couldn't you decouple? couldn't he decouple? couldn't we decouple? couldn't you decouple? couldn't they decouple?	couldn't I be decoupling? couldn't you be decoupling? couldn't he be decoupling? couldn't we be decoupling? couldn't you be decoupling? couldn't they be decoupling?
Perfect	V-ing perfect
couldn't I have decoupled? couldn't you have decoupled? couldn't he have decoupled? couldn't we have decoupled? couldn't you have decoupled? couldn't they have decoupled?	couldn't I have been decoupling? couldn't you have been decoupling? couldn't he have been decoupling? couldn't we have been decoupling? couldn't you have been decoupling? couldn't they have been decoupling?