English verb conjugation
COULD SCUMBLE

Regular verb: scumble - scumbled - scumbled

Affirmation

Simple form	V-ing form
I could scumble you could scumble he could scumble we could scumble you could scumble they could scumble	I could be scumbling you could be scumbling he could be scumbling we could be scumbling you could be scumbling they could be scumbling
Perfect	V-ing perfect
I could have scumbled you could have scumbled he could have scumbled we could have scumbled you could have scumbled they could have scumbled	I could have been scumbling you could have been scumbling he could have been scumbling we could have been scumbling you could have been scumbling they could have been scumbling

Negation

Simple form	V-ing form
I could not scumble you could not scumble he could not scumble we could not scumble you could not scumble they could not scumble	I could not be scumbling you could not be scumbling he could not be scumbling we could not be scumbling you could not be scumbling they could not be scumbling
Perfect	V-ing perfect
I could not have scumbled you could not have scumbled he could not have scumbled we could not have scumbled you could not have scumbled they could not have scumbled	I could not have been scumbling you could not have been scumbling he could not have been scumbling we could not have been scumbling you could not have been scumbling they could not have been scumbling

Interrogative form

Simple form	V-ing form
could I scumble? could you scumble? could he scumble? could we scumble? could you scumble? could they scumble?	could I be scumbling? could you be scumbling? could he be scumbling? could we be scumbling? could you be scumbling? could they be scumbling?
Perfect	V-ing perfect
could I have scumbled? could you have scumbled? could he have scumbled? could we have scumbled? could you have scumbled? could they have scumbled?	could I have been scumbling? could you have been scumbling? could he have been scumbling? could we have been scumbling? could you have been scumbling? could they have been scumbling?

Interro-negative form

Simple form	V-ing form
could I not scumble? could you not scumble? could he not scumble? could we not scumble? could you not scumble? could they not scumble?	could I not be scumbling? could you not be scumbling? could he not be scumbling? could we not be scumbling? could you not be scumbling? could they not be scumbling?
Perfect	V-ing perfect
could I not have scumbled? could you not have scumbled? could he not have scumbled? could we not have scumbled? could you not have scumbled? could they not have scumbled?	could I not have been scumbling? could you not have been scumbling? could he not have been scumbling? could we not have been scumbling? could you not have been scumbling? could they not have been scumbling?