English verb conjugation
COULD JUMBLE

Regular verb: jumble - jumbled - jumbled

Affirmation

Simple form	V-ing form
I could jumble you could jumble he could jumble we could jumble you could jumble they could jumble	I could be jumbling you could be jumbling he could be jumbling we could be jumbling you could be jumbling they could be jumbling
Perfect	V-ing perfect
I could have jumbled you could have jumbled he could have jumbled we could have jumbled you could have jumbled they could have jumbled	I could have been jumbling you could have been jumbling he could have been jumbling we could have been jumbling you could have been jumbling they could have been jumbling

Negation

Simple form	V-ing form
I could not jumble you could not jumble he could not jumble we could not jumble you could not jumble they could not jumble	I could not be jumbling you could not be jumbling he could not be jumbling we could not be jumbling you could not be jumbling they could not be jumbling
Perfect	V-ing perfect
I could not have jumbled you could not have jumbled he could not have jumbled we could not have jumbled you could not have jumbled they could not have jumbled	I could not have been jumbling you could not have been jumbling he could not have been jumbling we could not have been jumbling you could not have been jumbling they could not have been jumbling

Interrogative form

Simple form	V-ing form
could I jumble? could you jumble? could he jumble? could we jumble? could you jumble? could they jumble?	could I be jumbling? could you be jumbling? could he be jumbling? could we be jumbling? could you be jumbling? could they be jumbling?
Perfect	V-ing perfect
could I have jumbled? could you have jumbled? could he have jumbled? could we have jumbled? could you have jumbled? could they have jumbled?	could I have been jumbling? could you have been jumbling? could he have been jumbling? could we have been jumbling? could you have been jumbling? could they have been jumbling?

Interro-negative form

Simple form	V-ing form
could I not jumble? could you not jumble? could he not jumble? could we not jumble? could you not jumble? could they not jumble?	could I not be jumbling? could you not be jumbling? could he not be jumbling? could we not be jumbling? could you not be jumbling? could they not be jumbling?
Perfect	V-ing perfect
could I not have jumbled? could you not have jumbled? could he not have jumbled? could we not have jumbled? could you not have jumbled? could they not have jumbled?	could I not have been jumbling? could you not have been jumbling? could he not have been jumbling? could we not have been jumbling? could you not have been jumbling? could they not have been jumbling?