English verb conjugation
COULD SWISH

Regular verb: swish - swished - swished

Affirmation

Simple form	V-ing form
I could swish you could swish he could swish we could swish you could swish they could swish	I could be swishing you could be swishing he could be swishing we could be swishing you could be swishing they could be swishing
Perfect	V-ing perfect
I could have swished you could have swished he could have swished we could have swished you could have swished they could have swished	I could have been swishing you could have been swishing he could have been swishing we could have been swishing you could have been swishing they could have been swishing

Negation

Simple form	V-ing form
I could not swish you could not swish he could not swish we could not swish you could not swish they could not swish	I could not be swishing you could not be swishing he could not be swishing we could not be swishing you could not be swishing they could not be swishing
Perfect	V-ing perfect
I could not have swished you could not have swished he could not have swished we could not have swished you could not have swished they could not have swished	I could not have been swishing you could not have been swishing he could not have been swishing we could not have been swishing you could not have been swishing they could not have been swishing

Interrogative form

Simple form	V-ing form
could I swish? could you swish? could he swish? could we swish? could you swish? could they swish?	could I be swishing? could you be swishing? could he be swishing? could we be swishing? could you be swishing? could they be swishing?
Perfect	V-ing perfect
could I have swished? could you have swished? could he have swished? could we have swished? could you have swished? could they have swished?	could I have been swishing? could you have been swishing? could he have been swishing? could we have been swishing? could you have been swishing? could they have been swishing?

Interro-negative form

Simple form	V-ing form
could I not swish? could you not swish? could he not swish? could we not swish? could you not swish? could they not swish?	could I not be swishing? could you not be swishing? could he not be swishing? could we not be swishing? could you not be swishing? could they not be swishing?
Perfect	V-ing perfect
could I not have swished? could you not have swished? could he not have swished? could we not have swished? could you not have swished? could they not have swished?	could I not have been swishing? could you not have been swishing? could he not have been swishing? could we not have been swishing? could you not have been swishing? could they not have been swishing?