English verb conjugation
COULD SASS

Regular verb: sass - sassed - sassed

Affirmation

Simple form	V-ing form
I could sass you could sass he could sass we could sass you could sass they could sass	I could be sassing you could be sassing he could be sassing we could be sassing you could be sassing they could be sassing
Perfect	V-ing perfect
I could have sassed you could have sassed he could have sassed we could have sassed you could have sassed they could have sassed	I could have been sassing you could have been sassing he could have been sassing we could have been sassing you could have been sassing they could have been sassing

Negation

Simple form	V-ing form
I could not sass you could not sass he could not sass we could not sass you could not sass they could not sass	I could not be sassing you could not be sassing he could not be sassing we could not be sassing you could not be sassing they could not be sassing
Perfect	V-ing perfect
I could not have sassed you could not have sassed he could not have sassed we could not have sassed you could not have sassed they could not have sassed	I could not have been sassing you could not have been sassing he could not have been sassing we could not have been sassing you could not have been sassing they could not have been sassing

Interrogative form

Simple form	V-ing form
could I sass? could you sass? could he sass? could we sass? could you sass? could they sass?	could I be sassing? could you be sassing? could he be sassing? could we be sassing? could you be sassing? could they be sassing?
Perfect	V-ing perfect
could I have sassed? could you have sassed? could he have sassed? could we have sassed? could you have sassed? could they have sassed?	could I have been sassing? could you have been sassing? could he have been sassing? could we have been sassing? could you have been sassing? could they have been sassing?

Interro-negative form

Simple form	V-ing form
could I not sass? could you not sass? could he not sass? could we not sass? could you not sass? could they not sass?	could I not be sassing? could you not be sassing? could he not be sassing? could we not be sassing? could you not be sassing? could they not be sassing?
Perfect	V-ing perfect
could I not have sassed? could you not have sassed? could he not have sassed? could we not have sassed? could you not have sassed? could they not have sassed?	could I not have been sassing? could you not have been sassing? could he not have been sassing? could we not have been sassing? could you not have been sassing? could they not have been sassing?