English verb conjugation
COULD SASS

Regular verb: sass - sassed - sassed

Affirmation

Simple form	V-ing form
I could sass you could sass she could sass we could sass you could sass they could sass	I could be sassing you could be sassing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she sass? could we sass? could you sass? could they sass?	could I be sassing? could you be sassing? could she 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 she 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 she 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 she 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 she 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 she 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 she not have been sassing? could we not have been sassing? could you not have been sassing? could they not have been sassing?