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 couldn't sass you couldn't sass he couldn't sass we couldn't sass you couldn't sass they couldn't sass	I couldn't be sassing you couldn't be sassing he couldn't be sassing we couldn't be sassing you couldn't be sassing they couldn't be sassing
Perfect	V-ing perfect
I couldn't have sassed you couldn't have sassed he couldn't have sassed we couldn't have sassed you couldn't have sassed they couldn't have sassed	I couldn't have been sassing you couldn't have been sassing he couldn't have been sassing we couldn't have been sassing you couldn't have been sassing they couldn't 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
couldn't I sass? couldn't you sass? couldn't he sass? couldn't we sass? couldn't you sass? couldn't they sass?	couldn't I be sassing? couldn't you be sassing? couldn't he be sassing? couldn't we be sassing? couldn't you be sassing? couldn't they be sassing?
Perfect	V-ing perfect
couldn't I have sassed? couldn't you have sassed? couldn't he have sassed? couldn't we have sassed? couldn't you have sassed? couldn't they have sassed?	couldn't I have been sassing? couldn't you have been sassing? couldn't he have been sassing? couldn't we have been sassing? couldn't you have been sassing? couldn't they have been sassing?