English verb conjugation
COULD SASH

Regular verb: sash - sashed - sashed

Affirmation

Simple form	V-ing form
I could sash you could sash he could sash we could sash you could sash they could sash	I could be sashing you could be sashing he could be sashing we could be sashing you could be sashing they could be sashing
Perfect	V-ing perfect
I could have sashed you could have sashed he could have sashed we could have sashed you could have sashed they could have sashed	I could have been sashing you could have been sashing he could have been sashing we could have been sashing you could have been sashing they could have been sashing

Negation

Simple form	V-ing form
I could not sash you could not sash he could not sash we could not sash you could not sash they could not sash	I could not be sashing you could not be sashing he could not be sashing we could not be sashing you could not be sashing they could not be sashing
Perfect	V-ing perfect
I could not have sashed you could not have sashed he could not have sashed we could not have sashed you could not have sashed they could not have sashed	I could not have been sashing you could not have been sashing he could not have been sashing we could not have been sashing you could not have been sashing they could not have been sashing

Interrogative form

Simple form	V-ing form
could I sash? could you sash? could he sash? could we sash? could you sash? could they sash?	could I be sashing? could you be sashing? could he be sashing? could we be sashing? could you be sashing? could they be sashing?
Perfect	V-ing perfect
could I have sashed? could you have sashed? could he have sashed? could we have sashed? could you have sashed? could they have sashed?	could I have been sashing? could you have been sashing? could he have been sashing? could we have been sashing? could you have been sashing? could they have been sashing?

Interro-negative form

Simple form	V-ing form
could I not sash? could you not sash? could he not sash? could we not sash? could you not sash? could they not sash?	could I not be sashing? could you not be sashing? could he not be sashing? could we not be sashing? could you not be sashing? could they not be sashing?
Perfect	V-ing perfect
could I not have sashed? could you not have sashed? could he not have sashed? could we not have sashed? could you not have sashed? could they not have sashed?	could I not have been sashing? could you not have been sashing? could he not have been sashing? could we not have been sashing? could you not have been sashing? could they not have been sashing?