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 couldn't sash you couldn't sash he couldn't sash we couldn't sash you couldn't sash they couldn't sash	I couldn't be sashing you couldn't be sashing he couldn't be sashing we couldn't be sashing you couldn't be sashing they couldn't be sashing
Perfect	V-ing perfect
I couldn't have sashed you couldn't have sashed he couldn't have sashed we couldn't have sashed you couldn't have sashed they couldn't have sashed	I couldn't have been sashing you couldn't have been sashing he couldn't have been sashing we couldn't have been sashing you couldn't have been sashing they couldn't 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
couldn't I sash? couldn't you sash? couldn't he sash? couldn't we sash? couldn't you sash? couldn't they sash?	couldn't I be sashing? couldn't you be sashing? couldn't he be sashing? couldn't we be sashing? couldn't you be sashing? couldn't they be sashing?
Perfect	V-ing perfect
couldn't I have sashed? couldn't you have sashed? couldn't he have sashed? couldn't we have sashed? couldn't you have sashed? couldn't they have sashed?	couldn't I have been sashing? couldn't you have been sashing? couldn't he have been sashing? couldn't we have been sashing? couldn't you have been sashing? couldn't they have been sashing?