English verb conjugation
COULD GASH

Regular verb: gash - gashed - gashed

Affirmation

Simple form	V-ing form
I could gash you could gash he could gash we could gash you could gash they could gash	I could be gashing you could be gashing he could be gashing we could be gashing you could be gashing they could be gashing
Perfect	V-ing perfect
I could have gashed you could have gashed he could have gashed we could have gashed you could have gashed they could have gashed	I could have been gashing you could have been gashing he could have been gashing we could have been gashing you could have been gashing they could have been gashing

Negation

Simple form	V-ing form
I could not gash you could not gash he could not gash we could not gash you could not gash they could not gash	I could not be gashing you could not be gashing he could not be gashing we could not be gashing you could not be gashing they could not be gashing
Perfect	V-ing perfect
I could not have gashed you could not have gashed he could not have gashed we could not have gashed you could not have gashed they could not have gashed	I could not have been gashing you could not have been gashing he could not have been gashing we could not have been gashing you could not have been gashing they could not have been gashing

Interrogative form

Simple form	V-ing form
could I gash? could you gash? could he gash? could we gash? could you gash? could they gash?	could I be gashing? could you be gashing? could he be gashing? could we be gashing? could you be gashing? could they be gashing?
Perfect	V-ing perfect
could I have gashed? could you have gashed? could he have gashed? could we have gashed? could you have gashed? could they have gashed?	could I have been gashing? could you have been gashing? could he have been gashing? could we have been gashing? could you have been gashing? could they have been gashing?

Interro-negative form

Simple form	V-ing form
could I not gash? could you not gash? could he not gash? could we not gash? could you not gash? could they not gash?	could I not be gashing? could you not be gashing? could he not be gashing? could we not be gashing? could you not be gashing? could they not be gashing?
Perfect	V-ing perfect
could I not have gashed? could you not have gashed? could he not have gashed? could we not have gashed? could you not have gashed? could they not have gashed?	could I not have been gashing? could you not have been gashing? could he not have been gashing? could we not have been gashing? could you not have been gashing? could they not have been gashing?