English verb conjugation
COULD GASH

Regular verb: gash - gashed - gashed

Affirmation

Simple form	V-ing form
I could gash you could gash she could gash we could gash you could gash they could gash	I could be gashing you could be gashing she 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 she 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 she 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 couldn't gash you couldn't gash she couldn't gash we couldn't gash you couldn't gash they couldn't gash	I couldn't be gashing you couldn't be gashing she couldn't be gashing we couldn't be gashing you couldn't be gashing they couldn't be gashing
Perfect	V-ing perfect
I couldn't have gashed you couldn't have gashed she couldn't have gashed we couldn't have gashed you couldn't have gashed they couldn't have gashed	I couldn't have been gashing you couldn't have been gashing she couldn't have been gashing we couldn't have been gashing you couldn't have been gashing they couldn't have been gashing

Interrogative form

Simple form	V-ing form
could I gash? could you gash? could she gash? could we gash? could you gash? could they gash?	could I be gashing? could you be gashing? could she 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 she 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 she 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
couldn't I gash? couldn't you gash? couldn't she gash? couldn't we gash? couldn't you gash? couldn't they gash?	couldn't I be gashing? couldn't you be gashing? couldn't she be gashing? couldn't we be gashing? couldn't you be gashing? couldn't they be gashing?
Perfect	V-ing perfect
couldn't I have gashed? couldn't you have gashed? couldn't she have gashed? couldn't we have gashed? couldn't you have gashed? couldn't they have gashed?	couldn't I have been gashing? couldn't you have been gashing? couldn't she have been gashing? couldn't we have been gashing? couldn't you have been gashing? couldn't they have been gashing?