English verb conjugation
COULD BURNISH

Regular verb: burnish - burnished - burnished

Affirmation

Simple form	V-ing form
I could burnish you could burnish she could burnish we could burnish you could burnish they could burnish	I could be burnishing you could be burnishing she could be burnishing we could be burnishing you could be burnishing they could be burnishing
Perfect	V-ing perfect
I could have burnished you could have burnished she could have burnished we could have burnished you could have burnished they could have burnished	I could have been burnishing you could have been burnishing she could have been burnishing we could have been burnishing you could have been burnishing they could have been burnishing

Negation

Simple form	V-ing form
I couldn't burnish you couldn't burnish she couldn't burnish we couldn't burnish you couldn't burnish they couldn't burnish	I couldn't be burnishing you couldn't be burnishing she couldn't be burnishing we couldn't be burnishing you couldn't be burnishing they couldn't be burnishing
Perfect	V-ing perfect
I couldn't have burnished you couldn't have burnished she couldn't have burnished we couldn't have burnished you couldn't have burnished they couldn't have burnished	I couldn't have been burnishing you couldn't have been burnishing she couldn't have been burnishing we couldn't have been burnishing you couldn't have been burnishing they couldn't have been burnishing

Interrogative form

Simple form	V-ing form
could I burnish? could you burnish? could she burnish? could we burnish? could you burnish? could they burnish?	could I be burnishing? could you be burnishing? could she be burnishing? could we be burnishing? could you be burnishing? could they be burnishing?
Perfect	V-ing perfect
could I have burnished? could you have burnished? could she have burnished? could we have burnished? could you have burnished? could they have burnished?	could I have been burnishing? could you have been burnishing? could she have been burnishing? could we have been burnishing? could you have been burnishing? could they have been burnishing?

Interro-negative form

Simple form	V-ing form
couldn't I burnish? couldn't you burnish? couldn't she burnish? couldn't we burnish? couldn't you burnish? couldn't they burnish?	couldn't I be burnishing? couldn't you be burnishing? couldn't she be burnishing? couldn't we be burnishing? couldn't you be burnishing? couldn't they be burnishing?
Perfect	V-ing perfect
couldn't I have burnished? couldn't you have burnished? couldn't she have burnished? couldn't we have burnished? couldn't you have burnished? couldn't they have burnished?	couldn't I have been burnishing? couldn't you have been burnishing? couldn't she have been burnishing? couldn't we have been burnishing? couldn't you have been burnishing? couldn't they have been burnishing?