English verb conjugation
COULD BLEMISH

Regular verb: blemish - blemished - blemished

Affirmation

Simple form	V-ing form
I could blemish you could blemish he could blemish we could blemish you could blemish they could blemish	I could be blemishing you could be blemishing he could be blemishing we could be blemishing you could be blemishing they could be blemishing
Perfect	V-ing perfect
I could have blemished you could have blemished he could have blemished we could have blemished you could have blemished they could have blemished	I could have been blemishing you could have been blemishing he could have been blemishing we could have been blemishing you could have been blemishing they could have been blemishing

Negation

Simple form	V-ing form
I couldn't blemish you couldn't blemish he couldn't blemish we couldn't blemish you couldn't blemish they couldn't blemish	I couldn't be blemishing you couldn't be blemishing he couldn't be blemishing we couldn't be blemishing you couldn't be blemishing they couldn't be blemishing
Perfect	V-ing perfect
I couldn't have blemished you couldn't have blemished he couldn't have blemished we couldn't have blemished you couldn't have blemished they couldn't have blemished	I couldn't have been blemishing you couldn't have been blemishing he couldn't have been blemishing we couldn't have been blemishing you couldn't have been blemishing they couldn't have been blemishing

Interrogative form

Simple form	V-ing form
could I blemish? could you blemish? could he blemish? could we blemish? could you blemish? could they blemish?	could I be blemishing? could you be blemishing? could he be blemishing? could we be blemishing? could you be blemishing? could they be blemishing?
Perfect	V-ing perfect
could I have blemished? could you have blemished? could he have blemished? could we have blemished? could you have blemished? could they have blemished?	could I have been blemishing? could you have been blemishing? could he have been blemishing? could we have been blemishing? could you have been blemishing? could they have been blemishing?

Interro-negative form

Simple form	V-ing form
couldn't I blemish? couldn't you blemish? couldn't he blemish? couldn't we blemish? couldn't you blemish? couldn't they blemish?	couldn't I be blemishing? couldn't you be blemishing? couldn't he be blemishing? couldn't we be blemishing? couldn't you be blemishing? couldn't they be blemishing?
Perfect	V-ing perfect
couldn't I have blemished? couldn't you have blemished? couldn't he have blemished? couldn't we have blemished? couldn't you have blemished? couldn't they have blemished?	couldn't I have been blemishing? couldn't you have been blemishing? couldn't he have been blemishing? couldn't we have been blemishing? couldn't you have been blemishing? couldn't they have been blemishing?