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 could not blemish you could not blemish he could not blemish we could not blemish you could not blemish they could not blemish	I could not be blemishing you could not be blemishing he could not be blemishing we could not be blemishing you could not be blemishing they could not be blemishing
Perfect	V-ing perfect
I could not have blemished you could not have blemished he could not have blemished we could not have blemished you could not have blemished they could not have blemished	I could not have been blemishing you could not have been blemishing he could not have been blemishing we could not have been blemishing you could not have been blemishing they could not 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
could I not blemish? could you not blemish? could he not blemish? could we not blemish? could you not blemish? could they not blemish?	could I not be blemishing? could you not be blemishing? could he not be blemishing? could we not be blemishing? could you not be blemishing? could they not be blemishing?
Perfect	V-ing perfect
could I not have blemished? could you not have blemished? could he not have blemished? could we not have blemished? could you not have blemished? could they not have blemished?	could I not have been blemishing? could you not have been blemishing? could he not have been blemishing? could we not have been blemishing? could you not have been blemishing? could they not have been blemishing?