English verb conjugation
COULD UNDERFURNISH

Regular verb: underfurnish - underfurnished - underfurnished

Affirmation

Simple form	V-ing form
I could underfurnish you could underfurnish she could underfurnish we could underfurnish you could underfurnish they could underfurnish	I could be underfurnishing you could be underfurnishing she could be underfurnishing we could be underfurnishing you could be underfurnishing they could be underfurnishing
Perfect	V-ing perfect
I could have underfurnished you could have underfurnished she could have underfurnished we could have underfurnished you could have underfurnished they could have underfurnished	I could have been underfurnishing you could have been underfurnishing she could have been underfurnishing we could have been underfurnishing you could have been underfurnishing they could have been underfurnishing

Negation

Simple form	V-ing form
I could not underfurnish you could not underfurnish she could not underfurnish we could not underfurnish you could not underfurnish they could not underfurnish	I could not be underfurnishing you could not be underfurnishing she could not be underfurnishing we could not be underfurnishing you could not be underfurnishing they could not be underfurnishing
Perfect	V-ing perfect
I could not have underfurnished you could not have underfurnished she could not have underfurnished we could not have underfurnished you could not have underfurnished they could not have underfurnished	I could not have been underfurnishing you could not have been underfurnishing she could not have been underfurnishing we could not have been underfurnishing you could not have been underfurnishing they could not have been underfurnishing

Interrogative form

Simple form	V-ing form
could I underfurnish? could you underfurnish? could she underfurnish? could we underfurnish? could you underfurnish? could they underfurnish?	could I be underfurnishing? could you be underfurnishing? could she be underfurnishing? could we be underfurnishing? could you be underfurnishing? could they be underfurnishing?
Perfect	V-ing perfect
could I have underfurnished? could you have underfurnished? could she have underfurnished? could we have underfurnished? could you have underfurnished? could they have underfurnished?	could I have been underfurnishing? could you have been underfurnishing? could she have been underfurnishing? could we have been underfurnishing? could you have been underfurnishing? could they have been underfurnishing?

Interro-negative form

Simple form	V-ing form
could I not underfurnish? could you not underfurnish? could she not underfurnish? could we not underfurnish? could you not underfurnish? could they not underfurnish?	could I not be underfurnishing? could you not be underfurnishing? could she not be underfurnishing? could we not be underfurnishing? could you not be underfurnishing? could they not be underfurnishing?
Perfect	V-ing perfect
could I not have underfurnished? could you not have underfurnished? could she not have underfurnished? could we not have underfurnished? could you not have underfurnished? could they not have underfurnished?	could I not have been underfurnishing? could you not have been underfurnishing? could she not have been underfurnishing? could we not have been underfurnishing? could you not have been underfurnishing? could they not have been underfurnishing?