English verb conjugation
MUST UNDERFURNISH

Regular verb: underfurnish - underfurnished - underfurnished

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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