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 mustn't underfurnish you mustn't underfurnish he mustn't underfurnish we mustn't underfurnish you mustn't underfurnish they mustn't underfurnish	I mustn't be underfurnishing you mustn't be underfurnishing he mustn't be underfurnishing we mustn't be underfurnishing you mustn't be underfurnishing they mustn't be underfurnishing
Perfect	V-ing perfect
I mustn't have underfurnished you mustn't have underfurnished he mustn't have underfurnished we mustn't have underfurnished you mustn't have underfurnished they mustn't have underfurnished	I mustn't have been underfurnishing you mustn't have been underfurnishing he mustn't have been underfurnishing we mustn't have been underfurnishing you mustn't have been underfurnishing they mustn't 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
mustn't I underfurnish? mustn't you underfurnish? mustn't he underfurnish? mustn't we underfurnish? mustn't you underfurnish? mustn't they underfurnish?	mustn't I be underfurnishing? mustn't you be underfurnishing? mustn't he be underfurnishing? mustn't we be underfurnishing? mustn't you be underfurnishing? mustn't they be underfurnishing?
Perfect	V-ing perfect
mustn't I have underfurnished? mustn't you have underfurnished? mustn't he have underfurnished? mustn't we have underfurnished? mustn't you have underfurnished? mustn't they have underfurnished?	mustn't I have been underfurnishing? mustn't you have been underfurnishing? mustn't he have been underfurnishing? mustn't we have been underfurnishing? mustn't you have been underfurnishing? mustn't they have been underfurnishing?