English verb conjugation
MUST UNDERCOUNT

Regular verb: undercount - undercounted - undercounted

Affirmation

Simple form	V-ing form
I must undercount you must undercount he must undercount we must undercount you must undercount they must undercount	I must be undercounting you must be undercounting he must be undercounting we must be undercounting you must be undercounting they must be undercounting
Perfect	V-ing perfect
I must have undercounted you must have undercounted he must have undercounted we must have undercounted you must have undercounted they must have undercounted	I must have been undercounting you must have been undercounting he must have been undercounting we must have been undercounting you must have been undercounting they must have been undercounting

Negation

Simple form	V-ing form
I mustn't undercount you mustn't undercount he mustn't undercount we mustn't undercount you mustn't undercount they mustn't undercount	I mustn't be undercounting you mustn't be undercounting he mustn't be undercounting we mustn't be undercounting you mustn't be undercounting they mustn't be undercounting
Perfect	V-ing perfect
I mustn't have undercounted you mustn't have undercounted he mustn't have undercounted we mustn't have undercounted you mustn't have undercounted they mustn't have undercounted	I mustn't have been undercounting you mustn't have been undercounting he mustn't have been undercounting we mustn't have been undercounting you mustn't have been undercounting they mustn't have been undercounting

Interrogative form

Simple form	V-ing form
must I undercount? must you undercount? must he undercount? must we undercount? must you undercount? must they undercount?	must I be undercounting? must you be undercounting? must he be undercounting? must we be undercounting? must you be undercounting? must they be undercounting?
Perfect	V-ing perfect
must I have undercounted? must you have undercounted? must he have undercounted? must we have undercounted? must you have undercounted? must they have undercounted?	must I have been undercounting? must you have been undercounting? must he have been undercounting? must we have been undercounting? must you have been undercounting? must they have been undercounting?

Interro-negative form

Simple form	V-ing form
mustn't I undercount? mustn't you undercount? mustn't he undercount? mustn't we undercount? mustn't you undercount? mustn't they undercount?	mustn't I be undercounting? mustn't you be undercounting? mustn't he be undercounting? mustn't we be undercounting? mustn't you be undercounting? mustn't they be undercounting?
Perfect	V-ing perfect
mustn't I have undercounted? mustn't you have undercounted? mustn't he have undercounted? mustn't we have undercounted? mustn't you have undercounted? mustn't they have undercounted?	mustn't I have been undercounting? mustn't you have been undercounting? mustn't he have been undercounting? mustn't we have been undercounting? mustn't you have been undercounting? mustn't they have been undercounting?