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 must not undercount you must not undercount he must not undercount we must not undercount you must not undercount they must not undercount	I must not be undercounting you must not be undercounting he must not be undercounting we must not be undercounting you must not be undercounting they must not be undercounting
Perfect	V-ing perfect
I must not have undercounted you must not have undercounted he must not have undercounted we must not have undercounted you must not have undercounted they must not have undercounted	I must not have been undercounting you must not have been undercounting he must not have been undercounting we must not have been undercounting you must not have been undercounting they must not 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
must I not undercount? must you not undercount? must he not undercount? must we not undercount? must you not undercount? must they not undercount?	must I not be undercounting? must you not be undercounting? must he not be undercounting? must we not be undercounting? must you not be undercounting? must they not be undercounting?
Perfect	V-ing perfect
must I not have undercounted? must you not have undercounted? must he not have undercounted? must we not have undercounted? must you not have undercounted? must they not have undercounted?	must I not have been undercounting? must you not have been undercounting? must he not have been undercounting? must we not have been undercounting? must you not have been undercounting? must they not have been undercounting?