must undercount
Regular verb: undercount - undercounted- undercounted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must undercount
you must undercount
she must undercount
we must undercount
you must undercount
they must undercount 	I must be undercounting
you must be undercounting
she must be undercounting
we must be undercounting
you must be undercounting
they must be undercounting	I must have undercounted
you must have undercounted
she 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
she 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 	Perfect 	V-ing perfect 	
I must not undercount
you must not undercount
she 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
she must not be undercounting
we must not be undercounting
you must not be undercounting
they must not be undercounting	I must not have undercounted
you must not have undercounted
she 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
she 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 	Perfect 	V-ing perfect 	
must I undercount?
must you undercount?
must she undercount?
must we undercount?
must you undercount?
must they undercount? 	must I be undercounting?
must you be undercounting?
must she be undercounting?
must we be undercounting?
must you be undercounting?
must they be undercounting? 	must I have undercounted?
must you have undercounted?
must she 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 she 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 	Perfect 	V-ing perfect 	
must I not undercount?
must you not undercount?
must she 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 she not be undercounting?
must we not be undercounting?
must you not be undercounting?
must they not be undercounting? 	must I not have undercounted?
must you not have undercounted?
must she 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 she not have been undercounting?
must we not have been undercounting?
must you not have been undercounting?
must they not have been undercounting?