must preapprove
Regular verb: preapprove - preapproved- preapproved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must preapprove
you must preapprove
she must preapprove
we must preapprove
you must preapprove
they must preapprove 	I must be preapproving
you must be preapproving
she must be preapproving
we must be preapproving
you must be preapproving
they must be preapproving	I must have preapproved
you must have preapproved
she must have preapproved
we must have preapproved
you must have preapproved
they must have preapproved	I must have been preapproving
you must have been preapproving
she must have been preapproving
we must have been preapproving
you must have been preapproving
they must have been preapproving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't preapprove
you mustn't preapprove
she mustn't preapprove
we mustn't preapprove
you mustn't preapprove
they mustn't preapprove 	I mustn't be preapproving
you mustn't be preapproving
she mustn't be preapproving
we mustn't be preapproving
you mustn't be preapproving
they mustn't be preapproving	I mustn't have preapproved
you mustn't have preapproved
she mustn't have preapproved
we mustn't have preapproved
you mustn't have preapproved
they mustn't have preapproved	I mustn't have been preapproving
you mustn't have been preapproving
she mustn't have been preapproving
we mustn't have been preapproving
you mustn't have been preapproving
they mustn't have been preapproving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I preapprove?
must you preapprove?
must she preapprove?
must we preapprove?
must you preapprove?
must they preapprove? 	must I be preapproving?
must you be preapproving?
must she be preapproving?
must we be preapproving?
must you be preapproving?
must they be preapproving? 	must I have preapproved?
must you have preapproved?
must she have preapproved?
must we have preapproved?
must you have preapproved?
must they have preapproved? 	must I have been preapproving?
must you have been preapproving?
must she have been preapproving?
must we have been preapproving?
must you have been preapproving?
must they have been preapproving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I preapprove?
mustn't you preapprove?
mustn't she preapprove?
mustn't we preapprove?
mustn't you preapprove?
mustn't they preapprove? 	mustn't I be preapproving?
mustn't you be preapproving?
mustn't she be preapproving?
mustn't we be preapproving?
mustn't you be preapproving?
mustn't they be preapproving? 	mustn't I have preapproved?
mustn't you have preapproved?
mustn't she have preapproved?
mustn't we have preapproved?
mustn't you have preapproved?
mustn't they have preapproved? 	mustn't I have been preapproving?
mustn't you have been preapproving?
mustn't she have been preapproving?
mustn't we have been preapproving?
mustn't you have been preapproving?
mustn't they have been preapproving?