English verb conjugation
MUST PRECERTIFY

Regular verb: precertify - precertified - precertified

Affirmation

Simple form	V-ing form
I must precertify you must precertify she must precertify we must precertify you must precertify they must precertify	I must be precertifying you must be precertifying she must be precertifying we must be precertifying you must be precertifying they must be precertifying
Perfect	V-ing perfect
I must have precertified you must have precertified she must have precertified we must have precertified you must have precertified they must have precertified	I must have been precertifying you must have been precertifying she must have been precertifying we must have been precertifying you must have been precertifying they must have been precertifying

Negation

Simple form	V-ing form
I must not precertify you must not precertify she must not precertify we must not precertify you must not precertify they must not precertify	I must not be precertifying you must not be precertifying she must not be precertifying we must not be precertifying you must not be precertifying they must not be precertifying
Perfect	V-ing perfect
I must not have precertified you must not have precertified she must not have precertified we must not have precertified you must not have precertified they must not have precertified	I must not have been precertifying you must not have been precertifying she must not have been precertifying we must not have been precertifying you must not have been precertifying they must not have been precertifying

Interrogative form

Simple form	V-ing form
must I precertify? must you precertify? must she precertify? must we precertify? must you precertify? must they precertify?	must I be precertifying? must you be precertifying? must she be precertifying? must we be precertifying? must you be precertifying? must they be precertifying?
Perfect	V-ing perfect
must I have precertified? must you have precertified? must she have precertified? must we have precertified? must you have precertified? must they have precertified?	must I have been precertifying? must you have been precertifying? must she have been precertifying? must we have been precertifying? must you have been precertifying? must they have been precertifying?

Interro-negative form

Simple form	V-ing form
must I not precertify? must you not precertify? must she not precertify? must we not precertify? must you not precertify? must they not precertify?	must I not be precertifying? must you not be precertifying? must she not be precertifying? must we not be precertifying? must you not be precertifying? must they not be precertifying?
Perfect	V-ing perfect
must I not have precertified? must you not have precertified? must she not have precertified? must we not have precertified? must you not have precertified? must they not have precertified?	must I not have been precertifying? must you not have been precertifying? must she not have been precertifying? must we not have been precertifying? must you not have been precertifying? must they not have been precertifying?