English verb conjugation
MUST PRECERTIFY

Regular verb: precertify - precertified - precertified

Affirmation

Simple form	V-ing form
I must precertify you must precertify he must precertify we must precertify you must precertify they must precertify	I must be precertifying you must be precertifying he 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 he 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 he 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 mustn't precertify you mustn't precertify he mustn't precertify we mustn't precertify you mustn't precertify they mustn't precertify	I mustn't be precertifying you mustn't be precertifying he mustn't be precertifying we mustn't be precertifying you mustn't be precertifying they mustn't be precertifying
Perfect	V-ing perfect
I mustn't have precertified you mustn't have precertified he mustn't have precertified we mustn't have precertified you mustn't have precertified they mustn't have precertified	I mustn't have been precertifying you mustn't have been precertifying he mustn't have been precertifying we mustn't have been precertifying you mustn't have been precertifying they mustn't have been precertifying

Interrogative form

Simple form	V-ing form
must I precertify? must you precertify? must he precertify? must we precertify? must you precertify? must they precertify?	must I be precertifying? must you be precertifying? must he 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 he 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 he 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
mustn't I precertify? mustn't you precertify? mustn't he precertify? mustn't we precertify? mustn't you precertify? mustn't they precertify?	mustn't I be precertifying? mustn't you be precertifying? mustn't he be precertifying? mustn't we be precertifying? mustn't you be precertifying? mustn't they be precertifying?
Perfect	V-ing perfect
mustn't I have precertified? mustn't you have precertified? mustn't he have precertified? mustn't we have precertified? mustn't you have precertified? mustn't they have precertified?	mustn't I have been precertifying? mustn't you have been precertifying? mustn't he have been precertifying? mustn't we have been precertifying? mustn't you have been precertifying? mustn't they have been precertifying?