must precertify
Verbo regular: precertify - precertified- precertified

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not precertify
you must not precertify
he 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
he must not be precertifying
we must not be precertifying
you must not be precertifying
they must not be precertifying	I must not have precertified
you must not have precertified
he 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
he must not have been precertifying
we must not have been precertifying
you must not have been precertifying
they must not have been precertifying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not precertify?
must you not precertify?
must he 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 he not be precertifying?
must we not be precertifying?
must you not be precertifying?
must they not be precertifying? 	must I not have precertified?
must you not have precertified?
must he 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 he not have been precertifying?
must we not have been precertifying?
must you not have been precertifying?
must they not have been precertifying?