can precertify
Verbo regular: precertify - precertified- precertified

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can precertify
you can precertify
she can precertify
we can precertify
you can precertify
they can precertify 	I can be precertifying
you can be precertifying
she can be precertifying
we can be precertifying
you can be precertifying
they can be precertifying	I can have precertified
you can have precertified
she can have precertified
we can have precertified
you can have precertified
they can have precertified	I can have been precertifying
you can have been precertifying
she can have been precertifying
we can have been precertifying
you can have been precertifying
they can have been precertifying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot precertify
you cannot precertify
she cannot precertify
we cannot precertify
you cannot precertify
they cannot precertify 	I cannot be precertifying
you cannot be precertifying
she cannot be precertifying
we cannot be precertifying
you cannot be precertifying
they cannot be precertifying	I cannot have precertified
you cannot have precertified
she cannot have precertified
we cannot have precertified
you cannot have precertified
they cannot have precertified	I cannot have been precertifying
you cannot have been precertifying
she cannot have been precertifying
we cannot have been precertifying
you cannot have been precertifying
they cannot have been precertifying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I precertify?
can you precertify?
can she precertify?
can we precertify?
can you precertify?
can they precertify? 	can I be precertifying?
can you be precertifying?
can she be precertifying?
can we be precertifying?
can you be precertifying?
can they be precertifying? 	can I have precertified?
can you have precertified?
can she have precertified?
can we have precertified?
can you have precertified?
can they have precertified? 	can I have been precertifying?
can you have been precertifying?
can she have been precertifying?
can we have been precertifying?
can you have been precertifying?
can they have been precertifying? 	

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