must precode
Verbo regular: precode - precoded- precoded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must precode
you must precode
he must precode
we must precode
you must precode
they must precode 	I must be precoding
you must be precoding
he must be precoding
we must be precoding
you must be precoding
they must be precoding	I must have precoded
you must have precoded
he must have precoded
we must have precoded
you must have precoded
they must have precoded	I must have been precoding
you must have been precoding
he must have been precoding
we must have been precoding
you must have been precoding
they must have been precoding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not precode
you must not precode
he must not precode
we must not precode
you must not precode
they must not precode 	I must not be precoding
you must not be precoding
he must not be precoding
we must not be precoding
you must not be precoding
they must not be precoding	I must not have precoded
you must not have precoded
he must not have precoded
we must not have precoded
you must not have precoded
they must not have precoded	I must not have been precoding
you must not have been precoding
he must not have been precoding
we must not have been precoding
you must not have been precoding
they must not have been precoding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I precode?
must you precode?
must he precode?
must we precode?
must you precode?
must they precode? 	must I be precoding?
must you be precoding?
must he be precoding?
must we be precoding?
must you be precoding?
must they be precoding? 	must I have precoded?
must you have precoded?
must he have precoded?
must we have precoded?
must you have precoded?
must they have precoded? 	must I have been precoding?
must you have been precoding?
must he have been precoding?
must we have been precoding?
must you have been precoding?
must they have been precoding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not precode?
must you not precode?
must he not precode?
must we not precode?
must you not precode?
must they not precode? 	must I not be precoding?
must you not be precoding?
must he not be precoding?
must we not be precoding?
must you not be precoding?
must they not be precoding? 	must I not have precoded?
must you not have precoded?
must he not have precoded?
must we not have precoded?
must you not have precoded?
must they not have precoded? 	must I not have been precoding?
must you not have been precoding?
must he not have been precoding?
must we not have been precoding?
must you not have been precoding?
must they not have been precoding?