must precess
Verbo regular: precess - precessed- precessed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must precess
you must precess
he must precess
we must precess
you must precess
they must precess 	I must be precessing
you must be precessing
he must be precessing
we must be precessing
you must be precessing
they must be precessing	I must have precessed
you must have precessed
he must have precessed
we must have precessed
you must have precessed
they must have precessed	I must have been precessing
you must have been precessing
he must have been precessing
we must have been precessing
you must have been precessing
they must have been precessing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not precess
you must not precess
he must not precess
we must not precess
you must not precess
they must not precess 	I must not be precessing
you must not be precessing
he must not be precessing
we must not be precessing
you must not be precessing
they must not be precessing	I must not have precessed
you must not have precessed
he must not have precessed
we must not have precessed
you must not have precessed
they must not have precessed	I must not have been precessing
you must not have been precessing
he must not have been precessing
we must not have been precessing
you must not have been precessing
they must not have been precessing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I precess?
must you precess?
must he precess?
must we precess?
must you precess?
must they precess? 	must I be precessing?
must you be precessing?
must he be precessing?
must we be precessing?
must you be precessing?
must they be precessing? 	must I have precessed?
must you have precessed?
must he have precessed?
must we have precessed?
must you have precessed?
must they have precessed? 	must I have been precessing?
must you have been precessing?
must he have been precessing?
must we have been precessing?
must you have been precessing?
must they have been precessing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not precess?
must you not precess?
must he not precess?
must we not precess?
must you not precess?
must they not precess? 	must I not be precessing?
must you not be precessing?
must he not be precessing?
must we not be precessing?
must you not be precessing?
must they not be precessing? 	must I not have precessed?
must you not have precessed?
must he not have precessed?
must we not have precessed?
must you not have precessed?
must they not have precessed? 	must I not have been precessing?
must you not have been precessing?
must he not have been precessing?
must we not have been precessing?
must you not have been precessing?
must they not have been precessing?