can precess
Verbo regular: precess - precessed- precessed

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

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't precess
you can't precess
he can't precess
we can't precess
you can't precess
they can't precess 	I can't be precessing
you can't be precessing
he can't be precessing
we can't be precessing
you can't be precessing
they can't be precessing	I can't have precessed
you can't have precessed
he can't have precessed
we can't have precessed
you can't have precessed
they can't have precessed	I can't have been precessing
you can't have been precessing
he can't have been precessing
we can't have been precessing
you can't have been precessing
they can't have been precessing	

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

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