could precode
Verbo regular: precode - precoded- precoded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could precode
you could precode
he could precode
we could precode
you could precode
they could precode 	I could be precoding
you could be precoding
he could be precoding
we could be precoding
you could be precoding
they could be precoding	I could have precoded
you could have precoded
he could have precoded
we could have precoded
you could have precoded
they could have precoded	I could have been precoding
you could have been precoding
he could have been precoding
we could have been precoding
you could have been precoding
they could have been precoding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't precode
you couldn't precode
he couldn't precode
we couldn't precode
you couldn't precode
they couldn't precode 	I couldn't be precoding
you couldn't be precoding
he couldn't be precoding
we couldn't be precoding
you couldn't be precoding
they couldn't be precoding	I couldn't have precoded
you couldn't have precoded
he couldn't have precoded
we couldn't have precoded
you couldn't have precoded
they couldn't have precoded	I couldn't have been precoding
you couldn't have been precoding
he couldn't have been precoding
we couldn't have been precoding
you couldn't have been precoding
they couldn't have been precoding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I precode?
could you precode?
could he precode?
could we precode?
could you precode?
could they precode? 	could I be precoding?
could you be precoding?
could he be precoding?
could we be precoding?
could you be precoding?
could they be precoding? 	could I have precoded?
could you have precoded?
could he have precoded?
could we have precoded?
could you have precoded?
could they have precoded? 	could I have been precoding?
could you have been precoding?
could he have been precoding?
could we have been precoding?
could you have been precoding?
could they have been precoding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I precode?
couldn't you precode?
couldn't he precode?
couldn't we precode?
couldn't you precode?
couldn't they precode? 	couldn't I be precoding?
couldn't you be precoding?
couldn't he be precoding?
couldn't we be precoding?
couldn't you be precoding?
couldn't they be precoding? 	couldn't I have precoded?
couldn't you have precoded?
couldn't he have precoded?
couldn't we have precoded?
couldn't you have precoded?
couldn't they have precoded? 	couldn't I have been precoding?
couldn't you have been precoding?
couldn't he have been precoding?
couldn't we have been precoding?
couldn't you have been precoding?
couldn't they have been precoding?