Answer:
- The sentence may be changed to active voice because it has an active verb, which must be changed to the verb's past particple.
- The verb <em>"encontramos"</em> must be changed to "<em>foi encontrado</em>".
Explanation:
The question in English is: 
- The sentence "One day we found a dead goat", can be changed to the passive voice because it has what verb?
The answer is that the sentence can be changed to passive voice because it has an active verb. The active verb is "encontramos" (found).
To pass to passive voice, you have to change the active verb to verb’s past participle.
Thus, "encontramos" has to be changed to "foi encontrado". 
This change means that the deat goat was found. By changing to passive voice, the new sentence will not contain the information about who found the dead goat.
In Portuguese, the changed sentece will be:
- "Um dia um bode morto foi encontrado".
Which in English is "One day a dead goat was found".
 
        
             
        
        
        
Eu não falo bem português, então me desculpe se eu cometer um erro. Para o título, eu sempre escrevo "(Título do livro) Relatório de redação".
Sobre o que é o texto da opinião? Talvez eu possa ajudá-lo a escrever :)
 
        
             
        
        
        
I agree yeah it’s diamonds
        
                    
             
        
        
        
What is the question? 
Can you post it under this message?
        
             
        
        
        
A person who dislikes/ doesn't like human kind, or human society.