Explanation
      1. Recognise the given form
       is the  form of the  .
      2. Change the form
      
        The answer is the  form of the word because the question asked for the  version.
        The question asked for the  version. However, this was already the case and so it was a trick question.
       
      
        The answers are the  forms of the word because the question asked for a  version.
        The question asked for a  form of the word. However, this was already the case and so it was a trick question.
       
      3. Produce the required form
      The correct answer is the
         form: 
      
      
        
          The possible correct answers are the  forms: