Syntax
			Short answers
			
To avoid repetition in conversations, we often use short
  answers.
  - "Are you John?" "Yes, I am
    [John]."
    
 
  - "Did you lock the door?" "No, I didn't
    [lock the door]."
 
A short affirmative answer cannot end with a contraction of the verb be.
  - Are you English?
 
  - Yes, I am. / No,
    I am not. / No, I'm not.
    NOT: Yes, I'm. 
When an auxiliary verb is used in the question, the same auxiliary verb is
  used in the short answer.
  -  "Do you like
    beer?" "Yes, I do." / "No,
    I don't."
 
  -  "Would you like
    a beer?" "Yes, I would." / "No,
    I wouldn't."
 
  -  "Can you swim?"
    "Yes, I can." / "No, I
    can't."
 
  -  "Will you remember?"
    "Yes, I will." / "No, I
    won't."
 
  -  "Did you see
    Oscar?" "Yes, I did." / "No,
    I didn't."
 
  -  "Are you enjoying
    the meal?" "Yes, I am." / "No,
    I am not." / No, I amn't.
 
  -  "Were you living
    in London?" "Yes, I was." / "No,
    I wasn't." 
 
  - "Have you
    seen Wally?" "Yes, I have." / "No,
    I haven't."