Q:

I said to my sister, “I bought you a doll yesterday.”

• 1
  I told my sister that I brought you a doll the previous day.
• 2
  I told my sister that I had brought her a doll the previous day.
• 3
  I told my sister that I had brought her a doll yesterday.
• 4
  I told my sister that I brought her a doll yesterday.