Q:

"If you don't keep quiet I shall shoot you", he said to her in a calm voice.

• 1
  He warned her to shoot if she didn’t
• 2
  He said calmly that I shall shoot you if you don
• 3
  He warned her calmly that he would shoot her if she didn’t
• 4
  Calmly he warned her that be quiet or else he will have to shoot her.