Please correct

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. The plaintiff makes narration of his pleadings in a lawsuit.
  2. The defendant can respond to the pleading by offering a counternarrative.
  3. If the pleadings of the plaintiff is legally adequate, the trial to determine the truth can begin in the court.
    Please correct the above sentences.
    Thanks.
2

It’s difficult to see exactly what you want to say, but possibly:

  1. The plaintiff narrates his plea in a lawsuit.
  2. The defendant can respond to the plea by offering a counter-narrative.
  3. If the plea of the plaintiff is legally adequate, the trial to determine the truth can begin in court.