Sajid said, "Alas! How foolish I have been"!

Correct indirect speech: Sajid exclaimed with sorrow that he had been very foolish.

• Why use "exclaimed with sorrow"? "Alas! How foolish I have been!" is an exclamation expressing regret. "Exclaimed" shows the exclamatory tone and "with sorrow" conveys the feeling.

• Tense change: "have been" becomes "had been" in reported speech (present perfect → past perfect).

• Use of connector: use "that" to introduce the reported clause. Using "as" is incorrect because it does not properly introduce reported speech here.

• Other errors to avoid: ensure the speaker's name is unchanged and avoid switching to present tense like "is very foolish"; the correct tense is "had been."

• Summary: convert the exclamation by choosing an exclamatory reporting verb, shift the tense to past perfect, and use "that" to introduce the reported clause.