To change direct speech to indirect speech, you need to follow these steps:
Identify the Sentence Type : In this case, the direct speech is an imperative sentence, which is a command or request.
Remove Quotation Marks : In indirect speech, quotation marks are not used.
Use Reporting Verbs : The verb "said to" is usually changed to "told" when changing to indirect speech.
Change Pronouns and Possessive Adjectives : Adjust pronouns and possessive adjectives to fit the perspective of the reporting speaker.
Omit the Conjunction : Imperatives in reported speech often use the infinitive form with 'to'.
With these rules in mind, here is how the sentence changes:
Direct Speech: The man said to the boy, "Be careful of your handwriting."
Indirect Speech: The man told the boy to be careful of his handwriting.
In this transformation, "said to" is changed to "told", the imperative "Be careful" becomes "to be careful", and "your handwriting" is adapted to "his handwriting" to fit the third-person perspective.