Indirect Speech: The teacher asked the boys if they had done their homework and requested them to explain in detail.

Explanation:

Heading: Introduction to Direct and Indirect Speech

Direct and Indirect Speech are two different ways of reporting statements, questions, and commands made by someone else. Direct Speech is when we report someone's exact words, whereas Indirect Speech is when we report what someone said without using their exact words.

Heading: Changing Direct Speech to Indirect Speech

To change Direct Speech to Indirect Speech, we need to follow certain rules. The rules are as follows:

- We change the tense of the verb in the reported speech to match the tense of the reporting verb.
- We change the pronouns and possessive adjectives in the reported speech to match the subject of the reporting verb.
- We change the time and place expressions in the reported speech to match the time and place of the reporting verb.
- We change the reporting verb to an appropriate reporting verb depending on the context.

Heading: Example

Direct Speech: The teacher said to the boys, "Have you done your homework? Explain in details."

Indirect Speech: The teacher asked the boys if they had done their homework and requested them to explain in detail.

Explanation: Here, we have changed the tense of the verb "have" to "had" to match the tense of the reporting verb "asked" in the Indirect Speech. We have also changed the pronouns "you" to "they" and possessive adjective "your" to "their" to match the subject "boys" in the Indirect Speech. The time and place expressions remain the same as there are none in the Direct Speech. Lastly, we have changed the reporting verb "said" to "asked" and added the appropriate conjunction "if" to make it a question.

Conclusion:

In conclusion, Direct and Indirect Speech are important concepts in English Grammar that help us to report what someone else has said. To change Direct Speech to Indirect Speech, we need to follow certain rules, which include changing the tense of the verb, pronouns, possessive adjectives, time and place expressions, and the reporting verb.

The teacher asked the boys whether they have done their work