Answer:
1. Tina said she had written a lot of poems.
2. Jenny asked Nina to play the guitar.
3. Aryan asked Sona who had told her that.
4. Sunita told her that her father had invited her.
5. He told me that his name's written on that paper.
6. She asked me to call her.
7. Hema said she had broken that cup.
8. Anu asked Tina to do that.
9. She asked me why I was laughing.
10. She told her mother she was very tired.
11. He said he had seen him the day before with his brother.
12. She asked me where I was going.
13. Nina said she could solve that puzzle.
14. The boys said they would arrange a party.
15. The teacher told Sohan to get out of the class.
16. The workers said they are working in that factory.
Step-by-step explanation:
Indirect speech allows us to communicate what another person has said without using speech marks and paraphrasing the content of what they said.
When reporting something that has been said in the present simple tense, the tense remains the same, and it´s the subject that changes.
On the other hand, to report sentences in the past tense, the tense changes to a further past. For example, a sentence in the simple past tense changes to past perfect in indirect speech.