Reported Speech

 General Explanation - Common Reporting Verbs

https://dictionary.cambridge.org/us/grammar/british-grammar/reported-speech_2

https://www.wallstreetenglish.com/blog/direct-and-indirect-speech-exercises/

How to Report Different Tenses (Includes Grammar Test)

https://learnenglish.britishcouncil.org/grammar/intermediate-to-upper-intermediate/reported-speech-1-statements

Exercises

https://www.ego4u.com/en/cram-up/grammar/reported-speech/exercises?10

https://www.englisch-hilfen.de/en/exercises/reported_speech/sentences.htm