He said, "I have been working since sunrise" Make it indirect speech.

Direct speech এর tense---Present Indefinite tense হলে Inderect speech এর tense--Past Indefinite,Present continuous---Past continuous,Present perfect--Past perfect,Present perfect continuous---Past perfect continuous, Past Indefinite--Past Perfect,Past continuous---Past perfect continuous tense হবে।Reporting verb যদি present/future tense হয়, তাহলে reported speech এর verb অপরিবর্তিত থাকে।Do it vice-versa. (if needed).