I am not sure if I have to change must to “has to” or “had to” for this transformation question:
Question: Jean said, “Everybody must pay careful attention during each session.”
The speech verb is past tense, so I thought the answer is: Jean said that everybody had to pay careful attention during each session.
However, this instruction is on-going so should I use ‘has to’ instead? (Even though the speech verb is in past tense).