‘You must take these tablets twice a day.’ >> The doctor says...
The doctor says (that) I must take the/ those tablets twice a day.
‘I’m going to the gym tomorrow.’ >> Ben told me...
Ben told me (that) he was going to the gym the next day/ the following day.
‘You don’t have to wait for me.’ >> Liz said that I...
Liz said that I didn’t have to wait for her.