5 Simon said that he was sorry.
6 I told you that you must be quiet. (***must заменяется в косвенной речи на had to, если must выражает необходимость совершения действия в силу определенных обстоятельств, но в данном случае must выражает приказание/совет, поэтому остается без изменения)
7 Kevin told me that Jo had a new car.
5. Simon said that he was sorry.
6. I told you that you should be quiet.
7. Kevin told me that Jo had a new car.
