1) You must go to bed at 11 p.m.
Gregory had to go to bed at 11 p.m.
2) You must take the map with you.
Gregory had to take the map with him
3) You must spend more time on your homework.
Gregory had to spend more time on his homework.
4) You must come back at ten tonight
Gregory had to come back at ten that night.
5) You must wear your uniform at school.
Gregory had to wear his uniform at school.
6) You must read to your younger brother.
Gregory had to read to his younger brother.