1.He said that he might not go to work the next day.
2.He said he was very hungry.
3.She told me that she was going to get married on Jany（打错了吧） 1st.
4.He/she told me the sun rises in the east and sets in the west.
5.He said he was watering the flowers in the garden.
第四句不必改从句时态的原因是,对于真理,变间接引语时不用改时态.