1.We have lunch in the morning.
@ If it is a specific time period in one day's morning ,afternoon,evening,we use IN
2.we don't go to school on Saturday and Sunday.
@If it is a specific time for one day,we use ON.
3I go to bed at half past ten.
@if it is a specific clock time,we use AT
4.we go to shanghai in December.
@ before Month ,we use IN
5.jim and li lei swim together.
@ Here we should use Adverb instead of prepositions.
6The teacher came to the school on September 10th.
@ Same as 2.
7 Uncle Zhang often goes to work with Mike.
@ Here shows "to accompany",so we use with.