1.so...that 表示结果
如：She is so young that she can't go to school.
2.so that 表示目的
如：She got up early so that she could catch the early bus,
3.Mary's and Jhon's 表示两人各有的
Mary and Jhon's 表示两人共有的
4.feeling的单复数问题与普通的名词单复数用法差不多.