sometimes it isn't easy being the new kid at school中 being为什么加ing不是to be吗

问题描述:

sometimes it isn't easy being the new kid at school中 being为什么加ing不是to be吗

这是定语从句吧,有时它并不容易,什么不容易呢,就是后面的being the new kid at school.
可以这样理解,being the new kid at school is not easy sometimes.be作为主语,要加Ing的