My biggest challenge is learning how to behave at the dinner table.分析一下句子的成分.
问题描述：
My biggest challenge is learning how to behave at the dinner table.分析一下句子的成分.
答
主语：My biggest challenge
谓语：is learing
宾语：how to behave at the dinner table
主语中：
My biggest 做定语修饰名词 challenge
谓语中：
用的是现在进行时 be doing
宾语中：
这里是个由how引导的宾语从句