there are plenty of things about city life in the future which are not certain.句子成分分析
问题描述：
there are plenty of things about city life in the future which are not certain.句子成分分析
答
there(引词） are（谓语） plenty of things（主语） about city life （修饰things的后置定语）in the future修饰life的后置定语） which are not certain(修饰city life的定语从句）