英语语法a healthy diet is one of the most important ways you can

a healthy diet【主语】 is【谓语】 one of the most important ways【宾语】 you can maintain an active lifestyle【定语从句修饰ways】,省掉了关系词in which
he was a man famous for his escape.
famous for his escape其实是做后置定语
当然你也可以理解为定语从句
he was a man who is famous for his escape

a healthy diet 主语
is 谓语
one of the most important ways 表语
you can maintain an active lifestyle ways的定语从句
for his escape 做原因状语
正句是主系表结构

famous for his escape？以逃跑闻名
出了名的胆小鬼

you can maintain an active lifestyle 作定语从句
famous for his escape 定语