最高级是the most boring。boring的比较级是more boring。boring属于由“动词+后缀-ing/-ed”构成的形容词，在词前加more构成比较级；由“动词+后缀-ing/-ed”构成的形容词，在词前加most构成最高级。
boring双语例句
What a boring life we have! said one bucket to the other ．
"我们的生活真无聊！"一只桶对另一只说。
She was good at physics despite the fact that she found it boring.
尽管她认为物理枯燥无味，她却学得很好。
She found her job very boring.
她觉得自己的工作很无聊。
He is living proof that not all engineers are boring.
并非所有工程师都缺乏情趣，他就是活生生的例子。
It was so boring ─ I mean, nothing happened for the first hour!
真是无聊——我是说，一个小时都过去了，什么事儿都没发生。