自命不凡

例句：

1. 1. He has aself-important attitude towards his work.
   他对工作的态度很自负。
2. 2. She was always conceited about her looks.
   她总是对自己的外表很自负。
3. 3. The young man's self-important behavior annoyed everyone around him.
   这个年轻人的自负行为让周围的人都感到恼火。