be swollen with pride; be conceited

• 自以为了不起

be swollen with pride; be conceited的用法和样例：

例句

1. He's infatuated with his own importance.
   他自以为了不起而飘飘然。
2. He felt grown-up, puffed up with self-importance.
   他觉得长大了，便自以为了不起。