2 sentences

1. 他的自我意识非常强。

   tā de zì​wǒ yì​shí fēi​cháng qiáng.

   He has a very strong sense of self.

   Source: Dong Chinese Dictionary

2. 他在取得一点成绩后，自我意识就开始膨胀。

   tā zài qǔ​dé yī​diǎn chéng​jì hòu, zì​wǒ yì​shí jiù kāi​shǐ péng​zhàng.

   After achieving a little success, his ego began to swell.

   Source: Dong Chinese Dictionary