2 sentences

1. 你为什么突然改变态度？

   nǐ wèi​shén​me tū​rán gǎi​biàn tài​du?

   Why did you suddenly change your attitude?

   Source: OpenSubtitles

2. 你要改变态度。

   nǐ yào gǎi​biàn tài​du.

   You need to change your attitude.

   Source: OpenSubtitles