4 sentences

1. 最近你有点心不在焉。

   zuì​jìn nǐ yǒu​diǎn xīn​bù​zài​yān.

   Lately, you've been a little distracted.

   Source: OpenSubtitles

2. 我喜欢心不在焉的人。

   wǒ xǐ​huan xīn​bù​zài​yān de rén.

   I like absent-minded people.

   Source: OpenSubtitles

3. 你看起来有点心不在焉。

   nǐ kàn​qǐ​lai yǒu​diǎn xīn​bù​zài​yān.

   You seem a little distracted.

   Source: OpenSubtitles

4. 他今天听课时心不在焉，总是在看窗外。

   tā jīn​tiān tīng​kè shí xīn​bù​zài​yān, zǒng​shì zài kàn chuāng wài.

   He was absent-minded during the lecture today, always looking out the window.

   Source: Dong Chinese Dictionary