4 sentences

1. 你只是精疲力尽了。

   nǐ zhǐ​shì jīng​pí​lì​jìn le.

   You're just exhausted.

   Source: OpenSubtitles

2. 我只是精疲力尽了。

   wǒ zhǐ​shì jīng​pí​lì​jìn le.

   I'm just exhausted.

   Source: OpenSubtitles

3. 我精疲力尽。

   wǒ jīng​pí​lì​jìn.

   I'm exhausted.

   Source: OpenSubtitles

4. 连续加班一周后，他已经精疲力尽了。

   lián​xù jiā​bān yī zhōu hòu, tā yǐ​jīng jīng​pí​lì​jìn le.

   After working overtime for a week straight, he is exhausted.

   Source: Dong Chinese Dictionary