2 sentences for 充 (chōng — to serve as)

1. 一件红色外套充当毯子。

   yī​jiàn hóng​sè wài​tào chōng​dāng tǎn​zi.

   A red coat served as a blanket.

   Source: CCMatrix

2. 你上司的工作，充其量是帮助你成功。

   nǐ shàng​si de gōng​zuò, chōng​qí​liàng shì bāng​zhù nǐ chéng​gōng.

   Your boss’s job, at best, is to help you succeed.

   Source: CCMatrix