2 sentences

1. 你冤枉他了，这事儿真不是他干的。

   nǐ yuān​wang tā le, zhè shì​r zhēn bù shì tā gàn de.

   You've wronged him; he really didn't do it.

   Source: Dong Chinese Dictionary

2. 要是买个没用的东西回来，那钱就花得太冤枉了。

   yào​shi mǎi gè méi​yòng de dōng​xi huí​lai, nà qián jiù huā de tài yuān​wang le.

   If you buy something useless, that money is wasted for nothing.

   Source: Dong Chinese Dictionary