2 sentences for 勁 (jìn — enthusiasm)

1. 我是想给她鼓鼓劲儿。

   wǒ shì xiǎng gěi tā gǔ gǔ jìn r.

   I was trying to encourage her.

   Source: OpenSubtitles

2. 听到要去郊游，孩子们立刻来了劲。

   tīng​dào yào qù jiāo​yóu, hái​zi men lì​kè lái le jìn.

   The kids got all excited when they heard about the outing.

   Source: Dong Chinese Dictionary