那个人在对你使劲儿的挥手。

Nà gè rén zài duì nǐ shǐjìnr de huīshǒu.

That person is waving vigorously at you.

她跳舞的时候太使劲儿了，不小心弄伤大腿了。

Tā tiàowǔ de shíhou tài shǐjìnr le, bù xiǎoxīn nòngshāng dàtuǐ le.

She danced too hard and accidentally hurt her thigh.

我的女儿一听到音乐就会使劲儿地跳舞。

Wǒ de nǚ'ér yì tīngdào yīnyuè jiù huì shǐjìnr de tiàowǔ.

My daughter dances vigorously when she hears music.