2 sentences for 擺 (bǎi — swing)

1. 他向我摆了摆手表示再见。

   tā xiàng wǒ bǎi le bǎi shǒu biǎo​shì zài​jiàn.

   He waved his hand at me to say goodbye.

   Source: Dong Chinese Dictionary

2. 由于受到了惊吓，大鱼摆摆尾巴潜到了水底。

   yóu​yú shòu​dào le jīng​xià, dà yú bǎi bǎi wěi​ba qián dào le shuǐ​dǐ.

   Startled, the large fish flicked its tail and dove to the bottom.

   Source: Dong Chinese Dictionary