3 sentences

1. 他连连摆手，示意我不要再说了。

   tā lián​lián bǎi​shǒu, shì​yì wǒ bù yào zài shuō le.

   He waved his hand repeatedly, gesturing for me to stop talking.

   Source: Dong Chinese Dictionary

2. 面对大家的赞扬，他连连摆手，表现得非常谦虚。

   miàn​duì dà​jiā de zàn​yáng, tā lián​lián bǎi​shǒu, biǎo​xiàn de fēi​cháng qiān​xū.

   In the face of everyone's praise, he waved his hand repeatedly and acted very modestly.

   Source: Dong Chinese Dictionary

3. 跑步时，自然的摆手可以帮助保持平衡。

   pǎo​bù shí, zì​rán de bǎi​shǒu kě​yǐ bāng​zhù bǎo​chí píng​héng.

   Swinging your arms naturally while running helps you keep your balance.

   Source: Dong Chinese Dictionary