5 sentences

1. 至少让我们帮帮忙吧。

   zhì​shǎo ràng wǒ​men bāng​bang​máng ba.

   At least let us help.

   Source: OpenSubtitles

2. 我可以帮帮忙。

   wǒ kě​yǐ bāng​bang​máng.

   I can help out.

   Source: OpenSubtitles

3. 你得帮帮忙。

   nǐ děi bāng​bang​máng.

   You have to help.

   Source: OpenSubtitles

4. 这活儿我一个人干不了，你能不能过来帮帮忙？

   zhè huó​r wǒ yī gè rén gàn bù liǎo, nǐ néng bù néng guò​lái bāng​bang​máng?

   I can't handle this job alone; could you come over and give me a hand?

   Source: Dong Chinese Dictionary

5. 帮帮忙，你这种鬼话谁会相信啊？

   bāng​bang​máng, nǐ zhèi zhǒng guǐ​huà shéi huì xiāng​xìn a?

   Give me a break! Who would believe such nonsense?

   Source: Dong Chinese Dictionary