2 sentences for 一个人 (yī​gè​rén — unaided)

1. 你一个人没问题吗？

   nǐ yī​gè​rén méi wèn​tí ma?

   Will you be okay alone?

   Source: OpenSubtitles

2. 这件事情我一个人就能完成。

   zhè jiàn shì​qing wǒ yī​gè​rén jiù néng wán​chéng.

   I can finish this task by myself.

   Source: Dong Chinese Dictionary