2 sentences for 一个 (yī​ge — a)

1. 我有一个好主意。

   wǒ yǒu yī​ge hǎo zhǔ​yi.

   I have a good idea.

   Source: Dong Chinese Dictionary

2. 你不用自己一个人去面对。

   nǐ bù​yòng zì​jǐ yī​ge rén qù miàn​duì.

   You don't have to face it alone.

   Source: OpenSubtitles