3 sentences

1. 他喜欢自个儿待着。

   tā xǐ​huan zì​gě​r dāi zhe.

   He likes being by himself.

   Source: Dong Chinese Dictionary

2. 他自个儿在那儿坐着呢。

   tā zì​gě​r zài nà​r zuò zhe ne.

   He is sitting there by himself.

   Source: Dong Chinese Dictionary

3. 这么多菜我自个儿也吃不完，你也来吃点吧。

   zhè​me duō cài wǒ zì​gě​r yě chī bù wán, nǐ yě lái chī diǎn ba.

   I can't finish all this food by myself, so why don't you join me and have some?

   Source: Dong Chinese Dictionary