3 sentences for 群 (qún — online group)

1. 这个群里有人在开车。

   zhè gè qún lǐ yǒu rén zài kāi​chē.

   Someone is posting suggestive content in this group chat.

   Source: Dong Chinese Dictionary

2. 我被拉进了一个微信群。

   wǒ bèi lā​jìn le yī gè Wēi​xìn qún.

   I was added to a WeChat group.

   Source: Dong Chinese Dictionary

3. 他在群里潜水很久了，从来不发言。

   tā zài qún lǐ qián​shuǐ hěn jiǔ le, cóng​lái bù fā​yán.

   He has been lurking in the group for a long time and never posts anything.

   Source: Dong Chinese Dictionary