They are chatting online!

他们正在网上聊天。

I like chatting online.

我喜欢网上聊天。

His parents prevented him from chatting online.

他的父母不让他网上聊天。

I try to improve my English by chatting online.

我正通过网上谈天来提高我的英语。

Where are the children? They are chatting online.

孩子们在哪里？他们在网上聊天。