他现在正在和他的同学们谈话。

He is now talking to his schoolmates.

他向他的同学求助数学作业。

He asked his schoolmate for help with the math homework.

她经常和她的同学在图书馆学习。

She often studies with her schoolmate in the library.

午休时，我通常和我的同学聊天。

During lunch break, I usually chat with my schoolmate.

在聚会上，我和许多老同学叙旧。

During the reunion, I caught up with many old schoolmates.