同学们再见英语怎么说怎么写

"Goodbye, classmates" 可以说成 "同学们再见" 或 "Classmates, goodbye"。其中 "goodbye" 是英语中常用的告别语，它的词源是古英语 "god" 和 "bēo" 的组合，意思是 "God be with you"。

例句：

"Goodbye, classmates. I'll see you next semester." (同学们再见。我下学期见。)
"Classmates, it's been a pleasure studying with all of you. Goodbye." (同学们，和你们一起学习是一种荣幸。再见。)