GO BACK OR COME BACK

go back

1. 回去
Let's go back home now.
咱们现在回家吧。
2. 追溯
His family goes back to the 18th century.
他的家族可追溯至十八世纪。

come back

1. 回来
She came back two hours later.
她两小时后回来了。
2. 记起
It's suddenly come back to him where he saw her last.
他突然记起上次看到她的地方。
3. 恢复原状;重新流行
Short skirts are coming back.
短裙子又开始流行了。

Go back
是回去
Come back 回来
两个都可以用
如说话人 在A地点 让其他人回到A地点
就可以说Come back
如果说话人 从某地到另一个地方 再回去 就可以说 Go back
eg: Mum ， when do you come back?

It's so late. Let's go back home