报到英文是 "report for duty"。这个短语来源于军事用语，表示在开始服役前，将士需要到指定地点报道，告知军方自己已经到达并准备开始服役。例句：

I'm here to report for duty, sir.

The new recruits are expected to report for duty at 0800 hours tomorrow.

Please make sure to report for duty on time and in full uniform.