Question

that day 还是on that day

Answer 1

都对；
on that day:在那一天,是时间状语；
that day：那天，可以做主语，宾语，表语， 时间状语。
that day比on that day更口语化、更常用，在意义上基本上没有太大差异，均表示“当天，那天”。不过，on that day的时间概念更为明确一些，可翻译为“在那天，在当天，在那一天”。

扩展资料

　　On that day, the realm of France received on parchment a stupendous accession.

　　那一天，法国的'领土在羊皮纸的文件上获得了绝大的扩张。

　　He would give her a date and ask her to tell him about the world events on that day.

　　他给出一个日期，让她说出那天发生的世界大事。

　　Are you free on that day?

　　那天你有空吗?

　　The article is an accurate reflection of events that day.

　　这篇文章准确地记录了那天发生的事。

　　He was not in a good mood that day.

　　他那天心情不好。