on that day和that day的區(qū)別主要在于用法及在句中代表的成分。on that day的中文含義為“在那天”，表示句子中的時間狀語；that day的中文含義為“那天”，在句中可作主語、賓語、表語，也可作時間狀語。
一、on that day的含義及用法
on that day意為在那天，在句中作時間狀語。
例句：Are you free on that day?
那天你有空嗎?
On that day, I decided not to let anger control me any longer.
那天,我決定不再讓憤怒控制我。
And we were out of town on that day.
那天我們一起出城了。
And data collected on that day is also of great use in the long run.
而且雙十一收集的數(shù)據(jù)長遠來看也大有用處。
We don't exactly know what happened on that day
我們不知道那一天實際發(fā)生了什么
On that day last August, they were rather the opposite.
而在8月底的那一天，我看到的根本是敵對的反面。
Are you going to attend the seminar on that day?
你打算參加那天的研討會嗎？
On that day, they let us out of school basically as soon as we got there.
那天我差不多剛到學(xué)校學(xué)校就讓我們回來了。
二、that day的意思及用法
that day意為那天，在句中可作主語、賓語、表語，也可作時間狀語。
例句：The memory of that day was indelibly printed on his brain.
那天的記憶永不磨滅地深印在他的腦海里。
She gave us her version of what had happened that day.
她從她的角度向我們描述了那天發(fā)生的事情。
He's borne me a grudge ever since that day.
從那一天起他便對我懷恨在心。
For once, fortune was on our side: the sun shone that day.
只有那次我們運氣好，那一天陽光普照。
He was exulting in a win at the show earlier that day
他正在為當(dāng)天早些時候在節(jié)目中勝出而歡欣鼓舞。
That day marked the beginning of a 20-year estrangement.
從那一天開始了長達20年的互不往來。
