日后的英文：
sometime
someday (in the future)

参考例句：

The cod was salted away for future use.
鳕鱼已用盐腌起留着日后吃。

Nixon's tapes were made to be deposited in the Nixon Presidential Library for the use of future researchers.
尼克松的录音带原打算存放在尼克松总统图书馆里，供日后的研究人员参考用。

advance pending reimbursement
预支以待日后付还

To make provision for the future
准备日后之需

The economic prognosis was equally downbeat.
对日后经济的预测也是同样让人沮丧。

Early mistakes are the seeds of future trouble
早期的错误可以酿成日后的麻烦

The meat was salted away for future use.
肉腌了起来，以备日后食用。

Later findings verified the scientist’s theory
日后的发现证实了那位科学家的理论。

The eighth day after a feast day,counting the feast day as one.
第八天教会节日后从该日算起的第八天

Lay up... in lavender
(为供日后使用而)珍惜保存

sometime是什么意思：
adv. 某个时间，改天
adj. 从前的，一度的

Sometimes it was a palpitation, sometimes a flutter; sometimes it was a sort of gasp or gurgle.
有时候是一种颤动的声音，有时候是一种拍打声音，有时候是一种喘气和咯咯的声音。

Sometimes she spoke sensibly; sometimes she rambled.
有时她讲话很有条理，有时则讲得漫无边际。

The beginning and end of strokes are sometimes square and sometimes rounded.
用笔有方有圆，或方圆兼济。

someday是什么意思：
ad. 有一天

I'll hit a streak someday.
有一天我会走段好运。

Even if someday you do not, I will wait.
即使有一天你一去不返，我也会等候。

Young Columbus dreamed of crossing the ocean someday to the greatbeyond.
年轻时的哥伦布梦想有一日渡过大洋到达远方的彼岸。

future是什么意思：
n. 未来；前途；期货；将来时
adj. 未来的，将来的

He felt confident in the future.
他对未来充满信心。

Their future looked black.
他们的前途暗淡。

future preterit(e)
过去将来时