1
a one-time + noun
用于可数名词前，表示‘曾经的’.
He is a one-time friend.
他曾经是我的朋友。
以前的，一度的
先理解核心含义，再看它在真实句子里的用法。
以前的，一度的
belonging to some prior time
He is a one-time friend.
他曾经是我的朋友。
指过去某个时间点的
与过去特定时间段有关的,不延续到现在
Of or pertaining to a specific period of time in the past, not extending to the present.
以前的
belonging to some prior time
仅发生或使用一次然后不再
Occurring or used in a single instance and then never again.
He is a one-time champion who now coaches young athletes.
他曾是冠军，现在指导年轻运动员。
The one-time factory building has been converted into a modern art gallery.
那座昔日的厂房已被改造成现代艺术画廊。
She was a one-time colleague of mine before she moved to another city.
她曾是我的同事，后来搬到了另一个城市。
用于可数名词前，表示‘曾经的’.
He is a one-time friend.
他曾经是我的朋友。
She was my one-time boss.
她曾是我的老板。
定冠词the表示特指.
The one-time champion has retired.
那位曾经的冠军已经退休了。
Not this
He was one-time a teacher.
Use this
He was once a teacher.
'one-time' 是形容词，不能用作副词；表示'曾经'时应使用副词 'once'。
Not this
He is a one-time from that company.
Use this
He is a one-time employee from that company.
'one-time' 是形容词，需要修饰名词；不能单独作名词使用。
Choose the next layer that will help you use one-time with more confidence.
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use one-time naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.