be on leave
on leave 表示处于休假状态，常与 be 动词连用，后面可跟时间或地点。
She has been on leave since Monday.
她从周一起一直在休假。
休假；请假；准假
leaves — plural of leave
不击球；让球飞过；（台球等）一杆后的球势；剩余球位；（拼字游戏）留在字母架上的字母；剩余字母；击球手不试图击球的动作；准许缺席；离开工作的时间
Time away from work that one is allowed to take; permission to be absent.
击球手不试图击球的动作
The action of the batsman not attempting to play at the ball.
准许缺席；离开工作的时间
Permission to be absent; time away from one's work.
击球后剩余的球的布局,决定下一名击球者的选择优劣
The arrangement of balls in play that remains after a shot is made (which determines whether the next shooter — who may be either the same player, or an opponent — has good options, or only poor ones).
玩家回合结束后字架上剩余的字母牌
The tiles remaining on a player's rack after his or her turn.
She took leave of her friends before departing.
她在离开前向朋友们告别。
用法提示：此处 leave 为名词，表示“告别”的动作。
He is on annual leave from his job.
他正在休年假。
用法提示：此处 leave 为名词，表示“休假”的期间。
The manager gave him leave to go early.
经理允许他早走。
用法提示：此处 leave 为名词，表示“许可”。
on leave 表示处于休假状态，常与 be 动词连用，后面可跟时间或地点。
She has been on leave since Monday.
她从周一起一直在休假。
take leave 表示请假；申请请假则说 ask for leave。
I need to take leave next month.
我下个月需要请假。
leave of absence 指获准的一段时间的离职休假，多用于工作或学业场合，复数形式为 leaves of absence。
The company granted him a leave of absence.
公司批准他休假一段时间。
grant 后先接人再接 leave，表示批准某人休假，也可用 give sb leave。
The captain granted the soldiers leave for the weekend.
上尉批准士兵们周末休假。
与leave的多数用法可替换，如“take time off”≈“take leave”；但更口语化，正式文件里多用leave。
美式用语，多指休息或旅行；不用于sick leave、maternity leave等特定类型的leave。
英式用语，等同于美式vacation；也可泛指公共假日。
特指长期（常为一年）的专业休假，不是一般意义上的leave代用词。
grammar · medium
易错句子I will be in leave next week.
正确表达I will be on leave next week.
表示“休假、请假”时，leave 前用固定介词 on，不用 in；汉语说“在休假”容易直译成 in leave，但英语只有 on leave。
grammar · medium
易错句子He is on a sick leave today.
正确表达He is on sick leave today.
sick leave 表示“病假”时是不可数短语，前面不加 a/an；on sick leave 是固定搭配。汉语的“请一个病假”容易带出多余的 a。
grammar · medium
易错句子I have five days leave this year.
正确表达I have five days' leave this year.
表示“五天的假”时，英语用复数时间名词的所有格 days' 来修饰 leave；汉语没有名词所有格，所以容易漏掉撇号。也可说 five days of leave。
此义项为‘获准的休假/请假’（leave of absence）；work 作为名词指工作/劳动，与休假相对，不适用于‘不击球’或‘球势’等义项。
此义项为‘获准缺席/不在岗’；attendance 表示出勤、在场，与 leave 的缺席义相对。
此义项指获准的不在岗时间；duty 强调在岗执勤，常构成 on leave 与 on duty 的对比。
年假
I have thirty days of annual leave each year.
我每年有三十天年假。
病假
He is on sick leave after the operation.
他手术后正在休病假。
产假
She will take maternity leave next month.
她下个月开始休产假。
带薪休假
The company offers paid leave to all employees.
公司为所有员工提供带薪休假。
准假；请假
He requested a leave of absence to care for his mother.
他请假去照顾母亲。
休假中
She is currently on leave, so please contact her deputy.
她目前休假中，请联系她的副手。
常与 leave 连用，构成 annual leave（年假）。
常与 leave 连用，构成 sick leave（病假）。
常与 leave 连用，构成 maternity leave（产假）。
常与 leave 连用，构成 paternity leave（陪产假）。
常与 leave 连用，构成 unpaid leave（无薪假）。
行为失常；发疯
Have you taken leave of your senses? You're going out in this storm?
你疯了吗？你要在暴风雨中出门？
准假；休假
She applied for a leave of absence to look after her sick father.
她申请休假去照顾生病的父亲。
告别；辞行
He took leave of his colleagues and left the office for the last time.
他向同事们告别，最后一次离开了办公室。
Choose the next layer that will help you use leaves with more confidence.
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Dictionary facts from ECDICT, WIKTIONARY.