on与at有什么区别？

at小

at后面跟着小时间或者小地点。小时间和小地点也有口诀，分别是“午夜点与分”。例子，at noon, at night, at half past six。

on具体

on具体就是指具体时间。比如明确到几年几月几日，翻译中有“的”。例子：on June the first, on 。

表示时间的区别：

at指时间表示：

1. 时间的一点，一时刻：

They come home at surprise (at noon, at midnight, at ten o’clock, at daybreak, at dawn).

他们出其不意地回家（中午、午夜、十点钟、黎明）。

2. 较短的一段时间。可指某个节日或认为一年中标志大事的日子。

His grandfather died at seventy-two.

他祖父七十二岁去世。

At the beginning (middle, end) of that month he was sick.

那个月初（中、末）他病了。

He went home at Christmas (at New Year, at the spring Festival, at night, at midsummer).

他在圣诞节回家（新年，春节，晚上，仲夏）。

on指时间表示：

1. 具体的时日和一个特定的时间，如某日，某节日，星期几等。

He will come to meet us on our arrival.

我们一到他就来接我们。

On May 4th (On Sunday, On New Year’s day, On Christmas Day), there will be a celebration.

5月4日（星期天，元旦，圣诞节），会有庆祝活动。

2. 在某个特定的早晨，下午或晚上。

He arrived at 10 o’clock on the night of the 5th.

他是5日晚上10点到的。

He died on the eve of victory.

他在胜利前夕去世了。

3. 准时，按时。

If the rain should be on time, I should reach home before dark.

如果下雨的话，我应该在天黑之前到家。

on 表示时间

on a certain day, on a sudden(突然), on a winter morning,

on Christmas Day, on night shift, on one's birthday,

on schedule(按时), on Sunday, on that date, on the eve of,

on the following day, on the instant(马上),

on the moment(立刻), on the Monday morning,

on the New Year's Eve, on the next morning,

on the point of(正在…时候), on the spur of the moment(立刻) on this day, on this occasion, on time

at 表示时间

at a time(在某时), at a wedding(婚礼), at all times(一直),

at any moment, at any time, at Christmas, at dark (天黑时),

at dawn(在黎明), at daybreak, at dinner-time, at dusk(在黄昏), at Easter, at first sight,(一见到), at first, at last, at midnight,

at night, at nightfall, at noon, at present, at six clock,

at sunrise, at sunset, at that moment, at that time,

at the age of, at the beginning of , at the correct time,

at the end of, at the last minute, at the moment,

at the present stage at the same time, at the stage(眼下)

at the start, at the time being, at the time of, at the very start, at this point(此时), at this season, at this time of day,

at times(有时）

on 表示状态

on a diet(在节食), on a picnic, on a trip, on a vacation trip,

on a visit, on a voyage, on a walk, on approval,

on bended knees(跪着) on business, on call (待命)

on credit(赊帐), on display, on drill(在训练), on duty,

on exhibition, on fire, on foot, on good terms(友好),

on guard, on hire(出租) on holiday, on leave, on loan(出借),

on offer(出售中), on one's day(在最兴旺的日子),

on one's guard(警惕) on one's honeymoon,

on one's knees, on one's mind(惦念),

on one's own time(在非工作时间), on one's round(出诊)

on order(已订购), on parade(在游行), on patrol(巡逻)

on sale(待售) on sale, on show, on stream(在生产中)

on the air(在广播), on the alert(提防), on the ebb(在退潮),

on the feed(在进食), on the fly(在飞行中),

on the increase/decrease(在增长/下降中), on the job(工作着) on the listen(在注意听), on the lurk(暗中行动),

on the march(行军中), on the move(在活动中)

on the phone(在打电话) on the quiet(秘密地)

on the rise(在上涨), on the run(跑这),

on the spot(在危险中，当场), on the strike,

on the turn(在转变中) on the watch(守侯着),

on the way(在途中), on the way, on tour, on trial, on vacation, on view(展览着), on watch(值班)

at 表示状态

at a disadvantage(处不利地位), at a lecture, at a run(跑着),

at breakfast, at call(随叫随到), at church, at dinner, at ease(悠闲自得), at feed, at gaze, at grass， at graze,(在吃草)

at hand(在手边), at high/low(处于高潮/低潮中),

at issue(在争论中), at large(未被捕), at leisure (空闲着),

at meals, at peace, at play, at rest, at school,

at stake(处在危险中), at study, at table(在吃饭),

at the bar(受到公开审问), at the meeting, at the piano,

at the wheel(在驾车), at war, at work