關于、基礎、靠、著論
    例: This afternoon we are going to listen to a report on the international situation.
     今天下午我們要聽關于國際形勢的報告。
     Professor Shen will give us a talk on traveling in America.
     申教授將給我們做關于美國之行的報告。
     You are wrong on all these issues. 在這些問題上你的看法都錯了。
     The belief is based on practical experience. 這種信念是以實際經(jīng)驗為基礎的。
     Theory must be based on practice. 理論必須以實踐為基礎。
     The people in the south live on rice. 南方人主食大米。(靠)
     The citizens live on their salaries. 城市人靠薪金生活。
     You can't afford luxuries, on an income of 100 yuan a month．
     靠月薪100 元的收入，你是買不起奢侈品的。
     Her pet dogs were fed on the choicest food． 她用精飼料喂養(yǎng)她心愛的狗。
     He is just a scrounger, who lives on other people. 他正是一個小偷，?？繐p害別人過日子。
     Keep the kettle on the boil (=boiling). 讓水壺的水一直開著。
     The enemy are on the run (=running). 敵人在逃跑。
     On 后接 the 加上一個作名詞的動詞．其意義與現(xiàn)在分詞所表達的相近。類似例子很多如：
     on the march 在行軍中，on the mend 在好轉中，on the prowl 徘徊，on the move 活動中，on the scrounge 巧取豪奪(俚語)，on the go 活躍，忙碌，on the lookout 注意, 警戒，on the watch 監(jiān)視著。on the hop 趁不備抓住某人等等。
     on the People's Democratic Dictatorship <<實踐論>>和<<矛盾論>>
     on the People's Democratic Dictatorship <<論人民民主專政>>
     “on Coalition Government”<<論聯(lián)合政府>>
    著、罷、出售、偷、公、假，故意、支付，相反、準
     注：口訣中的“著”是指著火，“罷”指罷工，“偷”指偷偷地，“公”指出差、辦公事；“假”指休假，“準”指準時。
    例：The house next to mine was on fire. 我鄰居的房子著火了。
     The workers of the railway station were on strike. 鐵路工人罷工了。
     Grapes and big water melons from Sinkiang are on sale on a large sale.
     新疆葡萄和西瓜大量上市了。
     Do something on the sly (quiet). 秘密地(暗地里，偷偷地)做某事。
     I've come here on business. 我是有公事來的。
     They went to Bern on a mission. 他們到伯爾尼去執(zhí)行一項使命。
     They have been away on a long trip. 他們出去做一次長途旅行。
     I'll go home on leave next month. 下月我將休假回家。
     I went on business to Shanghai. I did not take leave. 我是公出去上海的，不是不告而別。
     She came to see you on purpose. 她是專程來看你的。
     He came here on purpose to discuss it with you. 他到這來是要與你討論這件事的。
     “This lunch is on me.”“這頓午飯我付錢?！?BR>     “No. let's go Dutch.”“不，還是各付各的。”
     On the contrary, it was very easy to understand. 相反，這事兒很容易理解。
     P1ease come on time. (on schedule). 請準時來。
     注：in time 是“及時”的意思。
     The train arrived on schedule. 火車準時到達。
    特定時間和“一……就”，左右 on 后動名詞
    例：Gases expand on heating and contract on cooling. 氣體加熱時膨脹，冷卻時收縮。(特定時間)
     On entering the room, he found his friends dancing in high spirits.
     一進屋，他就發(fā)現(xiàn)他的朋友們在愉快地跳舞。
     On reaching the city he called up Lao Yang. 一到城里他就給老楊打了一個電話。
     I'll write to him on hearing from you. 我接到你的來信就給他寫信。(一……就)
     以及 on the left, right 向左向右，on the stair 在臺階上等。
    步行、驢、馬、玩笑 on，cab，carriage 用 in
    例：On foot 步行; on horse 騎馬; on donkey 騎驢。
     He rode on, blood flowing from his side. 他騎著馬，鮮血從腰部流下來。
     The soldier of the Eighth Route Army rode 100 li on a horse a day in order to catch up with his unit. 為趕上部隊，那位八路軍戰(zhàn)士騎馬日行百里。
     Go on horse back! 騎馬去！
     You are having me on! 你和我開玩笑呢!
     in cab 和 in carriage 不能用 on 或 by cab 或 carriage。
    at 山腳、門口在當前，速、溫、日落價核心
     即在山腳下、在門口、在目前，速度、以……速率、溫度、在日落時、在……核心要用at。
    例：At the foot of the mountain, there are thirty of our comrades.
     在山腳下，有我們30 個同志。
     There is a beautiful lake at the foot of the hill. 山腳下有一個美麗的湖。
     At the gate of the house there are many children playing glass ball.
     門口有一大群孩子在玩玻璃球。
     Who's standing there at the door? 誰站在門口?
     I don't need the dictionary at present. 我現(xiàn)在還不需要這本詞典。
     He is at present in Washington. 他目前正在華盛頓。
     The train runs at fifty kilometres an hour. 火車每小時行駛50 公里。
     We built the plant at top speed and minimum cost.
     我們以最低的投資，的速度修建了該工廠。
     at home 在國內，在家里
     at ten degrees centigrade 在攝氏10 度
     at minus ten degrees centigrade 攝氏零下10 度
     Water freezes at 0°centigrade. 水在攝氏零度結冰。
     Water usually boils at 100°. 水通常在攝氏100 度沸騰。
     at zero 在零度
     at the rate of 45 miles an hour
     at full speed 全速
     at a good price 高價
     at a low cost 低成本
     at a great cost 花了很大代價
     at that time 在當時
     Evaporation takes place at all temperatures. 蒸發(fā)在任何溫度下都能發(fā)生。
     at 1000 RPM (revolution per minute) 每分鐘1000 轉
     at a high speed 高速
     The soldiers launched an attack upon the enemy at sunset.
     戰(zhàn)士們在日落時對敵人發(fā)起了攻擊。
     at daybreak 日出時
     The force at the core leading our cause forward is the Chinese Communist Party.
     領導我們事業(yè)的核心力量是中國共產(chǎn)黨。
     The atom has a nucleus at its core. 在原子的中心有一個原子核。
     At the beginning of this term the teacher in charge of our class was very strict with us. 這學期開始，我們的班主任老師對我們要求非常嚴格。
     以及 At the first session of the First National People's congress of the People's Republic of China. 在中華人民共和國第一次全國人民代表大會第一次會議上.
    常用的 at 短語有:
     at first 首先，開始時
     at least 至少
     at all events 無論如何
     at home 在家，無拘束
     at one stroke 一下子
     at a loss 不知怎辦
     at any rate 不管怎樣
     at length 詳細地
     be at high tide 處于高潮期
     at our invitation 應我們的邀請
     at our request 應我們的請求
     at the news 聽到這消息
     at the risk of 冒……危險
     at a great expense 以巨大費用
     at a stroke 一舉
     at intervals of 每隔
     at liberty 有權，隨意
     at the sight of 一見到
     at the point of 接近，靠近
     at the thought of 一想到
     at the speed of 以……速度
     at the cost (price) of 以……為代價
     at leisure 閑著、失業(yè)
     at the disposal of 任憑……使用
     at stake 在危險中、在成敗關頭
     at bottom 實際上、本質上
     at short notice 一得到通知
     at seeing us 看到我們
     at the happy tidings 聽到喜訊
     at sixteen 在16歲時
     at the present stage 在現(xiàn)階段
     at the weekend 周末
     at all times 永遠
     at 405 Victory Road 在勝利路405號