但 last night 昨夜;in the evening 在晚上; on time 准时，in time 及时，等则不同。

　　年月日，加早午晚，of 之前 on 代 in

　　例：on the morning of 18th 18日早晨

　　on the evening of 4th 4日晚上

　　On the eve of their departure they gave a farewell banquet and their head gave a farewell speech. 他们在临行前夕举行了一次告别宴会，他们的团长发表了告别讲话。

　　收音、农场，值日 on

　　例：Did your supervisor like the story over (or on) the radio last night?

　　您的导师喜欢昨天从收音机里听到的故事吗?

　　I heard the news over (or on) the radio. 我从收音机里听到了这一条消息。

　　talk over the radio 由无线电播音

　　on TV 从电视里……

　　hear something on the wireless 在无线电里听到

　　My brother works on an Army reclamation farm. 我哥哥在一个军垦农场工作。

　　The students are working on a school farm. 学生们正在校办农场劳动。

　　This is a farmer's house on a farm. 这是农场的农舍。

　　Who is on duty, today? 今天谁值日?

　　We go on duty at 8 a.m. 我们上午8点钟上班。

　　关于、基础、靠、著论

　　例: This afternoon we are going to listen to a report on the international situation.

　　今天下午我们要听关于国际形势的报告。

　　Professor Shen will give us a talk on traveling in America.

　　申教授将给我们做关于美国之行的报告。

　　You are wrong on all these issues. 在这些问题上你的看法都错了。

　　The belief is based on practical experience. 这种信念是以实际经验为基础的。

　　Theory must be based on practice. 理论必须以实践为基础。

　　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，你是买不起奢侈品的。

　　Her pet dogs were fed on the choicest food. 她用精饲料喂养她心爱的狗。

　　He is just a scrounger, who lives on other people. 他正是一个乞丐，专靠损害别人过日子。

　　Keep the kettle on the boil (=boiling). 让水壶的水一直开着。

　　The enemy are on the run (=running). 敌人在逃跑。

　　On 后接 the 加上一个作名词的动词.其意义与现在分词所表达的相近。类似例子很多如：

　　on the march 在行军中，on the mend 在好转中，on the prowl 徘徊，on the move 活动中，on the scrounge 巧取豪夺(俚语)，on the go 活跃，忙碌，on the lookout 注意, 警戒，on the watch 监视着。on the hop 趁不备抓住某人等等。

　　on the People's Democratic Dictatorship 《实践论》和《矛盾论》

　　on the People's Democratic Dictatorship 《论人民民主专政》

　　“on Coalition Government”《论联合政府》

　　着、罢、出售、偷、公、假，故意、支付，相反、准

　　注：口诀中的“着”是指着火，“罢”指罢工，“偷”指偷偷地，“公”指出差、办公事;“假”指休假，“准”指准时。

　　例：The house next to mine was on fire. 我邻居的房子着火了。

　　The workers of the railway station were on strike. 铁路工人罢工了。

　　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. 我是有公事来的。

　　They went to Bern on a mission. 他们到伯尔尼去执行一项使命。

　　They have been away on a long trip. 他们出去做一次长途旅行。

　　I'll go home on leave next month. 下月我将休假回家。

　　I went on business to Shanghai. I did not take leave. 我是公出去上海的，不是不告而别。

　　She came to see you on purpose. 她是专程来看你的。

　　He came here on purpose to discuss it with you. 他到这来是要与你讨论这件事的。

　　“This lunch is on me.”“这顿午饭我付钱。”

　　“No. let's go Dutch.”“不，还是各付各的。”

　　On the contrary, it was very easy to understand. 相反，这事儿很容易理解。

　　P1ease come on time. (on schedule). 请准时来。