关于、基础、靠、著论
例： This afternoon we are going to listen to a report on the international situation. 今天下午大家要听关于国际形势的报告。
Professor Shen will give us a talk on travelling in America. 申教授将给大家做关于美国之行的报告。
You are wrong on all these issues. 在这类问题上你的怎么看都错了。
The belief is based on practical experience. 这种信念是以实质经验为基础的。
Theory must be based on practice. 理论需要以实践为基础。
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 cant 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. 他正是一个小偷，专靠损害其他人过日子。
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。其意义与目前分词所表达的相近。类似例子不少如：
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（埋语），on the go活跃，忙碌，on the lookout1注意， 警戒，on the watch监视着。on the hop2趁不备抓住某人等等。
on the Peoples Democratic Dictatorship《实践论》和《矛盾论》
on the Peoples Democratic Dictatorship《论人民民主专政》
on Coalition3 Government 《论联合政府》
着、罢、供应、偷、公、假，故意、支付，相反、准
注：口诀中的着是指失火，罢指罢工，偷指偷偷地，公指出差、办公事；假指休假，准指按时。
例：The house next to mine was on fire. 我邻居的房屋失火了。
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 sly4 （quiet）。秘密地（暗地里，偷偷地）做某事。
Ive come here on business. 我是有公事来的。
They went to Bern on a mission. 他们到伯尔尼去实行一项使命。
They has been away on a long trip. 他们出去做一次长途旅游。
Ill 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，不是不告面别。
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.
No. lets go Dutch.
这顿午饭我付钱。
不，还是各付各的。
On the contrary， it was very easy to understand. 相反，这事儿比较容易理解。
P1ease come on time. （on schedule）。请按时来。
注：in time是准时的意思。
The train arrived on schedule. 火车按时到达。
特定时间和一就，左右on后动名词
例：Gases expand on heating and contract on cooling. 气体加热时膨胀，冷却时缩短。（特定时间）
On entering the room， he found his friends dancing in high spirits. 一进屋，他就发现他的朋友们在愉快地跳舞。
On reaching the city he called up Lao Yang. 一到城里他就给老杨打了一个电话。
Ill write to him on hearing from you. 我接到你的来信就给他写信。（一就）
