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》

　　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 has 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。