■on schedule 按照预定时间，及时，准时

The train arrived on schedule. 火车按时到达。

The alarm woke him on schedule. 闹钟准时把他闹醒。

■on shore 在岸上，在陆上

Passengers can speak to their friends on shore through wireless telephone. 乘客可以通过无线电话和岸上的朋友讲话。

When the ship arrived at the port, some sailors went on shore. 船到港口后，有些水手上岸去了。

■on show 在展出；在陈列

Scores of imported cars are on show here. 几十辆进口车正在这里展出。

The collection is on show at the British Museum. 那批收藏品目前在大英博物馆展出。

■on strike 在罢工（罢课、罢市）

The students are out on strike. 学生举行罢课。

The workers have been on strike for two weeks now. 工人已经罢工两星期。

■on time 准时

The trains run on time. 火车很准时。

We have to arrive on time at the doctor’s office. 我们得准时到达医生的办公室。

■on tiptoe 踮着脚；盼望

They stood on tiptoe to get a better look at the parade. 他们踮起脚以便把游行场面看得更清楚些。

The children were on tiptoe for vacation to begin. 孩子们急切地盼望假期开始。

【注】其中的tiptoe有时可用复数，且此时可以有物主代词修饰。如：

We crept around on (our) tiptoes so as not to disturb him. 为了不打扰他，我们蹑手蹑脚地走过去。

■on top 在上边；处于优势

The green book is at the bottom of the pile and the red one is on top. 绿皮的书在那一摞的底下，红皮的在上边。

Lendl was on top throughout the match. 伦德尔在比赛中始终占优势。

■on trial 在试用；在受审

The clerk was employed on trial. 那个职员是试用的。

Take the machine on trial for a week. 把这机器试验一星期。

He was on trial for murder. 他因谋杀罪而受审。

■on vacation 在休假

She plans to go on vacation for most of August. 她打算利用8月的大部分时间度假。

They have gone to France on vacation. 他们到法国去度假了。

■on view 供人观看；陈列着

The exhibition is on view until September. 展览将办到9月。

The latest summer fashions are now on view in the big shops. 最新的夏装款式目前正在各大商店中展出。

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