网友是否还记得这些词组：go on a trip（去旅行），go on a holiday（去度假），go on an outing（去郊游），go on a diet（节食）？

在这些词组中，go on 表示“从事于；进行”（go 是不及物动词，on 是介词），后面接的是一些“日常活动”，如果指“一次活动”就用单数，如果指“多次活动”，就用复数。

网友这句话的意思：

We often went on class outings together.

我们经常一起全班去郊游。

在英语中，“go on a +单数名词”的用法十分常见。原来，这个英语的一个习语，意为从事某种活动。常见的搭配如下（有时冠词可省略，需要复数加s）：

1. go on a holiday

I'd love to go on a holiday but I can't afford the time.我倒想去度假,可是抽不出时间来。

I went on a holiday to China last week.上周我休假去中国旅行。

What fun it will be when we all go on holiday together.  我们大家一起去度假那可太有意思了。

If you save some money each week, we can go on holiday. 要是你每星期能存点儿钱，咱们就可以外出度假了。

2. go on a trip

As the day was fine, they decided to go on a trip.由于天气好,他们决定作一次短途旅行

We went on a trip to the mountains.我们到山里去旅游了。

She told me that she would go on trip to Europe the next day.她告诉我,她第二天要去欧洲旅行。

Twenty students of our class, including two American students, went on trip.我班二十个学生，包括二位美国学生，去旅行了。

3. go on a tour

We are going on a tour of the city this afternoon.我们今天下午要到城里去观光。

He went on a tour round the world.他周游了世界。

Do you see about all the necessary things to go on tour?你们负责旅行中所有的事情吗？

The band has gone on tour to promote their new album.这个乐队已开始巡回宣传他们的新唱片。

4. go on a vacation

He never goes on a vacation but he takes his pet dog. 他每次度假都会带他的狗去。

He mopped up the rest of his business and went on a vacation.他办完了剩余的事情就去度假了。

Where would you like to go on vacation, Sam?萨姆,你想到哪里去度假?

I'm looking for someone I can go on vacation with.我在找一个能和我一起去度假的人。

5. go on a diet

The doctor says I've got to go on a diet. 医生说我得节食。

He is on a diet to reduce some weight. 他正在节食以减轻体重。

More and more people, especially females, are to go on diet.越来越多的人, 特别是女生, 开始节制饮食。

You don't need to go on diet. But you can't overeat and should eat limitedly.你不必节食，但要饮食有度，不能吃得过饱。

6. go on a strike

The workers go on strike to ask for higher pay.为了提高工资，工人们举行了罢工。

Over a thousand factory employees went on strike.上千工厂的工人罢工了。

The miners were determined to go on a strike for better working conditions.煤矿工人们决定为争取更好的工作条件举行罢工。

The workers acted out their dissatisfaction with the management by going on a strike.工人们以罢工来表示他们对资方的不满。

7. go on a hike

We took advantage of the fine weather to go on a hike. 我们利用晴朗的天气去旅游。

How would you like to go on a hike with me?和我一起去徒步旅行，怎么样?

8. go on a journey

He made a resolve to go on a journey early in the next morning.他决意明天一早就动身。

He went on a journey when he was 18 years old, never to come back.他十八岁时出外旅行，一直没有回来。

9. go on a voyage

Captain Cook went on a voyage round the world.库克船长做了一次环球航旅行。

How pleasant it is to go on a voyage on the calm sea.在平静的海面上航行多么令人愉快啊!

10. go on an excursion

Weather permitting, we'll go on an excursion to the Western Hills tomorrow.天气要是合适,我们明天将去西山去玩。

I went on an excursion recently,but my trip took me longer than I expected.最近我作作一次短途旅行，但旅途所花费的时间比我预计的要长。

11. go on an expedition

The scientists will go on an expedition to the South Pole.这些科学家们将要去南极考察。

Three of us will go on an expedition and find out.我们三个先去摸摸底，把事情弄清楚。

12. go on an outing

I'll go on an outing with some friends.我与朋友去郊游。

We went on an outing to the seaside.我们去海边旅行。

13. go on an errand

My mother asked me to go on an errand; she wanted me to buy some food.我妈妈叫我跑一下腿，她想让我去买点食物。

I want you to go on an errand for me.俺要你去给俺送个信儿。

8. go on a picnic

We will play sports or go on a picnic.我们将做户外运动或去野餐。

They refused to go on a picnic on such a dirty day.他们拒绝在这种恶劣的天气去野餐。

此外，go on business中，business是不可数名词，之前不加任何冠词。例如：

I will go on business either this week or next week. 我将在这星期或下星期出差。

John placed aside his writing for a month while he went on business.出差期间，约翰一个月没写东西。