（笑話來源：http://www.chenhen.com/html/english/joke/1000-jokes.htm）
The writer wrote this story mainly in present tense to make it vivid. Below most of the verbs which follow third person singular subjects, therefore, are ended with "s" .

Three engineers and three accountants are traveling by train to a conference. At the station, the three accountants each buy tickets and watch as the⁽¹⁾ three engineers buy only a single ticket.

    "How are three people going to travel on only one ticket?" asks an accountant.

    "Watch and you'll see," answers an engineer⁽²⁾.

    They all board the train. The accountants take their respective seats but all three engineers cram into⁽³⁾ a restroom and close the door behind them. Shortly after the train has departed⁽⁴⁾, the conductor comes around collecting tickets. He knocks on the restroom door and says, "Ticket, please."

    The door opens just a crack and a single arm emerges with a ticket in hand. The conductor takes it and moves on.

    The accountants saw⁽⁵⁾ this and agreed it was quite a clever idea. So after the conference, the accountants decide to copy the engineers on the return trip and save some money (being clever with money, and all that). When they get to the station, they buy a single ticket for the return trip. To their astonishment⁽⁶⁾, the engineers don't buy a ticket at all.

    "How are you going to travel without a ticket?" says one perplexed⁽⁷⁾ accountant.

    "Watch and you'll see," answers an engineer.

    When they board the train the three accountants cram into a restroom and the three engineers cram into another one nearby. The train departs. Shortly afterward, one of the engineers leaves his restroom and walks over to the restroom where⁽⁸⁾ the accountants are hiding. He knocks on the door and says, Ticket, please."

(1) At the beginning of the article, we needn't add "the" in front of "three engineers" while here "the" is necessary as these three engineers are definite。

(2) "answers an engineer " and "an engineer answers" presents the same idea; however, it is said that the order of "pronoun + verb (with meaning of speaking)" is not proper, for example, answers he.

(3) Cram into: to push or force sb/sth into a small space. For example, I saw a boy cram a book into his pants.

(4) Adverb of place is often placed either at the start or at the end of a sentence, and sometimes in the middle as well (e.g., The conductor, shortly after the train has departed, comes around collecting tickets).

(5) Past tense was employed because the writer emphasized that only after seeing what had happened did they learn how to save money. But, to keep consistence, present tense may be a better choice.

(6) "To someone's ..." is a common pattern to show people's surprise or shock. Example: To people's surprise, the winner rejected to accept the trophy.

(7) Perplexed: confused and anxious because you are unable to understand sth. For instance, some readers were perplexed at Gary's works.

(8) "in which" can be an alternative replacement of "where". Example: John entered a hut in which/where a smelly cat was sitting atop a box.