In the sentence 'They live in the country', the plural form of the verb 'live' is in agreement with the plural subject 'they'.

在They live in the country一句中，动词复数形式live与复数主语they一致。

《牛津词典》

The form and style are very familiar, and best of all, you are the world-class expert on the subject of YOU.

你对形式和风格非常熟悉，最重要的是，你是 YOU 这个领域的世界级专家。

youdao

Freedom of expression should not be subject to any form of political pressure.

言论自由不应受制于任何形式的政治压力。

youdao

And so it seemed a natural move for early Christian writers to use this existing pastoral form when they wanted to speak on subject of priests or ministers or affairs of the church.

于是用现存的田园诗来谈论,关于牧师或教堂事务的话题,成了早期基督派作家非常自然的转变。

耶鲁公开课 - 弥尔顿课程节选

Very frequently, as is the case in Gadamer, this meaning is called "the subject matter": that is to say, what--in thinking about literature in terms of form and content, let's say--we'd call "content."

高达美，又把这一含义称为主题：,当我们研究文学的,形式和内容方面时，主题即内容“

耶鲁公开课 - 文学理论导论课程节选

Although the interim guidance is now in force, its final form is subject to a consultation that runs until 13 March 2013.

BBC: Prosecutors clarify offensive online posts law

Indeed, if the book has failings, they reflect the author's relatively uncritical attitude towards the powerful and sophisticated Americans who form his subject matter.

ECONOMIST: Washington chronicle

To be classified as having a preference for a particular form of alcohol, a subject had to report that he drank more than half of his alcohol in this form.

ECONOMIST: Alcohol and health