作为语文老师，对于“认真听课英语怎么说”这个词，我可以从以下五个方面对其进行详细的说明。

1. 对“认真”的翻译：英语中可以使用attentive、serious、concentrated等词汇来表达“认真”的意思。

- He is an attentive student who always pays close attention to the teacher in class.（他是个认真的学生，总是在课堂上专心听讲。）

- She takes her studies very seriously and spends hours every day studying English.（她非常认真地学习，每天都花好几个小时学英语。）

- The students were all concentrated on the lecture, with their eyes fixed on the teacher.（学生们都很专注听讲，目光紧盯着老师。）

2. 对“听课”的翻译：英语中可以使用attend class、listen to lectures、partite in courses等词汇来表达“听课”的意思。

- It is important to attend class regularly if you want to succeed in college.（如果你想在大学里获得成功，定期上课非常重要。）

- She always listens to lectures carefully and takes detailed notes to review later.（她总是认真听讲并做详细的笔记以便后期复习。）

- The students actively partite in courses and ask questions when they don't understand something.（学生们积极参与课程，遇到不懂的问题就提问。）

3. 对“怎么说”的翻译：英语中可以使用how to say、what's the word for、what's the equivalent等词汇来表达“怎么说”的意思。

- How do you say "认真听课" in English?（"认真听课"英语怎么说？）

- What's the word for "认真听课" in English?（"认真听课"的英语单词是什么？）

- What's the equivalent of "认真听课" in English?（"认真听课"的英语对应词汇是什么？）

4. 对“认真听课”的翻译：英语中可以使用actively listen to class、listen attentively in class、actively partite in lectures等词汇来表达“认真听课”的意思。

- It's important to actively listen to class and take notes in order to improve your academic performance.（积极听课并做笔记是提高学业成绩的重要方式。）

- The students always listen attentively in class and ask questions when they need clarification.（学生们总是认真听课并在需要澄清时提问。）

- Active partition in lectures is essential for a thorough understanding of the subject matter.（积极参与讲座对深入理解主题非常重要。）

5. 对“认真听课”的实际应用：在实际使用中，我们可以将“认真听课”用作一个谓语动词短语来描述一个人的听课态度和行为。

- She always pays attention in class and actively partites in discussions. She is really good at "认真听课".（她总是专注听课，并积极参与讨论。她真的很擅长“认真听课”。）

- He is a diligent student who takes his studies seriously and always "认真听课".（他是一个勤奋的学生，他非常认真地学习，总是“认真听课”。）

- The teacher praised him for his excellent performance and his habit of "认真听课".（老师赞扬他出色的表现和他“认真听课”的习惯。）