“Preface sth by sth”是什么意思？
“Preface sth by sth” 意思是以引言或某种行动开始某事，为接下来的内容做准备。
介绍
短语动词“Preface sth by sth”在口语和书面英语中都很常用，用来描述用一段开场白或解释来引入主要事件、演讲或文本的行为。理解“Preface sth by sth”的含义有助于学习者更清晰、更正式地表达。例如，演讲者可能会以感谢听众的话来开场，或者一本书可能会以作者的序言作为开头。这个短语有助于表达一件事在另一件事之前发生并起到铺垫作用。
快速信息框
- 短语动词：Preface something by something
- 类型：及物动词
- 水平：B2–C1
- 简短含义：通过先说或先做某事来引入某物
结构（语法规则）
“Preface sth by sth”是一个及物且不可分割的短语动词。你不能将动词和介词分开。
Pattern: Preface + object (something) + by + object (something)- Correct: She prefaced her speech by telling a story. (她以讲述一个故事作为演讲的开场。)
- Incorrect: She prefaced by telling a story her speech. (错误：她以讲故事作为她演讲的开场白。)
如何使用“Preface sth by sth”？
当你想说明某个动作或陈述在另一个动作或陈述之前，用来引入或准备它时，可以使用“Preface sth by sth”。这个短语常用于正式场合，如演讲、报告、书籍或报告中。
关注被介绍的内容（主要内容）以及引入的动作或陈述。
例子
以下是一些展示如何在句子中使用“Preface sth by sth”的例子：
- The professor prefaced his lecture by explaining the course objectives. (教授在讲座开始时先解释了课程目标。)
- She prefaced her email by apologizing for the delay in response. (她在邮件开头先为回复迟缓表示了歉意。)
- The author prefaced the novel by sharing a personal story. (作者在小说开头分享了一个个人故事作为引言。)
- He prefaced his presentation by thanking the organizers for the opportunity. (他在演讲开始时首先感谢了组织者给予的机会。)
- They prefaced the meeting by reviewing last week’s minutes. (他们在会议开始前先回顾了上周的会议记录。)
常见错误
许多学习者在使用这个短语动词时会混淆宾语的顺序或省略介词“by”。
- Incorrect: She prefaced by her speech a joke.
- Correct: She prefaced her speech by telling a joke.
- Incorrect: He prefaced the speech with a story.
- Correct: He prefaced the speech by telling a story.
记住，总是在被引入的对象后使用“by”。
差异 / 同义词
“Preface sth by sth” 类似于 “introduce sth with sth”，但通常暗示正式或书面语境。“Begin sth with sth” 更通用，且不那么正式。
- Preface sth by sth:: 正式介绍，通常是书面或口头的。
- Introduce sth with sth:: 总体介绍，任何背景信息。
- Begin sth with sth:: 简单开始，非正式或正式。
例如，一本书通常以序言开头，但老师可能会用热身活动开始一节课。
常见搭配
使用“Preface sth by sth”时，某些宾语常常出现：
- Speech – a formal talk (演讲——正式的讲话)
- Lecture – an educational talk (讲座——一次教育性的讲演)
- Presentation – showing information to an audience (演示——向观众展示信息)
- Book – a written work (书籍——书面作品)
- Email – electronic message (电子邮件——电子信息)
这些搭配能帮助你在日常交流中自然地使用这个短语动词。
相关短语动词
以下是相关短语动词 preface sth by sth:
现实生活中的对话
这里有一段使用“Preface sth by sth”的简短对话：
Anna: How did the speaker start the conference?
安娜：演讲者是怎样开场这次会议的？
John: He prefaced his talk by thanking the sponsors.
约翰：他在演讲开始时首先感谢了赞助商。
Anna: That sounds polite and professional.
安娜：听起来既礼貌又专业。
练习
Fill in the blank with the correct form of “preface sth by sth”:
She _______ her report _______ a brief summary of the findings.
- a) prefaced / by
- b) prefaced / with
- c) prefaced / to
- d) prefaced / for
常见问题解答
Q1: Can “preface sth by sth” be used in casual conversations?
A1: It is more common in formal or written contexts but can be used in casual speech if appropriate.
Q2: Is “preface” always followed by “by”?
A2: Yes, when using this phrasal verb, “by” introduces the action or statement that comes first.
Q3: Can I say “preface something with something”?
A3: Yes, “preface something with something” is also correct and commonly used.
Q4: What is the difference between “preface” and “introduce”?
A4: “Preface” is more formal and often used in writing, while “introduce” is more general.
Q5: Is “preface” a separable phrasal verb?
A5: No, “preface sth by sth” is inseparable; the verb and preposition stay together.
