A04
core
Scene core
Participant roles
Theme / What We Say Something About
What is the statement about?
basic
Subject
Topic
Theme
含义
The participant or idea that the sentence is mainly about, even if it is not actively doing anything.
如何识别
Ask what the sentence is making a statement about.
示例
单词
the book|this problem|my brother|it
短语
as for the book|this problem is difficult
句子
This book is expensive.
Visual guide
Basic shape
ABOUT frame:
[This book]
↓ comment about it
[is expensive]
Topic/theme = what
statement is about
Compare shape
Same idea, two shapes: [This book] [is expensive] subject/topic comment [As for the book], [expensive] topic frame + comment
语言视角
用母语深入讲解
中文
显性程度
strong
重要程度
Mandarin is strongly topic-prominent: the first element is often what the sentence is about, not necessarily the grammatical actor.
这本书，我很喜欢。
zhè běn shū, wǒ hěn xǐhuān = this book, I really like
在所学语言中
英语
显性程度
medium
学习难度
英语可以把话题提前形成“话题 + 评论”的表达，但更常见、更自然的基本语序是主语-动词-宾语。
This book, I really enjoyed.
This book = 话题（句子主要谈这本书）
常见易错点
学习者可能照搬母语中大量话题前置的结构，写出不自然的英语词序。
Same block, different coding
Both languages use this block strongly, but they signal it differently. Focus on form changes, not only meaning.