2022年6月英语六级第2套真题句子解析： It was not until the 1940s that the concept of the "environment" embracing all living and nonliving things developed.

It was not until the 1940s that the concept of the "environment" embracing all living and nonliving things developed.

强调句的基本结构是 "It is/was + 被强调部分 + that + 其他成分"。判断方法是去掉 "It was...that" 框架后，剩余部分 "not until the 1940s the concept of the 'environment' embracing all living and nonliving things developed" 可还原为完整句子 "The concept of the 'environment' embracing all living and nonliving things did not develop until the 1940s"。此句强调的是时间状语 "not until the 1940s"，属于 "It was not until...that..." 这一典型的强调句变体，用于强调某事直到某时才发生。

embracing all living and nonliving things

现在分词 "embracing" 及其宾语 "all living and nonliving things" 构成现在分词短语，后置修饰名词 "the concept of the 'environment'"。这里 "embracing" 不是谓语动词的进行时态（句子真正的谓语是 "developed"），而是作为非谓语动词充当定语，表示主动关系，说明 "环境" 这一概念包含/涵盖所有生物和非生物。现在分词作后置定语是其典型用法之一。

It was not until the 1940sthat the concept of the "environment" embracing all living and nonliving things developed

"It was not until ... that ..." 是强调句的特殊变体,专门用于强调时间状语,表达「直到…才…」的含义。

结构拆解："It was not until [时间成分] that [主句]"。本句中 "the 1940s" 是被强调的时间点短语(名词性结构),"that" 后的 "the concept ... developed" 是主句。

语义理解：这个句型强调主句动作发生的时间节点。本句意为「直到 20 世纪 40 年代,包含所有生物和非生物的"环境"概念才得以发展」,突出概念发展的时间晚。

还原验证：可还原为普通 not...until 句型："The concept of the "environment" embracing all living and nonliving things did not develop until the 1940s." 强调句型将时间状语前置并用 it is/was...that 框架突出。

识别要点：看到 "It was not until" 开头,立即寻找对应的 "that" 引导的主句,中间部分即为被强调的时间成分。注意 "that" 后的主句通常用肯定形式(因否定已在 not until 中体现)。

常见陷阱：不要误认为这是形式主语句型,"that" 在此不是引导主语从句,而是强调句的标记词;去掉强调框架后可还原为完整句子是判断依据。