从句逻辑流 · 名从 & 状从

模块一：名词性从句

底层逻辑：把一个句子当成 名词 用（充当主/宾/表/同位语）[cite: 245, 246, 247, 248, 249, 250]
▶ Step 1: 扫描环境
触发条件：选项含 wh... (≥2个)，且空前是 动词 / 动词+介词 / be动词 / 抽象名词 / 句首。[cite: 258, 259, 260]
▶ Step 2: 匹配固搭 (秒杀区)
that
▪ 空前是抽象名词: news, fact, idea, suggestion, message, hope, evidence, reason 等 [cite: 263, 264, 265]
(注: 此为同位语从句，对名词解释说明 [cite: 267])
▪ 固定句型: [cite: 268]
- It is said / reported / believed that [cite: 269]
- It is clear / obvious / apparent that [cite: 270]
- There is no doubt that (毫无疑问) [cite: 272]
- The reason (why...) is that [cite: 273, 274, 275]
whether
▪ 空后有: or (not) [cite: 276, 277]
▪ 固定句型: There is some doubt / uncertain whether (怀疑是否) [cite: 279, 280, 281]
▶ Step 3: 拆包分析 (无固搭)
从句状态 连接词 [cite: 283, 284, 285]
不完整 (缺主/宾/表)[cite: 286] 指人: who(主), whoever, whom(宾), whomever [cite: 287, 291]
指物: what, whatever, which, whichever [cite: 288, 292]
完整[cite: 290] when, where, why, how, whether/if(是否), that(无词义) [cite: 293, 294]

🚨 名从铁律

模块二：状语从句 (独秀一枝)

底层逻辑：用一个句子做 状语，通常修饰主句或动词。[cite: 305, 306, 309, 310]
▶ 核心流：找连词 & 固搭
时间
▪ no sooner ... than / hardly ... when (刚...就) [cite: 315]
▪ not ... until (直到...才) [cite: 316]
让步
▪ adj/adv/n + as/though + 主 + 谓 (虽然 - 倒装结构) [cite: 317]
▪ however + adj/adv + 主 + 谓 (无论) [cite: 318]
▪ whatever + (n) + 主 + 谓 (无论) [cite: 319]
结果
▪ so / such ... that (如此...以至于) [cite: 322]

注：状语从句若无固定搭配，核心解法依靠 翻译句意 匹配连词 (如 unless, as long as 等)。[cite: 311, 312, 323]