第43课 Over the South Pole 飞越南极——深度语法分析
课号：第43课（共96课）
标题：Over the South Pole（飞越南极）
核心语法重点：条件状语从句、情态动词+完成式、定语从句
难度等级：★★★☆☆（四级进阶）
课文原文
In 1929, three years after his flight over the North Pole, the American explorer, R. E. Byrd, successfully flew over the South Pole for the first time. Though, at first, Byrd and his men were able to take a great many photographs of the mountains that lay below, they soon ran into serious trouble. At one point, it seemed certain that their plane would crash. It could only get over the mountains if it rose to 10,000 feet. Byrd at once ordered his men to throw out two heavy food sacks. The plane was then able to rise and it cleared the mountains by 400 feet. Byrd now knew that he would be able to reach the South Pole which was 300 miles away, for there were no more mountains in sight. The aircraft was able to fly over the endless white plains without difficulty.
一、词法分析 (Morphology)
1.1 核心词汇词类标注
| 词汇 | 音标 | 词性 | 本课含义 | 词形变化 |
|---|---|---|---|---|
| explorer | /ɪkˈsplɔːrə(r)/ | n. | 探险家 | explorers (复数) |
| successfully | /səkˈsesfəli/ | adv. | 成功地 | success (n.) → successful (adj.) → successfully (adv.) |
| photograph | /ˈfəʊtəɡrɑːf/ | n. | 照片 | photographs (复数) |
| mountain | /ˈmaʊntən/ | n. | 山脉；山 | mountains (复数) |
| trouble | /ˈtrʌbl/ | n. | 麻烦；困境 | in trouble (搭配) |
| certain | /ˈsɜːtn/ | adj. | 确定的；必然的 | certainly (adv.) |
| crash | /kræʃ/ | v./n. | 坠毁；碰撞 | crashes, crashed, crashing |
| rise | /raɪz/ | v. | 上升 | rose (过去式), risen (过去分词) |
| sack | /sæk/ | n. | 麻袋；大袋 | sacks (复数) |
| aircraft | /ˈeəkrɑːft/ | n. | 飞机；航空器 | 单复数同形 |
| plain | /pleɪn/ | n. | 平原 | plains (复数) |
1.2 词形变化要点
1.2.1 不规则动词变化
rise → rose → risen（上升）
本课例句：
"It could only get over the mountains if it rose to 10,000 feet."
（只有当飞机上升到10,000英尺时，它才能越过那些山脉。）
语法要点：
- rise 为不及物动词，意为"上升、升起"
- 过去式为 rose，非规则变化
- 不可用于被动语态（主语自己上升）
- 与 raise 的区别：raise 是及物动词（raise something）
不规则动词对比：
| 原形 | 过去式 | 过去分词 | 用法 | 本课例句 |
|---|---|---|---|---|
| rise | rose | risen | 不及物，主语自升 | ”it rose to 10,000 feet” |
| raise | raised | raised | 及物，举起某物 | 本课未出现 |
| fly | flew | flown | 不及物/及物 | ”flew over the South Pole” |
| run | ran | run | 不及物 | ”ran into serious trouble” |
| throw | threw | thrown | 及物 | ”throw out two heavy food sacks” |
1.2.2 派生词族
success 词族：
success (n.) 成功
↓
successful (adj.) 成功的
↓
successfully (adv.) 成功地 ← 本课用法
↓
succeed (v.) 成功
本课例句：
“successfully flew over the South Pole for the first time” （首次成功地飞越南极）
构词规律：名词 → 形容词（+ful）→ 副词（+ly）
1.2.3 复合词分析
| 复合词 | 构成 | 词性 | 含义 | 例句 |
|---|---|---|---|---|
| food sack | food + sack | n. | 食物袋 | ”two heavy food sacks” |
| white plains | white + plains | n. | 白色平原 | ”endless white plains” |
二、句法分析 (Syntax)
2.1 全文句型统计
| 句型类别 | 数量 | 占比 | 例句编号 |
|---|---|---|---|
| 简单句 | 2 | 28.6% | S1, S7 |
| 并列句 | 1 | 14.3% | S6 |
| 复合句（含从句） | 4 | 57.1% | S2, S3, S4, S5 |
| 总计 | 7 | 100% | — |
2.2 逐句成分分析
S1: 开篇主题句
In 1929, three years after his flight over the North Pole, the American explorer, R. E. Byrd, successfully flew over the South Pole for the first time.
句子结构：简单句（长主语+修饰成分）
[时间状语]: In 1929
[时间状语]: three years after his flight over the North Pole
[主语]: the American explorer, R. E. Byrd
[同位语]: R. E. Byrd（解释说明explorer是谁）
[状语]: successfully
[谓语]: flew over
[宾语]: the South Pole
[状语]: for the first time（首次）
语法要点：
1. 主语后接同位语R. E. Byrd，进一步说明explorer的身份
2. 两个时间状语：具体年份+相对时间（三年后）
3. flew over 为动词短语，意为"飞越"
4. for the first time 固定短语，表示"首次"
S2: 转折过渡句
Though, at first, Byrd and his men were able to take a great many photographs of the mountains that lay below, they soon ran into serious trouble.
句子结构：主从复合句（含让步状语从句+定语从句）
让步状语从句：
Though │ Byrd and his men │ were able to take │ a great many photographs │ of the mountains │ [that lay below]
连词 │ 主语 │ 谓语 │ 宾语 │ 后置定语 │ 定语从句
定语从句（修饰mountains）：
that │ lay │ below
关系代词(主)│ 谓语│ 状语
主句：
they │ soon ran into │ serious trouble
主语 │ 谓语 │ 宾语
语法要点：
1. Though引导让步状语从句，表示"虽然"
2. at first 插入语，意为"起初、开始时"
3. were able to 情态表达，表示"能够"
4. a great many + 可数名词复数，表示"大量的"
5. that lay below 定语从句修饰mountains，that在从句中作主语
6. ran into trouble 固定搭配，意为"陷入麻烦"
S3: 危机描述句
At one point, it seemed certain that their plane would crash.
句子结构：主从复合句（含主语从句）
主句：
[状语]: At one point（在某一刻、一度）
[形式主语]: it
[系动词]: seemed
[表语]: certain
[真正主语从句]: that their plane would crash
主语从句：
that │ their plane │ would crash
连词 │ 主语 │ 谓语（过去将来时）
语法要点：
1. it seemed certain that... 固定句型，"似乎可以肯定..."
2. it 为形式主语，真正的主语是that从句
3. would crash 过去将来时，表示从过去看将要发生的事
4. at one point 意为"一度、在某一时刻"
S4: 条件限制句
It could only get over the mountains if it rose to 10,000 feet.
句子结构：主从复合句（含条件状语从句）
主句：
[主语]: It（指代plane）
[情态动词+副词]: could only
[谓语]: get over
[宾语]: the mountains
条件状语从句：
if │ it │ rose │ to 10,000 feet
连词│ 主│ 谓(过去式)│ 程度状语
语法要点：
1. if引导条件状语从句，表示"如果、只有当..."
2. could only 表示"只能够"，强调限制条件
3. get over 意为"越过、克服"
4. rose to 表示"上升到"，rise的过去式
5. 这是"情态动词+动词原形"结构表达过去的能力
S5: 决策与结果句
Byrd at once ordered his men to throw out two heavy food sacks.
句子结构：简单句（含复合宾语）
[主语]: Byrd
[状语]: at once（立即）
[谓语]: ordered
[宾语]: his men
[宾语补足语]: to throw out two heavy food sacks（不定式）
语法要点：
1. order sb. to do sth. 结构，命令某人做某事
2. at once 固定短语，意为"立即、马上"
3. throw out 短语动词，意为"扔出去"
4. two heavy food sacks 名词短语，多个形容词前置修饰
S6: 行动结果句
The plane was then able to rise and it cleared the mountains by 400 feet.
句子结构：并列句（and连接两个分句）
分句1：
[主语]: The plane
[状语]: then（然后）
[谓语]: was able to rise
（be able to表示"能够"的过去式）
分句2：
[主语]: it
[谓语]: cleared
[宾语]: the mountains
[状语]: by 400 feet（相差400英尺）
语法要点：
1. was able to 表示过去成功做到某事（强调结果）
2. could 表示过去的能力，不强调是否成功
3. cleared 意为"越过、通过（障碍物）"
4. by 400 feet 表示"相差/以...的幅度"
本句涉及语法术语：be able to
S7: 认知与原因句
Byrd now knew that he would be able to reach the South Pole which was 300 miles away, for there were no more mountains in sight.
句子结构：主从复合句（含宾语从句+定语从句+原因状语从句）
主句：
[主语]: Byrd
[状语]: now
[谓语]: knew
[宾语从句]: that he would be able to reach the South Pole [which was 300 miles away]
宾语从句：
that │ he │ would be able to reach │ the South Pole │ [which was 300 miles away]
连词 │ 主 │ 谓语（过去将来时） │ 宾语 │ 定语从句
定语从句（修饰South Pole）：
which │ was │ 300 miles away
关系代词│ 系动词│ 表语
原因状语从句（for引导）：
for │ there were │ no more mountains │ in sight
连词│ there be句型│ 主语 │ 状语
语法要点：
1. that引导宾语从句，作knew的宾语
2. would be able to 过去将来时+能力表达
3. which引导定语从句修饰the South Pole
4. for引导原因状语从句，表示补充说明的原因（语气较because弱）
5. there were no more mountains 表示"不再有山脉"
6. in sight 固定短语，意为"在视野范围内"
2.3 从句类型统计
| 从句类型 | 出现次数 | 典型例句 | 语法功能 |
|---|---|---|---|
| 让步状语从句 | 1次 | ”Though…Byrd and his men were able to…” | 表示转折关系 |
| 条件状语从句 | 1次 | ”if it rose to 10,000 feet” | 表示条件限制 |
| 定语从句 | 2次 | ”mountains that lay below” / “South Pole which was 300 miles away” | 修饰名词 |
| 名词性从句 | 2次 | ”it seemed certain that…” / “knew that he would…” | 作主语/宾语 |
| 原因状语从句 | 1次 | ”for there were no more mountains” | 补充说明原因 |
三、功能语法分析 (Functional Grammar)
3.1 时态系统分析
| 时态 | 出现次数 | 例句 | 语法功能 |
|---|---|---|---|
| 一般过去时 | 6次 | ”flew”, “rose”, “ordered”, “ran” | 叙述过去事件 |
| 过去将来时 | 2次 | ”would crash”, “would be able to” | 从过去看未来 |
| 情态动词+完成式 | 0次 | — | 本课未涉及 |
时态使用特点： 本课全文使用过去时态叙述1929年的历史事件，通过过去将来时（would）表示从过去视角看将要发生的事。
3.2 语态分析
| 语态 | 数量 | 例句 | 使用场景 |
|---|---|---|---|
| 主动语态 | 7句 | ”Byrd…flew”, “it rose”, “he ordered” | 强调执行者 |
| 被动语态 | 0句 | — | 本课未使用被动语态 |
语态选择分析： 本课为探险叙事，所有动作都有明确的执行者（Byrd、his men、the plane），因此全部使用主动语态，增强叙事的直接性和紧张感。
3.3 情态动词用法
| 情态结构 | 例句 | 语义功能 |
|---|---|---|
| was/were able to | ”were able to take”, “was able to rise” | 过去的能力（强调成功结果） |
| could | ”could only get over” | 过去的能力（强调可能性） |
| would | ”would crash”, “would be able to” | 过去将来时 |
was able to vs could 区别：
| 结构 | 用法 | 本课例句 |
|---|---|---|
| could | 表示过去的一般能力 | ”could only get over”（只能越过） |
| was able to | 强调过去成功做到某事 | ”was able to rise”（成功上升） |
教学提示：could仅表示有能力做，但不表示是否真的做了；was able to强调成功做到了。
3.4 从句连接词分析
| 连接词 | 功能 | 例句 |
|---|---|---|
| Though | 让步 | ”Though…they were able to…, they soon ran into…“ |
| that | 引导名词性从句 | ”it seemed certain that…”, “knew that…“ |
| that | 引导定语从句 | ”mountains that lay below” |
| if | 条件 | ”if it rose to 10,000 feet” |
| which | 定语从句 | ”South Pole which was 300 miles away” |
| for | 原因（补充说明） | “for there were no more mountains” |
四、本课语法重点总结
4.1 核心语法点
- 让步状语从句：用Though引导，表示”虽然…但是…”（注意英语中though和but不能同时使用）
- 条件状语从句：用if引导，表示”如果/只有当…才…”
- 定语从句：用that/which引导，修饰先行词
- 情态动词was/were able to与could的区别：前者强调成功结果，后者仅表示能力
- 过去将来时：would + 动词原形，表示从过去看将要发生的事
4.2 难句解析
难句：“Though, at first, Byrd and his men were able to take a great many photographs of the mountains that lay below, they soon ran into serious trouble.”
结构拆解：
[Though从句], [主句]
│
├── [插入语] at first（起初）
├── [主语] Byrd and his men
├── [谓语] were able to take
├── [宾语] a great many photographs
└── [定语] of the mountains [that lay below]（定语从句）
[主句]
├── [主语] they
├── [状语] soon
├── [谓语] ran into
└── [宾语] serious trouble
语法难点：
- 让步状语从句与主句构成转折关系
- 定语从句that lay below修饰mountains
- a great many 后接可数名词复数
- run into trouble 固定搭配
中文翻译：虽然开始时伯德和他的同伴能够拍摄到下面山脉的大量照片，但他们很快就陷入了严重的困境。
4.3 语法图谱
第43课 语法结构图谱
═══════════════════════════════════════════
【时态系统】
├── 一般过去时（叙事主体）
│ ├── flew, rose, ordered, cleared
│ └── ran, knew, lay, were
├── 过去将来时（未来视角）
│ ├── would crash
│ └── would be able to
└── 情态动词+原形
├── could (能力)
└── was/were able to (成功做到)
【从句系统】
├── 状语从句
│ ├── 让步状语从句: Though...
│ ├── 条件状语从句: if...
│ └── 原因状语从句: for...
├── 定语从句
│ ├── that lay below (修饰mountains)
│ └── which was 300 miles away (修饰South Pole)
└── 名词性从句
├── 主语从句: It seemed certain that...
└── 宾语从句: knew that...
【特殊结构】
├── 形式主语: It seemed certain that...
├── 同位语: the American explorer, R. E. Byrd
└── 插入语: at first
五、与四级考试的关联
| 语法点 | 四级考点 | 真题例句 |
|---|---|---|
| 让步状语从句 | Though/Although不能与but连用 | (2019-12) Though he is young, he knows a lot. |
| 条件状语从句 | 主将从现/主情从现 | (2020-6) If it rains tomorrow, we will cancel the trip. |
| 定语从句 | that/which选择 | (2018-12) The mountains that/which lie below… |
| was able to vs could | 表示能力的区别 | (2017-6) After hours of effort, he was able to solve the problem. |
| 过去将来时 | would + 动词原形 | (2019-6) He said he would come back soon. |
本课涉及的语法术语
- 让步状语从句 - 由though/although引导，表示”虽然…但是…”
- 条件状语从句 - 由if/unless等引导，表示条件关系
- 定语从句 - 由that/which/who等关系词引导，修饰先行词
- 名词性从句 - 包括主语从句、宾语从句、表语从句、同位语从句
- 一般过去时 - 表示过去发生的动作或状态
- 过去将来时 - 从过去视角看将要发生的事（would do）
- 情态动词 - 表达能力、可能性、必要性等
- be able to - 与could的区别在于强调成功结果
- 原因状语从句 - 由because/for/since/as引导，表示原因
- 不定式 - to + 动词原形，可作宾语补足语等
- 同位语 - 对名词进行补充说明的成分
- 插入语 - 插入句子中间的独立成分
- 短语动词 - 动词+副词/介词的组合，如throw out, run into
分析完成时间: 2026-04-02
课号: Lesson 43
文本长度: 约120词/7句