建议位置：高2·上；原创能力递进，不等同于学校实际学期/人教版单元。只训练书面英语。每个编号计一道练习；编号内小项不重复计数。
学习目标
- 根据语义区分原因、结果、让步、条件和目的
- 避免中文连接词双重映射与假连接
- 用恰当的从句或介词短语建立逻辑
- 在“因果、转折与范围限定的表达”语境中区分常用词义、搭配并完成新的书面迁移。
核心讲解
1. 连接词决定推理关系
because/as/since 可引导原因，但 since/as 还可能有时间等意义，需看语境。although/even though 引导让步；even if 表即使某条件发生，不保证条件已发生。unless≈if…not，但只在逻辑允许时替换；unless not… 可能形成双重否定。
2. 主从结构与并列结构不同
Because it rained, we stayed inside. 不再加 so。Although it was expensive, we bought it. 不再加 but。however/therefore 是连接副词，不能单独用逗号把两个完整句粘起来。because 后接从句；because of/despite/in spite of 后接名词性成分。
3. 结果与目的
so + adj./adv. + that；such +（a/an）+ adj. + n. + that。so that 可表目的（常伴 can/could）也可表结果，必须结合语境。We labelled the boxes so that people could find the tools easily：目的。
4. 条件限制范围
as long as/provided that 表只要/条件是；in case 表以防，不等于 if：Take a map in case the phone fails 是预先准备，不是等手机坏了才带。while 既可表同时，也可表对照；whereas 常明确表对照。
主题词汇拓展：因果、转折与范围限定的表达
下面的词条按本课情境扩展意义与搭配，不是课标完整词表。先把词分成“人/物、行动、性质/关系”三组；同一中文词不保证英语可互换。每条搭配示范本课采用的义项。读完语境再做新增的两项迁移题；能认出词义但不能在句中正确使用时，仍应保留为待复习项。
本课词汇与搭配
| 词条 | 词性 / 条目类型 | 核心义 | 语境搭配 |
|---|---|---|---|
| investigation | n. | 调查 | continue an investigation |
| accurate | adj. | 准确的 | accurate measurements |
| contrast | n./v. | 对照 | in contrast |
| consequence | n. | 后果 | an unexpected consequence |
| condition | n. | 条件 | under these conditions |
| precaution | n. | 预防措施 | take precautions |
| provided | conj. | 如果；条件是 | provided that it is safe |
| whereas | conj. | 然而；相比之下 | A is cheap whereas B is durable |
| despite | prep. | 尽管 | despite the delay |
| therefore | adv. | 因此 | therefore, we revised it |
| otherwise | adv. | 否则 | save it; otherwise… |
| purpose | n. | 目的 | serve a purpose |
| consequently | 单词 | 因此 | consequently, demand fell |
| nevertheless | 单词 | 然而仍然 | nevertheless, the plan continued |
| nonetheless | 单词 | 尽管如此 | nonetheless useful |
| furthermore | 单词 | 此外 | furthermore, costs increased |
| moreover | 单词 | 而且 | moreover, access improved |
| conversely | 单词 | 反过来 | conversely, low demand reduces pressure |
| likewise | 单词 | 同样地 | likewise, the second group improved |
| similarly | 单词 | 类似地 | similarly affected |
| accordingly | 单词 | 相应地 | adjust the plan accordingly |
| hence | 单词 | 因此 | hence the delay |
| thereby | 单词 | 从而 | reduce waste, thereby saving resources |
| regardless of | 短语 | 不管 | regardless of age |
| owing to | 短语 | 由于 | owing to heavy rain |
| due to | 短语 | 由于 | a delay due to repairs |
| in spite of | 短语 | 尽管 | in spite of the cost |
| on condition that | 短语 | 在……条件下 | agree on condition that… |
| as long as | 短语 | 只要 | as long as it remains safe |
| in case | 短语 | 以防 | carry a copy in case… |
| even if | 短语 | 即使 | even if the plan changes |
| even though | 短语 | 尽管事实如此 | even though it was costly |
| rather than | 短语 | 而不是 | evidence rather than guesses |
| instead of | 短语 | 代替；而不是 | instead of guessing |
| in contrast | 短语 | 相比之下 | in contrast, costs fell |
| by contrast | 短语 | 相比之下 | by contrast, demand rose |
| in addition | 短语 | 此外 | in addition, we checked dates |
| as a result | 短语 | 结果 | as a result, access improved |
| for instance | 短语 | 例如 | for instance, local maps |
| in particular | 短语 | 尤其 | in particular, older records |
| to some extent | 短语 | 在一定程度上 | true to some extent |
| under certain circumstances | 短语 | 在某些情况下 | useful under certain circumstances |
阅读材料
主题词汇语境：因果、转折与范围限定的表达
The path was closed owing to repairs. Nevertheless, access to the village remained possible by another route. Visitors were asked to carry a printed map in case their phones lost connection. The alternative was longer; consequently, the organiser adjusted the arrival time. The change helped some travellers, but not everyone to the same extent. A report should state these conditions rather than present the revised route as universally convenient.
例题解析
例 1 Although the sample was small, the result was useful. 主句肯定有用，同时保留样本小的让步，不能改 therefore 而保持原逻辑。
例 2 The device is so light that one person can carry it / It is such a light device that one person can carry it。注意 such 后名词结构。
例 3 Unless you save the file, your changes may be lost. = If you do not save the file…；不能机械改为 If you save…not。
练习
改错：Although the evidence was limited, but the team continued the investigation.
选择并解释：Take a printed copy (if/in case) the screen stops working. 此处要求提前准备。
用 because of 改写：The match was cancelled because the field was flooded.
合并成 so…that：The instructions were clear. Everyone could follow them.
用 unless 改写且保持意义：If you do not return the book by Friday, you will receive a reminder.
选择适合连接并说明关系：The first method is cheap, ___ the second is more accurate. A. whereas B. because C. unless。
【主题词汇·辨义】四选搭配解释：①because of名词结构的近义词组；②虽有障碍仍然如此；③提前应对可能故障；④只在一定程度成立。用本组各选一项。
【主题词汇·迁移】写两句：一项调整有益但并非人人受益；再说明适用条件。至少用nevertheless和under certain circumstances。
参考答案与解析 · 完成练习后展开
参考答案与解析
Although the evidence was limited, the team continued the investigation. 删除 but；也可去 Although 写 The evidence was limited, but…，不要双重连接。
in case。带纸质副本是为可能出现的故障预先准备；if 通常把行动置于故障发生这一条件下。
The match was cancelled because of the flooded field / because of flooding on the field. because of 后接名词短语，不接 the field was flooded 这种完整从句。
The instructions were so clear that everyone could follow them. clear 为形容词，故 so clear，不用 such clear。
Unless you return the book by Friday, you will receive a reminder. unless 已含 if…not 意义，不再加 don’t。
A whereas，明确比较两种方法各自特点；because 会误造因果，unless 会误造条件。也可用 while，需上下文避免时间歧义。
①owing to/due to；②nevertheless/nonetheless（连接副词，注意句子边界）；③in case（接从句）；④to some extent。同义选项可接受，但不能把however直接当并列连词拼接两完整句。
示例：The new route is shorter; nevertheless, it may be difficult for visitors carrying heavy bags. It is a useful alternative under certain circumstances, especially when the main entrance is closed. 要点：分号/句号正确；转折真实；条件具体不空泛。
订正与迁移
先遮住答案独立完成，再为每处错误记录“语境线索—适用规则—我的新例句”。隔一天换一个主题复做，不以背熟本页答案代替迁移。完整篇章写作按题后量规人工核查，短句产出按答案中的结构与信息要点自查；不把示例当成唯一答案。
课程与来源说明
原创高中书面英语能力递进课；参考人教版必修—选择性必修的能力梯度，但未取得学习者学校的准确版次和教学表，年级/学期仅为建议学习位置，不等同于官方教材单元对应。课标以2017年版2025年修订为当前版本；不把2020年文本称为最新，也不声称已逐条核对2025全文。考试形式参照已核验的江西/新课标公开说明；不含听力。
本课讲解、例句、语篇和题目为原创。来源链接用于课程/考试形式定位，不表示转载官方试题或逐句对应教材：