词根信息
cur / curs / cours — 跑、流动
核心含义
拉丁语 currere = to run, to flow。这个根在英语中延伸出三条线索：
- “跑” → 路径/行程 → course, curriculum, excursion
- “流动” → 现存的/通行中的 → current, currency, currently
- “跑到面前” → 发生/出现 → occur, occurrence, recur
派生词网络
Tier 1 — 雅思高频核心（必须掌握）
| 单词 | 拆解 | 字面义 | 实际义 |
|---|---|---|---|
| course | cours(e) ← cursus(跑的路径) | 跑的路径 | 课程、过程、路线 |
| current | curr(流动) + -ent(…的) | 正在流动的 | 当前的、水流/电流 |
| occur | oc-(=ob,向) + cur(跑) | 跑到面前来 | 发生、出现 |
| currency | curr(流动) + -ency(名词) | 流通之物 | 货币、通用 |
Tier 2 — 重要扩展
| 单词 | 拆解 | 字面义 | 实际义 |
|---|---|---|---|
| curriculum | curri(跑) + culum(场所) | 跑完全程的东西 | 全部课程 |
| excursion | ex-(出) + curs(跑) + -ion | 跑出去 | 短途旅行、远足 |
| occurrence | occur + -ence(名词) | 发生的事 | 事件、发生的事情 |
| recur | re-(再) + cur(跑) | 再次跑来 | 再次发生、反复出现 |
| precursor | pre-(前) + curs(跑) + -or | 跑在前面的人/物 | 先驱、前兆 |
| concurrent | con-(一起) + curr(跑) + -ent | 一起跑的 | 同时发生的 |
| discourse | dis-(分开) + course(跑) | 跑来跑去 → 交流 | 话语、论述 |
例句（IELTS 场景）
- course — The course covers topics ranging from basic grammar to academic writing.
- 听力/口语：enroll in a course, compulsory course, of course
- current — The current situation demands immediate action from policymakers.
- 写作万能替换词：the current state of, current trends indicate
- occur — Natural disasters occur with increasing frequency due to climate change.
- 写作 Task 2 描述现象：it never occurred to me that…
- currency — A stable currency is essential for international trade and investment.
- 阅读/写作经济话题
- curriculum — The school has redesigned its curriculum to include more practical skills.
- 写作 Task 2 教育话题核心词
- occurrence — Such occurrences are rare but highlight the need for better safety measures.
- 写作描述事件：a common / rare / everyday occurrence
- recur — The same issue recurs in many developing countries.
- 写作描述持续问题：a recurring theme / problem / pattern
- concurrent — The two conferences will run concurrently next week.
- 阅读：concurrent with / simultaneously
常见搭配速记
| 搭配 | 含义 | 场景 |
|---|---|---|
| of course | 当然 | 口语万能 |
| in the course of | 在…过程中 | 写作 |
| a crash course | 速成班 | 口语 |
| current affairs | 时事 | 听力/阅读 |
| current situation / trend | 当前形势/趋势 | 写作 Task 2 |
| occur to someone | 某人突然想到 | 口语/写作 |
| curriculum vitae (CV) | 简历 | 听力/求职 |
| foreign currency | 外币 | 听力 Section 1 |
前缀拆解公式
[前缀] + cur/curs/cours
oc- 向 + cur → occur 发生（跑到面前）
re- 再 + cur → recur 反复出现（再次跑来）
ex- 出 + curs → excursion 短途旅行（跑出去）
pre- 前 + curs → precursor 先驱（跑在前面的）
con- 一起 + curr → concurrent 同时发生的（一起跑的）
dis- 分开 + cours → discourse 话语（跑来跑去的交流）
易混辨析
- course vs curriculum：course 是一门课，curriculum 是全部课程体系
- current 做名词三种义项：水流、电流、潮流趋势 — 核心都是”流动”
- occur vs happen：occur 更正式，happen 更口语，写作中 occur 更优
- currency 不只是”货币”——还表示”通用性”（the idea has gained wide currency）