台灣考生最常用錯的對比片語就是這組：

❌ Cars are convenient. On the other hand, they pollute.

第一句沒有 On the one hand 開頭——所以 On the other hand 沒有「另一隻手」可以對比。Coherence 扣分。

為什麼這個錯誤普遍

中文「另一方面」可以單獨使用——它前面不一定要有「一方面」。但英文 on the other hand 是配對片語：用了就要有 on the one hand 開場。

三大常見陷阱

陷阱 1：單腳走路（沒有 on the one hand）

| ❌ Wrong | ✅ Better | |---------|----------| | Cars are convenient. On the other hand, they pollute. | Cars are convenient; however, they pollute. | | English is global. On the other hand, learning it takes years. | English is global, but mastering it takes years. |

陷阱 2：兩腳距離太遠

❌ On the one hand, public transport is cheap. It runs on fixed routes. It serves millions daily. It connects suburbs to city centres. On the other hand, it can be crowded.

第一隻手講了 4 句才換手——對比早就消失了。配對片語應該在相鄰兩句。

陷阱 3：兩邊不對等

| ❌ 不對等 | ✅ 平衡 | |---------|--------| | On the one hand, smartphones are useful. On the other hand, the screen is small. | On the one hand, smartphones offer constant connectivity; on the other, they fragment attention. |

第一個版本：「有用」(大優點) vs「螢幕小」(小缺點)——不對等。

正確結構

標準配對句型：

On the one hand, [優點/觀點 A]. On the other hand, [缺點/觀點 B].

注意：

  • 兩句緊鄰
  • 兩邊份量相當
  • On the other 後面有逗號
  • 不用 On the one other hand（誤拼很常見）

替代方案——什麼時候別用這組

如果只想說「然而」，用其他選項：

| 想表達 | 可選 | |--------|------| | 簡單轉折 | however, but, yet, although | | 強對比 | by contrast, conversely, in contrast | | 雙面評估 | while ... , ... / whereas ... , ... |

❌ Bad / ✅ Better 完整對照

| ❌ 陷阱 | ✅ 正確 | |---------|--------| | On the other hand, the policy has flaws.（單腳） | However, the policy has flaws. | | On the one hand, A. (跳三句). On the other hand, B. | On the one hand, A. On the other hand, B. | | On other hand, ...（漏 the） | On the other hand, ... | | In one hand, ...（介系詞錯） | On the one hand, ... |

Quick Rewrite Drill

下面 6 句修正錯誤或重寫：

  1. Cars are fast. On the other hand, they cause accidents.
  2. On the one hand, technology helps. On other hand, it isolates us.
  3. On the one hand, online learning is flexible. Students can study anywhere. They save commute time. The cost is lower. On the other hand, it lacks social interaction.
  4. In one hand, public healthcare is fair. On the other hand, it is slow.
  5. On the other hand, exercise prevents disease.
  6. On the one hand, working long hours pays well. On the other hand, my back hurts.

Answer Key

| # | ✅ 修正 | |---|--------| | 1 | Cars are fast, but they cause accidents.（沒配對，改 but/however） | | 2 | On the one hand, technology helps. On the other hand, it isolates us.（補 the） | | 3 | On the one hand, online learning offers unmatched flexibility. On the other hand, it lacks the social interaction that classrooms provide.（兩邊各一句） | | 4 | On the one hand, public healthcare is fair. On the other hand, it is slow. | | 5 | However, exercise prevents disease.（單腳→改 however） | | 6 | On the one hand, long hours pay well; on the other, they take a physical toll.（提升對比份量） |

一句總結

兩隻手要一起出現、一起站好。落單的「on the other hand」用 however 取代就好。

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