couldn't help but ...
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康軒 九上 Unit 3
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couldn't help but ...
couldn't help but ...
片語
片語摘要
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couldn't help but + 原形動詞：表示「忍不住/不禁」做了某事
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常用於過去情境；現在情境對應為 can't help but + V
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可與情緒/反應動詞搭配：laugh, smile, cry, shout 等
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容易混淆：but 後面不加 to；也別和 V-ing 形式混用
形式與用法
couldn't help but + V
結構為「主詞 + couldn't help but + 原形動詞」，表示在過去某情境下「忍不住」做了某事。常用於表達自然、不自覺的反應（如笑、哭、嘆氣、看手機等）。注意 but 後面接原形動詞，不要加 to。
範例：
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When the teacher told a joke, we couldn't help but laugh.
老師講了笑話，我們忍不住笑了。
其他形式：
can't help but + V
用於現在或一般事實的「忍不住」。語氣自然，口語與書面皆可。but 後面接原形動詞，不加 to。
範例：
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When I see bubble tea, I can't help but buy one.
只要看到手搖飲，我就忍不住想買一杯。
couldn't help + V-ing
與 couldn't help but + V 意義相同，為常見替代用法。後面接動名詞（V-ing）。兩者不應混用（不可寫成 couldn't help but V-ing）。
範例：
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The story was so funny that we couldn't help laughing.
這個故事太好笑了，我們忍不住笑了。
can't help + V-ing
現在時的替代用法，與 can't help but + V 同義，但文法結構不同：此處用 V-ing。
範例：
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I can't help thinking about my future after graduation.
想到畢業後的未來，我就忍不住一直想。
常見錯誤
✗
I couldn't help but to cry.
✓
I couldn't help but cry.
but 後面要接原形動詞，不加 to。不需寫成 to cry。
✗
We couldn't help but laughing.
✓
We couldn't help laughing. / We couldn't help but laugh.
不能把兩種結構混在一起。要嘛用 couldn't help + V-ing，要嘛用 couldn't help but + V。
✗
I can't help but laughed.
✓
I can't help but laugh.
but 後面需用原形動詞，不能用過去式或加 -ed。
✗
I couldn't help but happy.
✓
I couldn't help but feel happy. / I couldn't help being happy.
but 後面要接動詞，若要表達形容詞「happy」，需搭配動詞如 feel/be 或改用 being + 形容詞。
同義詞與反義詞
同義
couldn't stop V-ing
(無法停止⋯)
語氣接近，但強調「已經在做某事」而停不下來；couldn't help but 著重「忍不住去做」的衝動或自然反應。
同義
couldn't resist N/V-ing
(無法抗拒⋯)
強調誘惑或衝動的「抗拒失敗」，語氣略比 couldn't help but 更側重「抵抗不了」。
同義
can't help V-ing
(忍不住⋯（V-ing 形式）)
同義結構，但文法為 V-ing；couldn't help but 用於過去或 can't help but 用於現在且接原形動詞。
反義
managed to resist V-ing
(設法忍住不⋯)
為反義，表示成功克制沒有去做。
反義
kept from V-ing
(克制不⋯；避免⋯)
反義用法，表示「避免做某事」，與 couldn't help but 的「忍不住去做」相反。
出現於
康軒·九上·Unit 3
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