除非

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Character Breakdown

Usage of 除非

除非 is a conjunction used to introduce a necessary condition, meaning "only if" or "unless." It sets a prerequisite for the main clause to happen. The structure often pairs 除非 with 否则 (otherwise) to emphasize the condition and its consequence.

Common Patterns

  • 除非 + condition, 否则 + result: This is the most frequent pattern, showing a clear cause and effect.
  • 除非 + condition, (main clause): Sometimes 否则 is omitted but the meaning remains.

Nuances

Using 除非 implies that the speaker considers the condition essential and exceptions unlikely. It is more formal and stronger than just using 如果 (if). It often appears in both spoken and written Chinese.

Collocations

  • 除非...否则... (only if... otherwise...): Emphasizes the necessity of the condition.
  • 除非... (only if you...): Common in advice or warnings.
  • 除非下雨 (only if it rains): Typical in weather-related conditions.

Common Confusion

Do not confuse 除非 with (only) or 如果 (if). 除非 stresses the necessity of the condition, while 如果 simply introduces a condition without implying necessity.

Example Sentences

Only if you tell me in advance, otherwise I won't change the plan.

We will only cancel the outdoor activity if it rains.

Unless you study hard, it is difficult to pass the exam.