HSK 5
除非⋯⋯，才⋯⋯
chú fēi ⋯ ⋯ ， cái ⋯ ⋯
Unless..., only then...
Explanation
This is a compound sentence expressing condition (a sentence with two or more clauses, joined by a conjunction), expressing one SOLE, mandatory condition: only when that condition is satisfied will the result occur.
除非 (chúfēi: unless) + condition + ，+ 才 (cái: only then) + result. 除非 states the sole prerequisite, and 才 in the latter clause emphasizes 'only with that condition'. For example 除非你答应我，我才去 (unless you agree, only then will I go).
When you want to assert that only one path/condition leads to the result, excluding all other possibilities. It can combine with the synonymous 只有 (zhǐyǒu), or the reverse pattern 除非...否则... (chúfēi...fǒuzé...: unless... otherwise...).
除非...才... emphasizes the SOLE condition (stronger than 只要 zhǐyào: as long as). 只要...就... means just one of many conditions is enough; whereas 除非...才... excludes all other possibilities.
Vietnamese learners often wrongly use 就 (jiù) instead of 才 in the latter clause. With 除非 indicating a sole condition you must use 才; using 就 gives the wrong nuance. Also, don't omit 才, as it is the key word that locks down the condition.
Examples
Unless you agree with me, I won't go with you.
Unless you study hard, you won't have any chance of getting into university.
Unless he's in a good mood, he won't agree to our request.
Practice
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Learn “除非⋯⋯，才⋯⋯” effectively
The grammar point “除非⋯⋯，才⋯⋯” (Unless..., only then...) is one of the key structures at HSK 5. To use it fluently, you need to understand the contexts where it's used and practice regularly.
Study tip: read the examples aloud many times to build a natural reflex. Then try making your own sentences for your own situations. Use the audio button to hear and practice accurate pronunciation.
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