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plThe adverbs jiù 就 and cái 才 often convey opposite meanings. Each can express temporal sequence or the speaker’s subjective judgement of values such as age, duration, time, or quantity. In general, jiù 就 suggests that something happens earlier, faster, or with less effort than expected, while cái 才 indicates that something occurs later, more slowly, or with more difficulty than expected.
For explanation of the structures, check Adverb jiù 就 ‘right after’, ‘then’, ‘only; just’, ‘right; precisely’ and Adverb cái 才 ‘only after’, ‘not until’, ‘only’.
Differences
1. Expressing a succession of events
Both jiù 就 and cái 才 can link two verb phrases to show that one event happens after another. However, they express opposite temporal relations:
- jiù 就 indicates that the second action happens ‘right after’ the first.
- cái 才 indicates that the second action happens ‘only after; only then’ the first.
As shown in the examples, jiù 就 and cái 才 are generally preceded by a completed action, most commonly in the structure ‘verb + aspectual particle le 了 + object’, or a result complement, or by the negative form méi(yǒu) 没(有)/沒(有) ‘not’ placed before the verb. To indicate that the second action (the one after jiù 就 and cái 才) has also happened, the particle le 了 appears at the end of the sentence with jiù 就. With cái 才, the modal particle le 了 (了2) is optional rather than required. Without 了2, the sentence presents the second action as part of a completed sequence; with 了2, the speaker adds emphasis to the result as a newly realized or noteworthy outcome.
2. Expressing an assumed value is different than expected
Both jiù 就 and cái 才 can express the speaker’s subjective judgment that a certain value, such as age, duration, or quantity, is different from what would normally be expected by the speaker. In such a sentence, the value should precede jiù 就 or cái 才.
After age, duration, or quantity:
- jiù 就 indicates that something is younger, shorter or smaller than expected;
- cái 才 indicates that something is older, longer or larger than expected.
When a time reference is present in a sentence with jiù 就 and cái 才, its position determines whether the action is interpreted as earlier or later than expected:
- time reference + jiù 就 = the action occurred earlier than expected;
- time reference + cái 才 = the action occurred later than expected;
- jiù 就 + time reference = the action occurred later than expected;
- cái 才 + time reference = the action occurred earlier than expected.
3. Expressing a limited quantity
Both jiù 就 and cái 才 can also be used to convey the meaning of ‘only’. In this use, jiù 就 and cái 才 appear before a verb followed by a quantity, such as a numeral + measure word phrase.
However, their meanings differ significantly:
- cái 才 always indicates that the quantity is smaller than expected;
- jiù 就 does not inherently express whether the quantity is small or large; it only marks the speaker’s subjective evaluation, which must be inferred from context.