HSK 4
既然⋯⋯，就⋯⋯
jì rán ⋯ ⋯ ， jiù ⋯ ⋯
The structure '既然...就...'
Explanation
既然⋯⋯，就⋯⋯ (jìrán...jiù...) is a correlative conjunction pair (a pair of words connecting clauses of a sentence) forming a cause-and-effect compound sentence (a sentence with two clauses, the first being the reason, the second being the result), close in meaning to "since... then...", "now that... then..." in Vietnamese.
既然 jìrán + a premise that is already clear/has already happened, 就 jiù + the natural conclusion or action (e.g. 既然下雨了，我们就... = since it is raining, then we...).
when the reason in the first clause is an obvious fact or is already known/accepted, and you then draw a logical conclusion in the second clause.
既然 and 因为 yīnwèi (because) both give a reason, but 因为 presents a NEWLY introduced cause, whereas 既然 relies on something ALREADY KNOWN to infer a conclusion. Do not mix them up.
forgetting the word 就 jiù in the second clause (既然 very often pairs with 就); or placing 就 in the wrong spot — 就 must come after the subject of the second clause and before the verb.
Examples
Since you have already decided on this matter, then I won't say anything more.
Since it is raining outside, then let's go tomorrow instead.
Practice
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Learn “既然⋯⋯，就⋯⋯” effectively
The grammar point “既然⋯⋯，就⋯⋯” (The structure '既然...就...') is one of the key structures at HSK 4. To use it fluently, you need to understand the contexts where it's used and practice regularly.
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