如果...就 If...Then
如果...就 expresses a conditional relationship: if a condition is met, then a result follows.
Pattern
如果 + Condition, Subject + 就 + Result
Explanation
如果 introduces the condition (if-clause) and 就 introduces the result (then-clause). 如果 can be replaced by 要是 in casual speech.
如果 can be omitted when the conditional meaning is clear from context, but 就 is usually kept. The condition clause always comes before the result clause.
Examples
如果明天下雨，我们就不去了。
Rúguǒ míngtiān xià yǔ, wǒmen jiù bú qù le.
If it rains tomorrow, we won't go.
如果你有问题，就问我吧。
Rúguǒ nǐ yǒu wèntí, jiù wèn wǒ ba.
If you have questions, just ask me.
要是你不喜欢，就别买了。
Yàoshi nǐ bù xǐhuān, jiù bié mǎi le.
If you don't like it, then don't buy it.
Common Mistakes
我们就不去了，如果明天下雨。
如果明天下雨，我们就不去了。
The condition clause (如果) must come before the result clause (就).
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