Questions & Answers about rúguǒ tā bù lái, wǒmen jiù míngtiān zài qù.
What does the particle 就 (jiù) do here? Can I omit it?
就 marks the natural/quick consequence: “then/in that case.” In the pattern 如果…就…, it ties the condition to the result. You can omit it and the sentence is still correct: 她不来,我们明天再去. With 就, the link feels tighter and a bit more decisive.
Does 再 (zài) mean “again” here, or “later/instead”?
Why is the order 明天再去? Could I say 再明天去 or 再去明天?
The natural order is time word before the verb and 再 directly before the verb: 明天 再 去. 再 modifies the verb and likes to sit right in front of it. 再明天去 and 再去明天 are ungrammatical in this sense.
Can I drop 如果 or 就?
Yes. All of these are fine (slightly different nuance/formality):
- 她不来,我们明天再去。
- 如果她不来,我们明天再去。
- 她不来,我们就明天再去。
- 要是她不来,我们就明天再去。
- 她不来的话,我们就明天再去。 Dropping 就 keeps the meaning, just a touch less pointed.