yīguì bùshì jīntiān chāixiè, jiùshì míngtiān chāixiè.

today

Breakdown of yīguì bùshì jīntiān chāixiè, jiùshì míngtiān chāixiè.

• 明天míngtiān: tomorrow
• 不是。。。就是búshì。。。jiùshì: either ... or

Questions & Answers about yīguì bùshì jīntiān chāixiè, jiùshì míngtiān chāixiè.

What does 不是……就是…… mean here?

It is a fixed pattern meaning either...or....

So:

衣柜不是今天拆卸，就是明天拆卸。
= The wardrobe will be dismantled either today or tomorrow.

It does not mean a literal sequence like is not today, then is tomorrow. As a whole, it gives two alternatives.

Why are 不是 and 就是 used together like this?

They work as a pair in this pattern:

• 不是 A，就是 B
• meaning either A, or B

In this sentence:

• A = 今天拆卸
• B = 明天拆卸

So the speaker is saying there are two possible times, and one of them will happen.

Does 不是……就是…… suggest uncertainty?

Usually, yes. It often suggests that the speaker is not stating exactly which one is true yet, but believes it must be one of the two options.

Here, it sounds like:

• the wardrobe will definitely be dismantled soon
• but the exact day is still today or tomorrow

Depending on tone and context, it can also sound like the speaker is narrowing the possibilities down to just those two.

Why is at the beginning if the wardrobe is not doing the action?