よさそうじゃない？↗ vs. よさそうじゃない。↘

ーWhat’s the Difference?

じゃない is used in many different ways in Japanese. Its most basic use is to make a negative statement:

わたしはにほんじんじゃない。
I am not Japanese.

きょうはげんきじゃない。
I am not feeling well today.

But what if you hear the following conversation between two people in a shop as they point to a product on the shelf?

Person A: “よさそうじゃない？↗”
Person B: “よさそうじゃない。↘”

What do you think they mean?

The two sentences look identical when written. But A says it with rising intonation, while B uses falling intonation.

That small difference in intonation changes what each speaker is communicating.

So what are A and B actually saying?

In this situation, A and B are discussing whether a product looks good or not.

A says, “よさそうじゃない？↗” with rising intonation, meaning “Doesn’t it look good?”
B replies, “よさそうじゃない。↘” meaning “It doesn’t look good.”

Although the two expressions look almost identical,じゃない functions differently in each one.

A: よさそうじゃない？↗

X + じゃない？ with rising intonation can be used when the speaker believes X to be true and asks the listener for confirmation or agreement.

Here, A is essentially saying, “I think this looks good. Don’t you think so?”

B: よさそうじゃない。↘   

In B’s reply, じゃない is simply making よさそう negative.

そう means that something looks or seems a certain way:

あのりんご、おいしそう。

That apple looks delicious.

Add じゃない, and it becomes negative:
あのりんご、おいしそうじゃない。
That apple doesn’t look delicious.

So when B says, “よさそうじゃない。↘” it means “It doesn’t look good.”

The words are almost identical. But the intonation changes how the sentence functionsーand what the speaker is communicating.

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