〜そう（様態）
N4Formation:
い-adj / な-adj + そう い-adj(nai-form) / な-adj(nai-form) + なさそう
It looks like ~. Used when the speaker describes what they felt or sensed visually. Conjugates like な-adjectives. Cannot be used for things that are immediately obvious (e.g., かわいい, きれい).
Examples
この料理はおいしそうです。
This dish looks delicious.
彼は優しそうな人ですね。
He seems like a kind person.
このカバンは重そうです。
This bag looks heavy.
彼女は元気そうに見えます。
She looks energetic.
このテストは難しそうだ。
This test looks difficult.
あの映画は面白くなさそうです。
That movie doesn't look interesting.
彼は元気じゃなさそうです。
He doesn't look well.
この問題は簡単じゃなさそうだ。
This problem doesn't look easy.
天気が良くなさそうですね。
The weather doesn't look good.