(~に)似ていない(で), (~と)違ちがって ⦣ unlike の次に(代)名詞(つまり目的語)が続けば unlike は前置詞. like 2前like 2形
The twins are quite unlike.
The twins are quite unlike.
その双子ふたごは全く似ていません.
Unlike his brother, he is kind.
Unlike his brother, he is kind.
兄[弟]に似ず彼は優やさしい.
It's unlike him to be so late.
It's unlike him to be so late.
こんなに遅おくれるなんて彼らしくないね.